Commit Graph

45274 Commits

Author SHA1 Message Date
David S. Miller
035df35d96 sparc64: Allocate sufficient stack space in ftrace stubs.
128 bytes is sufficient for the register window save area, but the
calling conventions allow the callee to save up to 6 incoming argument
registers into the stack frame after the register window save area.

This means a minimal stack frame is 176 bytes (128 + (6 * 8)).

This fixes random crashes when using the function tracer.

Reported-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-04-13 18:59:02 -07:00
Frederic Weisbecker
2e2dc1d755 sparc: Fix forgotten kmemleak headers inclusion
Fix forgotten kmemleak headers inclusion for kmemleak_not_leak()
declaration.

This fixes the following build error:

	arch/sparc/kernel/irq_64.c: In function ‘sun4v_build_virq’:
	arch/sparc/kernel/irq_64.c:657: error: implicit declaration of function ‘kmemleak_not_leak’

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-04-13 14:28:24 -07:00
Ingo Molnar
2b2f862ee6 Merge branch 'iommu/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/linux-2.6-iommu into x86/urgent 2010-04-13 13:24:54 +02:00
David S. Miller
c011f80ba0 sparc64: Add some more commentary to __raw_local_irq_save()
Suggested by Peter Zijlstra

Signed-off-by: David S. Miller <davem@davemloft.net>
2010-04-13 01:50:43 -07:00
David S. Miller
9343af084c Merge branch 'master' of /home/davem/src/GIT/linux-2.6/
Conflicts:
	lib/Kconfig.debug
2010-04-13 00:28:45 -07:00
David S. Miller
e182c77cc2 sparc64: Fix memory leak in pci_register_iommu_region().
Found by kmemleak.

If request_resource() fails, we leak the struct resource we
allocated to represent the IOMMU mapping area.

This actually happens on sun4v machines because the IOMEM area is only
reported sans the IOMMU region, unlike all previous systems.  I'll
need to fix that at some point, but for now fix the leak.

Signed-off-by: David S. Miller <davem@davemloft.net>
2010-04-12 23:46:18 -07:00
David S. Miller
25ad403f67 sparc64: Add kmemleak annotation to sun4v_build_virq()
The only reference we store to this memory is in the form of a
physical address, so kmemleak can't see it.

Add a kmemleak_not_leak() annotation.

It's probably useful to be able to look at a dump of these things
either via debugfs or similar, and thus we could at some point store
them in some kind of table and therefore get rid of this annotation.

Signed-off-by: David S. Miller <davem@davemloft.net>
2010-04-12 23:46:17 -07:00
David S. Miller
8b8d8e2840 sparc64: Support kmemleak.
Only missing thing was an _sdata marker in vmlinux.lds.S

Signed-off-by: David S. Miller <davem@davemloft.net>
2010-04-12 23:46:17 -07:00
David S. Miller
9960e9e894 sparc64: Add function graph tracer support.
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-04-12 22:37:26 -07:00
David S. Miller
a71d1d6bb1 sparc64: Give a stack frame to the ftrace call sites.
It's the only way we'll be able to implement the function
graph tracer properly.

A positive is that we no longer have to worry about the
linker over-optimizing the tail call, since we don't
use a tail call any more.

Signed-off-by: David S. Miller <davem@davemloft.net>
2010-04-12 22:37:15 -07:00
David S. Miller
daecbf58a5 sparc64: Use a seperate counter for timer interrupts and NMI checks, like x86.
This keeps us from having to use kstat_irqs_cpu() from the NMI handler,
the former of which is a profiled function.

Instead we use a currently empty slot in the cpu_data

Signed-off-by: David S. Miller <davem@davemloft.net>
2010-04-12 22:37:07 -07:00
David S. Miller
f8e8a8e8cb sparc64: Remove profiling from some low-level bits.
These include the timer implementation, perf events support, and the
performance counter register (pcr) programming layer.

Signed-off-by: David S. Miller <davem@davemloft.net>
2010-04-12 22:36:19 -07:00
David S. Miller
d96478d5a2 sparc64: Kill unnecessary static on local var in ftrace_call_replace().
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-04-12 22:36:10 -07:00
David S. Miller
ddacd0bc70 sparc64: Kill CONFIG_STACK_DEBUG code.
The generic stack tracer does this job just as well.

Signed-off-by: David S. Miller <davem@davemloft.net>
2010-04-12 22:36:03 -07:00
David S. Miller
63b7549573 sparc64: Add HAVE_FUNCTION_TRACE_MCOUNT_TEST and tidy up.
Check function_trace_stop at ftrace_caller

Toss mcount_call and dummy call of ftrace_stub, unnecessary.

Document problems we'll have if the final kernel image link
ever turns on relaxation.

Properly size 'ftrace_call' so it looks right when inspecting
instructions under gdb et al.

Signed-off-by: David S. Miller <davem@davemloft.net>
2010-04-12 22:35:24 -07:00
David S. Miller
0c25e9e6cb sparc64: Adjust __raw_local_irq_save() to cooperate in NMIs.
If we are in an NMI then doing a plain raw_local_irq_disable() will
write PIL_NORMAL_MAX into %pil, which is lower than PIL_NMI, and thus
we'll re-enable NMIs and recurse.

Doing a simple:

	%pil = %pil | PIL_NORMAL_MAX

does what we want, if we're already at PIL_NMI (15) we leave it at
that setting, else we set it to PIL_NORMAL_MAX (14).

This should get the function tracer working on sparc64.

Signed-off-by: David S. Miller <davem@davemloft.net>
2010-04-12 22:21:52 -07:00
David S. Miller
cb256aa604 sparc64: Use kstack_valid() in die_if_kernel().
This gets rid of a local function (is_kernel_stack()) which tries to
do the same thing, yet poorly in that it doesn't handle IRQ stacks
properly.

Signed-off-by: David S. Miller <davem@davemloft.net>
2010-04-12 22:16:22 -07:00
Linus Torvalds
50b88c46f0 Merge master.kernel.org:/home/rmk/linux-2.6-arm
* master.kernel.org:/home/rmk/linux-2.6-arm: (21 commits)
  ARM: Fix ioremap_cached()/ioremap_wc() for SMP platforms
  ARM: 6043/1: AT91 slow-clock resume: Don't wait for a disabled PLL to lock
  ARM: 6031/1: fix Thumb-2 decompressor
  ARM: 6029/1: ep93xx: gpio.c: local functions should be static
  ARM: 6028/1: ARM: add MAINTAINERS for U300
  ARM: 6024/1: bcmring: fix missing down on semaphore in dma.c
  MXC: mach_armadillo5x0: Add USB Host support.
  ARM mach-mx3: duplicated include
  ARM mach-mx3: duplicated include
  imx31: add watchdog device on litekit board.
  imx3: Add watchdog platform device support
  MXC: mach-mx31_3ds: add support for freescale mc13783 power management device.
  MXC: mach-mx31_3ds: Add SPI1 device support.
  MXC: mach-mx31_3ds: Add support for on board NAND Flash.
  MXC: mach-mx31_3ds: Update variable names over recent mach name modification.
  imx31: fix parent clock for rtc
  i.MX51: remove NFC AXI static mapping
  i.MX51: determine silicon revision dynamically
  i.MX51: map TZIC dynamically
  i.MX51: Use correct clock for gpt
  ...
2010-04-12 18:37:34 -07:00
David Daney
f6be75d03c MIPS: Calculate proper ebase value for 64-bit kernels
The ebase is relative to CKSEG0 not CAC_BASE.  On a 32-bit kernel they
are the same thing, for a 64-bit kernel they are not.

It happens to kind of work on a 64-bit kernel as they both reference
the same physical memory.  However since the CPU uses the CKSEG0 base,
determining if a J instruction will reach always gives the wrong result
unless we use the same number the CPU uses.

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/1093/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-04-12 17:26:22 +01:00
Manuel Lauss
d8000beef2 MIPS: Alchemy: DB1200: Remove custom wait implementation
While playing with the out-of-tree MAE driver module, the system would
panic after a while in the db1200 custom wait code after wakeup due to
a clobbered k0 register being used as target address of a store op.

Remove the custom wait implementation and revert back to the Alchemy-
recommended implementation already set as default.

Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com>
To: Linux-MIPS <linux-mips@linux-mips.org>
Patchwork: http://patchwork.linux-mips.org/patch/1092/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-04-12 17:26:22 +01:00
Ralf Baechle
2844e49f5e MIPS: Big Sur: Make defconfig more useful.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-04-12 17:26:22 +01:00
Anton Altaparmakov
7b3e543ddb MIPS: Fix __vmalloc() etc. on MIPS for non-GPL modules
Commit b3594a089f1c17ff919f8f78505c3f20e1f6f8ce (lmo) rsp.
351336929c (kernel.org) break non-GPL modules
that use __vmalloc() or any of the vmap(), vm_map_ram(), etc functions on
MIPS.

All those functions are EXPORT_SYMBOL() so are meant to be allowed to be
used by non-GPL kernel modules.  These calls all take page protection as
an argument which is normally a constant like PAGE_KERNEL.

This commit causes all protection constants like PAGE_KERNEL to not be
constants and instead to contain the GPL-only symbol _page_cachable_default.

This means that all calls to __vmalloc(), vmap(), etc, cause non-GPL
modules to fail to link with the complaint that they are trying to use the
GPL-only symbol _page_cachable_default...

Change EXPORT_SYMBOL_GPL(_page_cachable_default) to EXPORT_SYMBOL() for
non-GPL modules that call __vmalloc(), vmap(), vm_map_ram() etc.

Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
Cc: Chris Dearman <chris@mips.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: http://patchwork.linux-mips.org/patch/1084/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-04-12 17:26:21 +01:00
Ralf Baechle
3d45285dd1 MIPS: Sibyte: Fix M3 TLB exception handler workaround.
The M3 workaround needs to cmpare the region and VPN2 fields only.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-04-12 17:26:21 +01:00
Florian Fainelli
5e3644a95d MIPS: BCM63xx: Fix build failure in board_bcm963xx.c
Since 2083e8327aeeaf818b0e4522a9d2539835c60423, the SPROM is now registered
in the board_prom_init callback, but it references variables and functions
which are declared below.  Move the variables and functions above
board_prom_init.

Signed-off-by: Florian Fainelli <ffainelli@freebox.fr>
To: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/1077/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-04-12 17:26:20 +01:00
Ralf Baechle
5808184f1b MIPS: uasm: Add OR instruction.
This is needed for the fix of the M3 workaround.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-04-12 17:26:20 +01:00
Ralf Baechle
8d9df29db2 MIPS: Sibyte: Apply M3 workaround only on affected chip types and versions.
Previously it was unconditionally used on all Sibyte family SOCs.  The
M3 bug has to be handled in the TLB exception handler which is extremly
performance sensitive, so this modification is expected to deliver around
2-3% performance improvment.  This is important as required changes to the
M3 workaround will make it more costly.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-04-12 17:26:19 +01:00
Maxime Bizon
9538ca636f MIPS: BCM63xx: Initialize gpio_out_low & out_high to current value at boot.
To avoid a glitch during GPIO initialisation read GPIO output register
values left by the firmware.

Signed-off-by: Maxime Bizon <mbizon@freebox.fr>
To: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/903/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-04-12 17:26:19 +01:00
Florian Fainelli
e23a90eb73 MIPS: BCM63xx: Register SSB SPROM fallback in board's first stage callback
Signed-off-by: Florian Fainelli <ffainelli@freebox.fr>
To: Maxime Bizon <mbizon@freebox.fr>
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/1017/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-04-12 17:26:18 +01:00
Maxime Bizon
4fe67e44a0 MIPS: BCM63xx: Fix typo in cpu-feature-overrides file.
Fix typo: CONFIG_BCMCPU_IS_63xx does not exist;
CONFIG_BCM63XX_CPU_63xx is the valid config option.

Signed-off-by: Maxime Bizon <mbizon@freebox.fr>
To: linux-mips@linux-mips.org
Cc: Maxime Bizon <mbizon@freebox.fr>
Patchwork: http://patchwork.linux-mips.org/patch/901/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-04-12 17:26:18 +01:00
Maxime Bizon
524ef29cff MIPS: BCM63xx: Add support for second uart.
The BCm63xx SOC has two uarts.  Some boards use the second one for
bluetooth.  This patch changes platform device registration code to
handle this.  Changes to the UART driver were already merged in
6a2c7eabfd.

Signed-off-by: Maxime Bizon <mbizon@freebox.fr>
To: linux-mips@linux-mips.org
Cc: Maxime Bizon <mbizon@freebox.fr>
Patchwork: http://patchwork.linux-mips.org/patch/900/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-04-12 17:26:18 +01:00
Maxime Bizon
97befcf4f0 MIPS: BCM63xx: Fix double gpio registration.
bcm63xx_gpio_init is already called from prom_init to allow board to use
them early, so we can remove the unneeded arch_initcall.

Signed-off-by: Maxime Bizon <mbizon@freebox.fr>
To: linux-mips@linux-mips.org
Cc: Maxime Bizon <mbizon@freebox.fr>
Patchwork: http://patchwork.linux-mips.org/patch/899/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-04-12 17:26:17 +01:00
Florian Fainelli
f29b7cac19 MIPS: BCM63xx: Add DWVS0 board
The DWVS0 board is a BCM6358-based board with an on-board OHCI controler.

Signed-off-by: Florian Fainelli <florian@openwrt.org>
To: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/1015/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-04-12 17:26:17 +01:00
Florian Fainelli
2e6ad9a958 MIPS: BCM63xx: Add the RTA1025W-16 BCM6348-based board to suppported boards.
Signed-off-by: Florian Fainelli <florian@openwrt.org>
To: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/1014/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-04-12 17:26:17 +01:00
Florian Fainelli
d1b28758c6 MIPS: BCM63xx: Fix BCM6338 and BCM6345 gpio count
The number of GPIOs on BCM6338 is 8, while BCM6345 has only 16 GPIOs
available.

Signed-off-by: Florian Fainelli <florian@openwrt.org>
To: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/1016/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-04-12 17:26:16 +01:00
Andrea Gelmini
b44c779ae0 MIPS: libgcc.h: Checkpatch cleanup
arch/mips/lib/libgcc.h:21: ERROR: open brace '{' following union go on the same line

Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
To: linux-kernel@vger.kernel.org
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: linux-mips@linux-mips.org
Cc: linux-sh@vger.kernel.org
Patchwork: http://patchwork.linux-mips.org/patch/1007/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-04-12 17:26:15 +01:00
Wu Zhangjin
f1df323924 MIPS: Loongson-2F: Flush the branch target history in BTB and RAS
As per chapter 15 "Errata: Issue of Out-of-order in loongson"[1] to work
around the Loongson 2F erratum we need to do:

"When switching from user mode to kernel mode, you should flush the
branch target history such as BTB and RAS."

[1] Chinese version: http://www.loongson.cn/uploadfile/file/200808211
[2] English version of chapter 15:
    http://groups.google.com.hk/group/loongson-dev/msg/e0d2e220958f10a6?dmode=source

Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: Shinya Kuribayashi <shinya.kuribayashi@necel.com>
Patchwork: http://patchwork.linux-mips.org/patch/1066/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-04-12 17:26:15 +01:00
David Daney
d814c28cec MIPS: Move signal trampolines off of the stack.
This is a follow on to the vdso patch.

Since all processes now have signal trampolines permanently mapped, we
can use those instead of putting the trampoline on the stack and
invalidating the corresponding icache across all CPUs.  We also get rid
of a bunch of ICACHE_REFILLS_WORKAROUND_WAR code.

[Ralf: GDB 7.1 which has the necessary modifications to allow backtracing
over signal frames will supposedly be released tomorrow.  The old signal
frame format obsoleted by this patch exists in two variations, for sane
processors and for those requiring ICACHE_REFILLS_WORKAROUND_WAR.  So
there was never a GDB which did support backtracing over signal frames
on all MIPS systems.  This convinved me this series should be applied and
pushed upstream as soon as possible.]

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/974/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-04-12 17:26:15 +01:00
David Daney
c52d0d30ae MIPS: Preliminary VDSO
This is a preliminary patch to add a vdso to all user processes.  Still
missing are ELF headers and .eh_frame information.  But it is enough to
allow us to move signal trampolines off of the stack.  Note that emulation
of branch delay slots in the FPU emulator still requires the stack.

We allocate a single page (the vdso) and write all possible signal
trampolines into it.  The stack is moved down by one page and the vdso is
mapped into this space.

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/975/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-04-12 17:26:14 +01:00
David Daney
58b9e2239f MIPS: Add SYSCALL to uasm.
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/976/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-04-12 17:26:14 +01:00
Florian Fainelli
86f7d75eb7 MIPS: make CAC_ADDR and UNCAC_ADDR account for PHYS_OFFSET
On AR7, we already redefine PHYS_OFFSET to match the system specifities, it
is however not sufficient when unsing dma_{map,unmap}_single, specifically
in the ethernet driver, we must also adjust CAC_ADDR and UNCAC_ADDR for DMA
to work correctly. This patch fixes the following issue, seen in cpmac_open:

ops[#1]:
Cpu 0
$ 0   : 00000000 10008400 a0f5b120 00000000
$ 4   : 94c59000 94270f64 00000020 00000010
$ 8   : 00000010 94103ce0 0000000a 94c03400
$12   : ffffffff 94c03408 94c03410 00000001
$16   : a0f5ba20 00000041 94c592c0 94c59200
$20   : 94c59000 000005ee 00002000 9438c8f0
$24   : 00000010 00000000
$28   : 94fac000 94fadd58 94390000 942724a8
Hi    : 00000000
Lo    : 00000001
epc   : 94272518 cpmac_open+0x208/0x3f8
    Not tainted
ra    : 942724a8 cpmac_open+0x198/0x3f8
Status: 10008403    KERNEL EXL IE
Cause : 3080000c
BadVA : 00000000
PrId  : 00018448 (MIPS 4KEc)
Modules linked in:
Process ifconfig (pid: 278, threadinfo=94fac000, task=94e79590, tls=00000000)
Stack : 7f8da120 2ab05cb0 94c59000 943356f0 00000000 943d0000 94c59000 943356f0
        94c59030 943d0000 943c27c0 94fade10 00000000 94fade20 94c59000 9428e5a4
        00000000 94c59000 00000041 94289768 94c59000 00000041 00001002 00001043
        00000000 9428d810 00000000 94fade10 7f8da4e8 9428e6b8 00000000 7f8da4a8
        7f8da4e8 00008914 00000000 942f7f2c 00000000 00000008 00408000 00008913
        ...
Call Trace:
[<94272518>] cpmac_open+0x208/0x3f8
[<9428e5a4>] dev_open+0x164/0x264
[<9428d810>] dev_change_flags+0xd0/0x1bc
[<942f7f2c>] devinet_ioctl+0x2d8/0x908
[<942771f8>] sock_ioctl+0x29c/0x2fc
[<941a0fb4>] vfs_ioctl+0x2c/0x7c
[<941a16ec>] do_vfs_ioctl+0x5dc/0x630
[<941a1790>] sys_ioctl+0x50/0x88
[<94101e10>] stack_done+0x20/0x3c

Signed-off-by: peter fuerst <post@pfrst.de>
Signed-off-by: Florian Fainelli <florian@openwrt.org>
To: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/1050/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-04-12 17:26:13 +01:00
Alexander Clouter
727c0075c8 MIPS: AR7: Fix phat finger of cpmac fixed_phy_add
Seems I trimmed one too many lines in
29ca2d81bd2a62fa86bc9a72ddadcf03d7daf795 (lmo) rsp
7084338eb8 (kernel.org) which led to no
functioning Ethernet on my WAG54Gv2.  This patch restores the AWOL line.

Signed-off-by: Alexander Clouter <alex@digriz.org.uk>
To: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/1065/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-04-12 17:26:13 +01:00
Alexander Clouter
1e3fb3778b MIPS: AR7: Fix phat finger of reset bit in vlynq_high_data
Seems in my whitespace cleanup 0f2536082d01448daeced8d9e82c3ba1751fefa3
(lmo) rsp.  8c2961da46abd85a71d20f2b169bf80618e (kernel.org) caused AR7
to no longer get as far as init.  Fixed my phat fingering.

Signed-off-by: Alexander Clouter <alex@digriz.org.uk>
To: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/1064/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-04-12 17:26:13 +01:00
Wu Zhangjin
582b65e4d3 MIPS: Loongson: Add module info to the loongson2_clock driver
This patch fixes a kernel warning when loading the the loongson2_clock
driver:

"Feb 25 23:42:27 localhost kernel: [    4.965000] loongson2_clock: module
license 'unspecified' taints kernel."

Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Reported-by: Liu Shiwei <liushiwei@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/1045/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-04-12 17:26:12 +01:00
Wu Zhangjin
b846c10da5 MIPS: Lemote 2F: Ensure atomic execution of _rdmsr and _wrmsr
On Lemote 2F CS5536 MSRs are accessed through a index / data register pair.
The access sequence must be protected by a spinlock to be atomic.

Without this rebooting in fs2f_reboot() may fail.

Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: David Daney <ddaney@caviumnetworks.com>
Patchwork: http://patchwork.linux-mips.org/patch/1058/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-04-12 17:26:12 +01:00
Robert P. J. Day
5255366403 MIPS: Initialize an atomic_t properly with ATOMIC_INIT(0).
Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
To: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/1008/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-04-12 17:26:12 +01:00
Ralf Baechle
d5d3102b9a MIPS: Fix elfcore.c build warning
kernel/elfcore.c includes <linux/elf.h> which includes the <asm/elf.h>.  In
<asm/elf.h>, struct pt_regs is declared inside the parameter list of the
elf_dump_regs function which causes a kernel build warning.

Fixed by adding a forward declaration of struct pt_regs.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-04-12 17:26:11 +01:00
Yang Shi
7ea4a6891b MIPS: Octeon: Remove redundant declaration of octeon_reserve32_memory
octeon_reserve32_memory is defined In Octeon's setup.c, so remove the
redundant extern declaration of this variable.

Signed-off-by: Yang Shi <yang.shi@windriver.com>
To: f.fainelli@gmail.com
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/1022/
Acked-by: David Daney <ddaney@caviumnetworks.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-04-12 17:26:10 +01:00
Wu Zhangjin
7a7ac952d5 MIPS: Trace: Don't trace irqsoff for the idle process
Like x86 did in arch/x86/kernel/{process_32.c,process_64.c}, also don't
trace irqsoff for idle.

If there's no useful work to be done, we don't care about the irqsoff
duration. If we trace the idle process, the max duration of irqsoff will
be the idle time and make the irqsoff tracer useless.

Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Patchwork: http://patchwork.linux-mips.org/patch/1044/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-04-12 17:26:10 +01:00
Ralf Baechle
abe5b417fb MIPS: delay: Fix use of current_cpu_data in preemptable code.
This may lead to warnings like:

BUG: using smp_processor_id() in preemptible [00000000] code: reboot/1989
caller is __udelay+0x14/0x70
Call Trace:
[<ffffffff8110ad28>] dump_stack+0x8/0x34
[<ffffffff812dde04>] debug_smp_processor_id+0xf4/0x110
[<ffffffff812d90bc>] __udelay+0x14/0x70
[<ffffffff81378274>] md_notify_reboot+0x12c/0x148
[<ffffffff81161054>] notifier_call_chain+0x64/0xc8
[<ffffffff811614dc>] __blocking_notifier_call_chain+0x64/0xc0
[<ffffffff8115566c>] kernel_restart_prepare+0x1c/0x38
[<ffffffff811556cc>] kernel_restart+0x14/0x50
[<ffffffff8115581c>] SyS_reboot+0x10c/0x1f0
[<ffffffff81103684>] handle_sysn32+0x44/0x84

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-04-12 17:26:09 +01:00
David Daney
b1cea3bab5 MIPS: Octeon: Remove #if 0 code.
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/1029/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-04-12 17:26:09 +01:00
David Daney
1ef2887030 MIPS: Octeon: Remove vestiges of CONFIG_CAVIUM_RESERVE32_USE_WIRED_TLB
The config option CAVIUM_RESERVE32_USE_WIRED_TLB is not supported.
Remove the dead code controlled by it.

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/1028/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-04-12 17:26:09 +01:00
Ralf Baechle
1874a08860 MIPS: Cavium: Remove unused watchdog code.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-04-12 17:26:08 +01:00
Ralf Baechle
c948aca4f4 MIPS: Fix build breakage if CONFIG_DEBUG_FS is enabled.
Caused by 38b7827fcd - no, cpu_local_* was
not unused.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Cc: Christoph Lameter <cl@linux-foundation.org>
Acked-by: David Daney <ddaney@caviumnetworks.com>
2010-04-12 17:26:08 +01:00
Russell King
85b3cce880 ARM: Fix ioremap_cached()/ioremap_wc() for SMP platforms
Write combining/cached device mappings are not setting the shared bit,
which could potentially cause problems on SMP systems since the cache
lines won't participate in the cache coherency protocol.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Tested-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
2010-04-09 15:00:11 +01:00
Martin Schwidefsky
8e7fcccee9 [S390] Update default configuration.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-04-09 13:43:02 +02:00
Heiko Carstens
187644636e [S390] nss: add missing .previous statement to asm function
The savesys_ipl_nss asm function is put into the .init.text section
however it is missing a ".previous" section which would restore the
previous section.
Luckily all functions in early.c are init functions so it doesn't
matter currently.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-04-09 13:43:02 +02:00
Martin Schwidefsky
7d3f661e57 [S390] increase default size of vmalloc area
The default size of the vmalloc area is currently 1 GB. The memory resource
controller uses about 10 MB of vmalloc space per gigabyte of memory. That
turns a system with more than ~100 GB memory unbootable with the default
vmalloc size. It costs us nothing to increase the default size to some
more adequate value, e.g. 128 GB.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-04-09 13:43:02 +02:00
Christian Borntraeger
6af7eea2ae [S390] s390: disable change bit override
commit 6a985c6194
([S390] s390: use change recording override for kernel mapping)
deactivated the change bit recording for the kernel mapping to
improve the performance. This works most of the time, but there
are cases (e.g. kernel runs in home space, futex atomic compare xcmg)
where we modify user memory with the kernel mapping instead of the
user mapping.
Instead of fixing these cases, this patch just deactivates change bit
override to avoid future problems with other kernel code that might
use the kernel mapping for user memory.

CC: stable@kernel.org
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-04-09 13:43:02 +02:00
Martin Schwidefsky
176b1803ce [S390] fix io_return critical section cleanup
If a machine check interrupts the io interrupt handler on one of the
instructions between io_return and io_leave the critical section
cleanup code will move the return psw to io_work_loop. By doing that
the switch from the asynchronous interrupt stack to the process stack
is skipped. If e.g. TIF_NEED_RESCHED is set things break because
the scheduler is called with the asynchronous interrupts stack.
Moving the psw back to io_return instead fixes the problem.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-04-09 13:43:02 +02:00
Julia Lawall
d7015c120e [S390] arch/s390/kernel: Add missing unlock
In the default case the lock is not unlocked.  The return is
converted to a goto, to share the unlock at the end of the function.

A simplified version of the semantic patch that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@r exists@
expression E1;
identifier f;
@@

f (...) { <+...
* spin_lock_irq (E1,...);
... when != E1
* return ...;
...+> }
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-04-09 13:43:01 +02:00
Anders Larsen
9823f1a846 ARM: 6043/1: AT91 slow-clock resume: Don't wait for a disabled PLL to lock
at91 slow-clock resume: Don't wait for a disabled PLL to lock.

We run into this problem with the PLLB on the at91: ohci-at91 disables
the PLLB when going to suspend. The slowclock code however tries to do
the same: It saves the PLLB register value and when restoring the value
during resume, it waits for the PLLB to lock again. However the PLL will
never lock and the loop would run into its timeout because the slowclock
code just stored and restored an empty register.
This fixes the problem by only restoring PLLA/PLLB when they were enabled
at suspend time.

Cc: Andrew Victor <avictor.za@gmail.com>
Signed-off-by: Anders Larsen <al@alarsen.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-04-09 08:31:04 +01:00
Frederic Weisbecker
ab285f2b52 perf: Fix unsafe frame rewinding with hot regs fetching
When we fetch the hot regs and rewind to the nth caller, it
might happen that we dereference a frame pointer outside the
kernel stack boundaries, like in this example:

	perf_trace_sched_switch+0xd5/0x120
        schedule+0x6b5/0x860
        retint_careful+0xd/0x21

Since we directly dereference a userspace frame pointer here while
rewinding behind retint_careful, this may end up in a crash.

Fix this by simply using probe_kernel_address() when we rewind the
frame pointer.

This issue will have a much more proper fix in the next version of the
perf_arch_fetch_caller_regs() API that will only need to rewind to the
first caller.

Reported-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Tested-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: David Miller <davem@davemloft.net>
Cc: Archs <linux-arch@vger.kernel.org>
2010-04-08 19:03:28 +02:00
Bjorn Helgaas
73a0e61458 x86/PCI: ignore Consumer/Producer bit in ACPI window descriptions
ACPI Address Space Descriptors (used in _CRS) have a Consumer/Producer
bit that is supposed to distinguish regions that are consumed directly
by a device from those that are forwarded ("produced") by a bridge.
But BIOSes have apparently not used this consistently, and Windows
seems to ignore it, so I think Linux should ignore it as well.

I can't point to any of these supposed broken BIOSes, but since we
now rely on _CRS by default, I think it's safer to ignore this bit
from the start.

Here are details of my experiments with how Windows handles it:
    https://bugzilla.kernel.org/show_bug.cgi?id=15701

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2010-04-08 09:23:42 -07:00
Russell King
bb3c9d4f85 Merge branch 'for-rmk' of git://git.pengutronix.de/git/imx/linux-2.6
Conflicts:
	arch/arm/mach-mx3/mach-pcm037.c
2010-04-08 10:47:05 +01:00
Linus Torvalds
48de8cb784 Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  perf, x86: Enable Nehalem-EX support
  perf kmem: Fix breakage introduced by 5a0e3ad slab.h script
2010-04-07 14:01:51 -07:00
Rabin Vincent
d4d9959c09 ARM: 6031/1: fix Thumb-2 decompressor
98e12b5a6e ("ARM: Fix decompressor's kernel size estimation for
ROM=y") broke the Thumb-2 decompressor because it added an entry in the
LC0 table but didn't adjust the offset the Thumb-2 code uses to load the
SP from that table.  Fix it.

Cc: stable <stable@kernel.org>
Signed-off-by: Rabin Vincent <rabin@rab.in>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-04-07 21:11:29 +01:00
Hartley Sweeten
4742723cbc ARM: 6029/1: ep93xx: gpio.c: local functions should be static
The functions ep93xx_gpio_update_int_params and ep93xx_gpio_int_mask
are not exported and should be static.  This was overlooked when
moving the code from core.c.

Also, change a comment to better indicate what the code is for.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: Ryan Mallon <ryan@bluewatersys.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-04-07 21:11:28 +01:00
Leo Chen
76708ab839 ARM: 6024/1: bcmring: fix missing down on semaphore in dma.c
Added missing down on the memMap->lock semaphore. Also fixed a return
statement so that we always exit with an up (i.e. early exit via return
is not allowed)

Signed-off-by: Leo Hao Chen <leochen@broadcom.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-04-07 21:11:27 +01:00
Linus Torvalds
63634c8636 Merge branch 'davinci-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux-davinci
* 'davinci-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux-davinci:
  davinci: fix compile warning: <mach/da8xx.h>: #include <linux/platform_device.h>
  davinci: DM365: fix duplicate default IRQ priorities
  davinci: edma: clear events in edma_start()
  davinci: da8xx/omap-l1: fix build error when CONFIG_DAVINCI_MUX is undefined
  davinci: timers: don't enable timer until clocksource is initialized
2010-04-07 11:03:06 -07:00
Linus Torvalds
fb1ae63577 Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-tip:
  x86: Fix double enable_IR_x2apic() call on SMP kernel on !SMP boards
  x86: Increase CONFIG_NODES_SHIFT max to 10
  ibft, x86: Change reserve_ibft_region() to find_ibft_region()
  x86, hpet: Fix bug in RTC emulation
  x86, hpet: Erratum workaround for read after write of HPET comparator
  bootmem, x86: Fix 32bit numa system without RAM on node 0
  nobootmem, x86: Fix 32bit numa system without RAM on node 0
  x86: Handle overlapping mptables
  x86: Make e820_remove_range to handle all covered case
  x86-32, resume: do a global tlb flush in S4 resume
2010-04-07 11:02:23 -07:00
Sergei Shtylyov
75392dd304 davinci: fix compile warning: <mach/da8xx.h>: #include <linux/platform_device.h>
This hushes the following warning:

arch/arm/mach-davinci/include/mach/da8xx.h:104: warning: ‘struct platform_device’
declared inside parameter list
arch/arm/mach-davinci/include/mach/da8xx.h:104: warning: its scope is only this
definition or declaration, which is probably not what you want

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2010-04-07 09:51:58 -07:00
Linus Torvalds
addb2d6c13 Merge branch 'for-linus' of git://git.monstr.eu/linux-2.6-microblaze
* 'for-linus' of git://git.monstr.eu/linux-2.6-microblaze:
  microblaze: Remove unused variable from ptrace
  microblaze: io.h: Add io big-endian function
  microblaze: Enable memory leak detector
  microblaze: Fix futex code
  microblaze: Fix ftrace_update_ftrace_func panic
2010-04-07 08:48:39 -07:00
David Howells
08dc179b9b frv: fix kernel/user segment handling in NOMMU mode
In NOMMU mode, the FRV segment handling is broken because KERNEL_DS ==
USER_DS.  This causes tests of the following sort:

	/* don't pin down non-user-based iovecs */
	if (segment_eq(get_fs(), KERNEL_DS))
		return NULL;

to malfunction.

To fix this, make USER_DS the top of RAM instead of the top of the non-IO
address space, and make KERNEL_DS one more than the top of the non-IO
address space.

Also get rid of FRV's __addr_ok() as nothing uses it.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-04-07 08:38:05 -07:00
Michal Simek
af2b021fd6 microblaze: Remove unused variable from ptrace
Patch b3c1e01a09 should do it.

Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-04-07 15:47:55 +02:00
John Linn
7a325aa26c microblaze: io.h: Add io big-endian function
Add new io big-endian function. They will be used
for uartlite and spi driver.

Signed-off-by: John Linn <john.linn@xilinx.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-04-07 15:47:37 +02:00
Joerg Roedel
4b83873d3d x86/gart: Disable GART explicitly before initialization
If we boot into a crash-kernel the gart might still be
enabled and its caches might be dirty. This can result in
undefined behavior later. Fix it by explicitly disabling the
gart hardware before initialization and flushing the caches
after enablement.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2010-04-07 14:36:30 +02:00
Joerg Roedel
12ff4bf58b Merge branch 'amd-iommu/fixes' into iommu/fixes 2010-04-07 14:36:20 +02:00
Chris Wright
d18c69d389 x86/amd-iommu: use for_each_pci_dev
Replace open coded version with for_each_pci_dev

Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2010-04-07 11:51:34 +02:00
Chris Wright
8f9f55e83e Revert "x86: disable IOMMUs on kernel crash"
This effectively reverts commit 61d047be99.

Disabling the IOMMU can potetially allow DMA transactions to
complete without being translated.  Leave it enabled, and allow
crash kernel to do the IOMMU reinitialization properly.

Cc: stable@kernel.org
Cc: Joerg Roedel <joerg.roedel@amd.com>
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Neil Horman <nhorman@tuxdriver.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2010-04-07 11:51:17 +02:00
Chris Wright
549c90dc9a x86/amd-iommu: warn when issuing command to uninitialized cmd buffer
To catch future potential issues we can add a warning whenever we issue
a command before the command buffer is fully initialized.

Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2010-04-07 11:51:15 +02:00
Chris Wright
75f66533bc x86/amd-iommu: enable iommu before attaching devices
Hit another kdump problem as reported by Neil Horman.  When initializaing
the IOMMU, we attach devices to their domains before the IOMMU is
fully (re)initialized.  Attaching a device will issue some important
invalidations.  In the context of the newly kexec'd kdump kernel, the
IOMMU may have stale cached data from the original kernel.  Because we
do the attach too early, the invalidation commands are placed in the new
command buffer before the IOMMU is updated w/ that buffer.  This leaves
the stale entries in the kdump context and can renders device unusable.
Simply enable the IOMMU before we do the attach.

Cc: stable@kernel.org
Cc: Neil Horman <nhorman@tuxdriver.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2010-04-07 11:50:50 +02:00
Michal Simek
4bb30baa6d microblaze: Fix futex code
Use logical and NOT for ANDN. It was likely type fault.

Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-04-07 07:27:25 +02:00
Steven J. Magnani
d2bf98e6fc microblaze: Fix ftrace_update_ftrace_func panic
The Microblaze dynamic ftrace code assumes a call ordering that is not met
in all scenarios. Specifically, executing a command similar to:

  echo 105 > /sys/kernel/debug/tracing/set_ftrace_pid

before any other tracing-related commands results in a kernel panic:

  BUG: failure at arch/microblaze/kernel/ftrace.c:198/ftrace_update_ftrace_func()!

Recoding ftrace_update_ftrace_func() to use &ftrace_caller directly eliminates
the need to capture its address elsewhere (and thus rely on a particular call
sequence).

Signed-off-by: Steven J. Magnani <steve@digidescorp.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-04-07 07:27:25 +02:00
Vince Weaver
134fbadf02 perf, x86: Enable Nehalem-EX support
According to Intel Software Devel Manual Volume 3B, the
Nehalem-EX PMU is just like regular Nehalem (except for the
uncore support, which is completely different).

Signed-off-by:  Vince Weaver <vweaver1@eecs.utk.edu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Lin Ming <ming.m.lin@intel.com>
LKML-Reference: <alpine.DEB.2.00.1004060956580.1417@cl320.eecs.utk.edu>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-04-06 17:52:59 +02:00
Kevin Hilman
c8e42de6ef davinci: DM365: fix duplicate default IRQ priorities
IRQ 29 has two possible interrupts DDRINT and RTC, but having both in
the default priority table is confusing (and triggers a warning from
sparse.)

This patch removes the lower priority DDRINT from the default priority
table leaving the RTC setting as the default.

Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2010-04-05 15:25:11 -07:00
Brian Niebuhr
bb17ef102b davinci: edma: clear events in edma_start()
This patch fixes an issue where a DMA channel can erroneously process an
event generated by a previous transfer.  A failure case is where DMA is
being used for SPI transmit and receive channels on OMAP L138.  In this
case there is a single bit that controls all event generation from the
SPI peripheral.  Therefore it is possible that between when edma_stop()
has been called for the transmit channel on a previous transfer and
edma_start() is called for the transmit channel on a subsequent transfer,
that a transmit event has been generated.

The fix is to clear events in edma_start().  This prevents false events
from being processed when events are enabled for that channel.

Signed-off-by: Brian Niebuhr <bniebuhr@efjohnson.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2010-04-05 15:25:11 -07:00
Sekhar Nori
5eb2e891f0 davinci: da8xx/omap-l1: fix build error when CONFIG_DAVINCI_MUX is undefined
The da8xx/omap-l1 boards refuse to build when CONFIG_DAVINCI_MUX is undefined
because arch/arm/mach-davinci/mux.c:da8xx_pinmux_setup() is not defined.

This patch fixes this issue. This is build tested with davinci_all_defconfig
and da8xx_omapl_defconfig and boot tested on DA830 EVM.

Reported-by: Shanmuga Sundaram Mahendran <shanmuga@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2010-04-05 15:25:11 -07:00
Kevin Hilman
d99c387114 davinci: timers: don't enable timer until clocksource is initialized
On da830, when the same timer is used for clocksource and clockevent,
the timer can be started before the clockevent is
registered/initialzed.  This creates a window where a timer
interrupt might fire before the clockevent handler has been
setup and causes a crash.

This patch moves the actual enable/start of the timer after
the clockevent has ben registered.

Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2010-04-05 15:25:11 -07:00
Tejun Heo
336f5899d2 Merge branch 'master' into export-slabh 2010-04-05 11:37:28 +09:00
Linus Torvalds
db217dece3 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
  sunxvr500: Ignore secondary output PCI devices.
  sparc64: Implement perf_arch_fetch_caller_regs
  sparc64: Update defconfig.
  sparc64: Fix array size reported by vmemmap_populate()
  sparc: Fix regset register window handling.
  drivers/serial/sunsu.c: Correct use after free
2010-04-04 12:14:44 -07:00
Linus Torvalds
8ce42c8b7f Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  perf: Always build the powerpc perf_arch_fetch_caller_regs version
  perf: Always build the stub perf_arch_fetch_caller_regs version
  perf, probe-finder: Build fix on Debian
  perf/scripts: Tuple was set from long in both branches in python_process_event()
  perf: Fix 'perf sched record' deadlock
  perf, x86: Fix callgraphs of 32-bit processes on 64-bit kernels
  perf, x86: Fix AMD hotplug & constraint initialization
  x86: Move notify_cpu_starting() callback to a later stage
  x86,kgdb: Always initialize the hw breakpoint attribute
  perf: Use hot regs with software sched switch/migrate events
  perf: Correctly align perf event tracing buffer
2010-04-04 12:13:10 -07:00
David S. Miller
954fbc8985 sparc64: Implement perf_arch_fetch_caller_regs
We provide regs->tstate, regs->tpc, regs->tnpc and
regs->u_regs[UREG_FP].

regs->tstate is necessary for:

	user_mode()		(via perf_exclude_event())

	perf_misc_flags()	(via perf_prepare_sample())

regs->tpc is necessary for:

	perf_instruction_pointer() (via perf_prepare_sample())

and regs->u_regs[UREG_FP] is necessary for:

	perf_callchain()	(via perf_prepare_sample())

The regs->tnpc value is provided just to be tidy.

Signed-off-by: David S. Miller <davem@davemloft.net>
2010-04-03 23:50:59 -07:00
David S. Miller
3f6c148df4 sparc64: Update defconfig.
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-04-03 16:18:32 -07:00
David S. Miller
87e8b821ed Merge branch 'master' of /home/davem/src/GIT/linux-2.6/ 2010-04-03 15:49:14 -07:00
Ben Hutchings
33cd9dfa3a sparc64: Fix array size reported by vmemmap_populate()
vmemmap_populate() attempts to report the used index and total size of
vmemmap_table, but it wrongly shifts the total size so that it is
always shown as 0.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-04-03 13:58:45 -07:00
Frederic Weisbecker
6e03bb5ad3 perf: Always build the powerpc perf_arch_fetch_caller_regs version
Now that software events use perf_arch_fetch_caller_regs() too, we
need the powerpc version to be always built.

Fixes the following build error:

	(.text+0x3210): undefined reference to `perf_arch_fetch_caller_regs'
	(.text+0x3324): undefined reference to `perf_arch_fetch_caller_regs'
	(.text+0x33bc): undefined reference to `perf_arch_fetch_caller_regs'
	(.text+0x33ec): undefined reference to `perf_arch_fetch_caller_regs'
	(.text+0xd4a0): undefined reference to `perf_arch_fetch_caller_regs'
	arch/powerpc/kernel/built-in.o:(.text+0xd528): more undefined references to `perf_arch_fetch_caller_regs' follow
	make[1]: *** [.tmp_vmlinux1] Error 1
	make: *** [sub-make] Error 2

Reported-by: Michael Ellerman <michael@ellerman.id.au>
Reported-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
2010-04-03 12:42:00 +02:00
Linus Torvalds
5e11611a5d Merge master.kernel.org:/home/rmk/linux-2.6-arm
* master.kernel.org:/home/rmk/linux-2.6-arm:
  ARM: 5965/1: Fix soft lockup in at91 udc driver
  ARM: 6006/1: ARM: Use the correct NOP size in memmove for Thumb-2 kernel builds
  ARM: 6005/1: arm: kprobes: fix register corruption with jprobes
  ARM: 6003/1: removing compilation warning from pl061.h
  ARM: 6001/1: removing compilation warning comming from clkdev.h
  ARM: 6000/1: removing compilation warning comming from <asm/irq.h>
  ARM: 5999/1: Including device.h and resource.h header files in linux/amba/bus.h
  ARM: 5997/1: ARM: Correct the VFPv3 detection
  ARM: 5996/1: ARM: Change the mandatory barriers implementation (4/4)
  ARM: 5995/1: ARM: Add L2x0 outer_sync() support (3/4)
  ARM: 5994/1: ARM: Add outer_cache_fns.sync function pointer (2/4)
  ARM: 5993/1: ARM: Move the outer_cache definitions into a separate file (1/4)
2010-04-02 19:50:11 -07:00
Linus Torvalds
d4509e5a6e Merge branch 'merge' of git://git.secretlab.ca/git/linux-2.6
* 'merge' of git://git.secretlab.ca/git/linux-2.6:
  powerpc/5200: in lpbfifo, flag DMA irqs as enabled after requesting them
  powerpc/fsl: add device tree binding for QE firmware
  of/flattree: Fix unhandled OF_DT_NOP tag when unflattening the device tree
2010-04-02 19:49:50 -07:00
Suresh Siddha
472a474c66 x86: Fix double enable_IR_x2apic() call on SMP kernel on !SMP boards
Jan Grossmann reported kernel boot panic while booting SMP
kernel on his system with a single core cpu. SMP kernels call
enable_IR_x2apic() from native_smp_prepare_cpus() and on
platforms where the kernel doesn't find SMP configuration we
ended up again calling enable_IR_x2apic() from the
APIC_init_uniprocessor() call in the smp_sanity_check(). Thus
leading to kernel panic.

Don't call enable_IR_x2apic() and default_setup_apic_routing()
from APIC_init_uniprocessor() in CONFIG_SMP case.

NOTE: this kind of non-idempotent and assymetric initialization
sequence is rather fragile and unclean, we'll clean that up
in v2.6.35. This is the minimal fix for v2.6.34.

Reported-by: Jan.Grossmann@kielnet.net
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: <jbarnes@virtuousgeek.org>
Cc: <david.woodhouse@intel.com>
Cc: <weidong.han@intel.com>
Cc: <youquan.song@intel.com>
Cc: <Jan.Grossmann@kielnet.net>
Cc: <stable@kernel.org> # [v2.6.32.x, v2.6.33.x]
LKML-Reference: <1270083887.7835.78.camel@sbs-t61.sc.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-04-02 20:48:47 +02:00
Torok Edwin
257ef9d21f perf, x86: Fix callgraphs of 32-bit processes on 64-bit kernels
When profiling a 32-bit process on a 64-bit kernel, callgraph tracing
stopped after the first function, because it has seen a garbage memory
address (tried to interpret the frame pointer, and return address as a
64-bit pointer).

Fix this by using a struct stack_frame with 32-bit pointers when the
TIF_IA32 flag is set.

Note that TIF_IA32 flag must be used, and not is_compat_task(), because
the latter is only set when the 32-bit process is executing a syscall,
which may not always be the case (when tracing page fault events for
example).

Signed-off-by: Török Edwin <edwintorok@gmail.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: x86@kernel.org
Cc: linux-kernel@vger.kernel.org
LKML-Reference: <1268820436-13145-1-git-send-email-edwintorok@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-04-02 19:30:03 +02:00
Peter Zijlstra
b38b24ead3 perf, x86: Fix AMD hotplug & constraint initialization
Commit 3f6da39 ("perf: Rework and fix the arch CPU-hotplug hooks") moved
the amd northbridge allocation from CPUS_ONLINE to CPUS_PREPARE_UP
however amd_nb_id() doesn't work yet on prepare so it would simply bail
basically reverting to a state where we do not properly track node wide
constraints - causing weird perf results.

Fix up the AMD NorthBridge initialization code by allocating from
CPU_UP_PREPARE and installing it from CPU_STARTING once we have the
proper nb_id. It also properly deals with the allocation failing.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
[ robustify using amd_has_nb() ]
Signed-off-by: Stephane Eranian <eranian@google.com>
LKML-Reference: <1269353485.5109.48.camel@twins>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-04-02 19:30:02 +02:00
Peter Zijlstra
8525702409 x86: Move notify_cpu_starting() callback to a later stage
Because we need to have cpu identification things done by the time we run
CPU_STARTING notifiers.

( This init ordering will be relied on by the next fix. )

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1269353485.5109.48.camel@twins>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-04-02 19:30:01 +02:00
Ingo Molnar
50d11d190a Merge branch 'perf/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing into perf/urgent 2010-04-02 19:29:17 +02:00
David Rientjes
51591e31dc x86: Increase CONFIG_NODES_SHIFT max to 10
Some larger systems require more than 512 nodes, so increase the
maximum CONFIG_NODES_SHIFT to 10 for a new max of 1024 nodes.

This was tested with numa=fake=64M on systems with more than
64GB of RAM. A total of 1022 nodes were initialized.

Successfully builds with no additional warnings on x86_64
allyesconfig.

( No effect on any existing config. Newly enabled CONFIG_MAXSMP=y
  will see the new default. )

Signed-off-by: David Rientjes <rientjes@google.com>
LKML-Reference: <alpine.DEB.2.00.1003251538060.8589@chino.kir.corp.google.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-04-02 19:09:31 +02:00
Linus Torvalds
bc53ba2918 Merge branch 'sh/for-2.6.34' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6
* 'sh/for-2.6.34' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6:
  sh: Fix up the SH-3 build for recent TLB changes.
  sh: export return_address() symbol.
  sh: Enable the mmu in start_secondary()
  sh: Fix FDPIC binary loader
  arch/sh/kernel: Use set_cpus_allowed_ptr
  sh: Update ecovec_defconfig
  USB gadget r8a66597-udc.c: duplicated include
  sh: update the TLB replacement counter for entry wiring.
2010-04-02 07:33:38 -07:00
Paul Mundt
be97d758e5 sh: Fix up the SH-3 build for recent TLB changes.
While the MMUCR.URB and ITLB/UTLB differentiation works fine for all SH-4
and later TLBs, these features are absent on SH-3. This splits out
local_flush_tlb_all() in to SH-4 and PTEAEX copies while restoring the
old SH-3 one, subsequently fixing up the build.

This will probably want some further reordering and tidying in the
future, but that's out of scope at present.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-04-02 16:13:27 +09:00
Paul Mundt
5dd6ef5050 sh: export return_address() symbol.
This is needed with some of the tracing code built as modules, so provide
the export.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-04-02 16:02:33 +09:00
Yinghai Lu
042be38e61 ibft, x86: Change reserve_ibft_region() to find_ibft_region()
This allows arch code could decide the way to reserve the ibft.

And we should reserve ibft as early as possible, instead of BOOTMEM
stage, in case the table is in RAM range and is not reserved by BIOS
(this will often be the case.)

Move to just after find_smp_config().

Also when CONFIG_NO_BOOTMEM=y, We will not have reserve_bootmem() anymore.

-v2: fix typo about ibft pointed by Konrad Rzeszutek Wilk <konrad@darnok.org>

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
LKML-Reference: <4BB510FB.80601@kernel.org>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Peter Jones <pjones@redhat.com>
Cc: Konrad Rzeszutek Wilk <konrad@kernel.org>
CC: Jan Beulich <jbeulich@novell.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2010-04-01 16:12:48 -07:00
Alok Kataria
b4a5e8a1de x86, hpet: Fix bug in RTC emulation
We think there exists a bug in the HPET code that emulates the RTC.

In the normal case, when the RTC frequency is set, the rtc driver tells
the hpet code about it here:

int hpet_set_periodic_freq(unsigned long freq)
{
        uint64_t clc;

        if (!is_hpet_enabled())
                return 0;

        if (freq <= DEFAULT_RTC_INT_FREQ)
                hpet_pie_limit = DEFAULT_RTC_INT_FREQ / freq;
        else {
                clc = (uint64_t) hpet_clockevent.mult * NSEC_PER_SEC;
                do_div(clc, freq);
                clc >>= hpet_clockevent.shift;
                hpet_pie_delta = (unsigned long) clc;
        }
        return 1;
}

If freq is set to 64Hz (DEFAULT_RTC_INT_FREQ) or lower, then
hpet_pie_limit (a static) is set to non-zero.  Then, on every one-shot
HPET interrupt, hpet_rtc_timer_reinit is called to compute the next
timeout.  Well, that function has this logic:

        if (!(hpet_rtc_flags & RTC_PIE) || hpet_pie_limit)
                delta = hpet_default_delta;
        else
                delta = hpet_pie_delta;

Since hpet_pie_limit is not 0, hpet_default_delta is used.  That
corresponds to 64Hz.

Now, if you set a different rtc frequency, you'll take the else path
through hpet_set_periodic_freq, but unfortunately no one resets
hpet_pie_limit back to 0.

Boom....now you are stuck with 64Hz RTC interrupts forever.

The patch below just resets the hpet_pie_limit value when requested freq
is greater than DEFAULT_RTC_INT_FREQ, which we think fixes this problem.

Signed-off-by: Alok N Kataria <akataria@vmware.com>
LKML-Reference: <201003112200.o2BM0Hre012875@imap1.linux-foundation.org>
Signed-off-by: Daniel Hecht <dhecht@vmware.com>
Cc: Venkatesh Pallipadi <venkatesh.pallipadi@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2010-04-01 15:21:48 -07:00
Pallipadi, Venkatesh
8da854cb02 x86, hpet: Erratum workaround for read after write of HPET comparator
On Wed, Feb 24, 2010 at 03:37:04PM -0800, Justin Piszcz wrote:
> Hello,
>
> Again, on the Intel DP55KG board:
>
> # uname -a
> Linux host 2.6.33 #1 SMP Wed Feb 24 18:31:00 EST 2010 x86_64 GNU/Linux
>
> [    1.237600] ------------[ cut here ]------------
> [    1.237890] WARNING: at arch/x86/kernel/hpet.c:404 hpet_next_event+0x70/0x80()
> [    1.238221] Hardware name:
> [    1.238504] hpet: compare register read back failed.
> [    1.238793] Modules linked in:
> [    1.239315] Pid: 0, comm: swapper Not tainted 2.6.33 #1
> [    1.239605] Call Trace:
> [    1.239886]  <IRQ>  [<ffffffff81056c13>] ? warn_slowpath_common+0x73/0xb0
> [    1.240409]  [<ffffffff81079608>] ? tick_dev_program_event+0x38/0xc0
> [    1.240699]  [<ffffffff81056cb0>] ? warn_slowpath_fmt+0x40/0x50
> [    1.240992]  [<ffffffff81079608>] ? tick_dev_program_event+0x38/0xc0
> [    1.241281]  [<ffffffff81041ad0>] ? hpet_next_event+0x70/0x80
> [    1.241573]  [<ffffffff81079608>] ? tick_dev_program_event+0x38/0xc0
> [    1.241859]  [<ffffffff81078e32>] ? tick_handle_oneshot_broadcast+0xe2/0x100
> [    1.246533]  [<ffffffff8102a67a>] ? timer_interrupt+0x1a/0x30
> [    1.246826]  [<ffffffff81085499>] ? handle_IRQ_event+0x39/0xd0
> [    1.247118]  [<ffffffff81087368>] ? handle_edge_irq+0xb8/0x160
> [    1.247407]  [<ffffffff81029f55>] ? handle_irq+0x15/0x20
> [    1.247689]  [<ffffffff810294a2>] ? do_IRQ+0x62/0xe0
> [    1.247976]  [<ffffffff8146be53>] ? ret_from_intr+0x0/0xa
> [    1.248262]  <EOI>  [<ffffffff8102f277>] ? mwait_idle+0x57/0x80
> [    1.248796]  [<ffffffff8102645c>] ? cpu_idle+0x5c/0xb0
> [    1.249080] ---[ end trace db7f668fb6fef4e1 ]---
>
> Is this something Intel has to fix or is it a bug in the kernel?

This is a chipset erratum.

Thomas: You mentioned we can retain this check only for known-buggy and
hpet debug kind of options. But here is the simple workaround patch for
this particular erratum.

Some chipsets have a erratum due to which read immediately following a
write of HPET comparator returns old comparator value instead of most
recently written value.

Erratum 15 in
"Intel I/O Controller Hub 9 (ICH9) Family Specification Update"
(http://www.intel.com/assets/pdf/specupdate/316973.pdf)

Workaround for the errata is to read the comparator twice if the first
one fails.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
LKML-Reference: <20100225185348.GA9674@linux-os.sc.intel.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Cc: Venkatesh Pallipadi <venkatesh.pallipadi@gmail.com>
Cc: <stable@kernel.org>
2010-04-01 15:21:47 -07:00
Andi Kleen
909fc87b32 x86: Handle overlapping mptables
We found a system where the MP table MPC and MPF structures overlap.

That doesn't really matter because the mptable is not used anyways with ACPI,
but it leads to a panic in the early allocator due to the overlapping
reservations in 2.6.33.

Earlier kernels handled this without problems.

Simply change these reservations to reserve_early_overlap_ok to avoid
the panic.

Reported-by: Thomas Renninger <trenn@suse.de>
Tested-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
LKML-Reference: <20100329074111.GA22821@basil.fritz.box>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Cc: <stable@kernel.org>
2010-04-01 13:31:07 -07:00
Michal Simek
ca3865bae5 microblaze: Support word copying in copy_tofrom_user
Word copying is used only for aligned addresses.
Here is space for improving to use any better copying technique.
Look at memcpy implementation.

Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-04-01 08:38:25 +02:00
Michal Simek
6059b3cbeb microblaze: Print early printk information to log buffer
If early printk console is not enabled then all messages
are written to log buffer.

Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-04-01 08:38:25 +02:00
Michal Simek
3f21893586 microblaze: head.S typo fix
I forget to change register name in comments.

Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-04-01 08:38:24 +02:00
Michal Simek
0691c97d74 microblaze: Use MICROBLAZE_TLB_SIZE in asm code
TLB size was hardcoded in asm code. This patch brings ability
to change TLB size only in one place. (mmu.h).

Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-04-01 08:38:24 +02:00
Michal Simek
9373dd6ab1 microblaze: Kconfig Fix - pci
I forget to remove pci Kconfig option.

Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-04-01 08:38:24 +02:00
Michal Simek
78ebfa884b microblaze: Adding likely macros
On the base on GCOV analytics is helpful to add likely/unlikely
macros.

Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-04-01 08:38:24 +02:00
Michal Simek
13851966da microblaze: Add .type and .size to ASM functions
Cachegrind analysis need this fix to be able to log asm functions.

Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-04-01 08:38:24 +02:00
Michal Simek
e84452dd9f microblaze: Fix TLB macros
To be able to do trace TLB operations.

Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-04-01 08:38:24 +02:00
Michal Simek
3765d6958d microblaze: Use instruction with delay slot
Sync labels.

Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-04-01 08:38:23 +02:00
Michal Simek
bd1637d63e microblaze: Remove additional resr and rear loading
RESR and REAR uses the same regs in whole file.

Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-04-01 08:38:23 +02:00
Michal Simek
b175bcfe31 microblaze: Change register usage for ESR and EAR
This change synchronize register usage in code.
ESR = R4
EAR = R3

Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-04-01 08:38:23 +02:00
Michal Simek
7a6bbdc930 microblaze: Prepare work for optimization in exception code
Any sync branch must follow mts instructions not mfs.

Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-04-01 08:38:23 +02:00
Michal Simek
708e7153d6 microblaze: Add DEBUG option
Disable debug option in asm code.

Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-04-01 08:38:23 +02:00
Michal Simek
ee68f1745e microblaze: Support systems without lmb bram
When the system has no lmb bram, main memory should be start from
zero because of microblaze vectors.

DTS fragment could look like:
	DDR2_SDRAM: memory@0 {
		device_type = "memory";
		reg = < 0x0 0x10000000 >;
	} ;

Then you have to setup CONFIG_KERNEL_BASE_ADDR=0 which caused
that kernel physical start address will be zero. On reset vector place
will be jump to 0x100 and on 0x100 starts kernel text.

You have to solve how to load the kernel before cpu starts.
Tested with XMD.

Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-04-01 08:38:23 +02:00
Michal Simek
89ae9753ae microblaze: uaccess: Sync strlen, strnlen, copy_to/from_user
Last sync.

Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-04-01 08:38:23 +02:00
Michal Simek
94804a9b3d microblaze: uaccess: Unify __copy_tofrom_user
Move to generic location.

Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-04-01 08:38:22 +02:00
Michal Simek
cca79120c2 microblaze: uaccess: Move functions to generic location
noMMU and MMU use them.

Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-04-01 08:38:22 +02:00
Michal Simek
ef4e277b5d microblaze: uaccess: Fix put_user for noMMU
Here is small regression on dhrystone tests and I think
that on all benchmarking tests. It is due to better checking
mechanism in put_user macro

Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-04-01 08:38:22 +02:00
Michal Simek
3a6d77245e microblaze: uaccess: Fix get_user macro for noMMU
Use unified version.

Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-04-01 08:38:22 +02:00
Michal Simek
527bdb52d5 microblaze: uaccess: fix clear_user for noMMU kernel
Previous patches fixed only MMU version and this is the first
patch for noMMU kernel

Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-04-01 08:38:21 +02:00
Michal Simek
40e11e3380 microblaze: uaccess: Fix strncpy_from_user function
Generic implementation for noMMU and MMU version

Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-04-01 08:38:21 +02:00
Michal Simek
4270690bd4 microblaze: uaccess: fix copy_from_user macro
copy_from_user macro also use copy_tofrom_user function

Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-04-01 08:38:21 +02:00
Michal Simek
cc5a428b7a microblaze: uaccess: copy_to_user unification
noMMU and MMU kernel will use copy copy_tofrom_user
asm implementation.

Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-04-01 08:38:20 +02:00
Michal Simek
0dcb409de7 microblaze: uaccess: sync put/get/clear_user macros
Add macro description and resort.

Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-04-01 08:38:20 +02:00
Michal Simek
8b651aa4a7 microblaze: uaccess: fix put_user and get_user macros
Use FIXUP macros and resort them.

Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-04-01 08:38:20 +02:00
Michal Simek
c77a9c4bb7 microblaze: uaccess: fix __get_user_asm macro
It is used __FIXUP_SECTION and __EX_TABLE_SECTION macros.

Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-04-01 08:38:20 +02:00
Michal Simek
40b1156db0 microblaze: uaccess: fix clean user macro
This is the first patch which does uaccess unification.
I choosed to do several patches to be able to use bisect
in future if any fault happens.

Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-04-01 08:38:20 +02:00
Michal Simek
60a729f7bb microblaze: move noMMU __range_ok function to uaccess.h
The same noMMU and MMU functions should be placed in
one file.

Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-04-01 08:38:20 +02:00
Michal Simek
357bc3c928 microblaze: Move exception_table_entry upward
Just sort to be able remove whole block.

Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-04-01 08:38:19 +02:00
Michal Simek
40db083433 microblaze: Remove segment.h
I would like to use asm-generic uaccess.h where are segment
macros defined. This is just first step.

Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-04-01 08:38:19 +02:00
Michal Simek
4009819cf9 microblaze: Remove memset in free_init_pages
We don't need to do it.

Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-04-01 08:38:19 +02:00
Arun Bhanu
6fa114e0f1 microblaze: Makefile cleanups
If CONFIG_INITRAMFS_SOURCE is set, "scripts/gen_initramfs_list.sh"
checks if the cpio image exists. Remove the duplicate check from the
Makefile.

Remove the "clean-kernel" variable which is unused in the Makefile and
is not used by the Kbuild.

Signed-off-by: Arun Bhanu <arun@bhanu.net>
Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-04-01 08:38:19 +02:00
Arun Bhanu
8a8804f1ab microblaze: Fix Makefile to delete build generated files
'make clean' does not to delete the following build generated file:
	arch/microblaze/boot/linux.bin.ub

'make mrproper' does not to delete the following build generated files:
	arch/microblaze/boot/simpleImage.*

Fix the Makefile to delete these build generated files.

See [1] for a discussion on why simpleImage.* files are deleted with 'make
mrproper' and not with 'make clean'.
	[1] http://lkml.org/lkml/2010/3/12/96

Signed-off-by: Arun Bhanu <arun@bhanu.net>
Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-04-01 08:38:19 +02:00
Arun Bhanu
699d17bc14 microblaze: Add a missing single quote to make 'make help' happy
'make ARCH=microblaze help' fails with the following error due to a
missing single quote.

/bin/sh: -c: line 0: unexpected EOF while looking for matching `''
/bin/sh: -c: line 1: syntax error: unexpected end of file
make: *** [help] Error 2

Signed-off-by: Arun Bhanu <arun@bhanu.net>
Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-04-01 08:38:19 +02:00
Steven J. Magnani
0c4ec16b86 microblaze: Fix "kstack=" parsing
The "kstack=" command line parameter is not parsed correctly.
All proper values are interpreted as zero.

Signed-off-by: Steven J. Magnani <steve@digidescorp.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-04-01 08:38:18 +02:00
Jason Wessel
ab310b5edb x86,kgdb: Always initialize the hw breakpoint attribute
It is required to call hw_breakpoint_init() on an attr before using it
in any other calls.  This fixes the problem where kgdb will sometimes
fail to initialize on x86_64.

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: 2.6.33 <stable@kernel.org>
LKML-Reference: <1269975907-27602-1-git-send-email-jason.wessel@windriver.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
2010-04-01 08:26:32 +02:00
Frederic Weisbecker
e49a5bd381 perf: Use hot regs with software sched switch/migrate events
Scheduler's task migration events don't work because they always
pass NULL regs perf_sw_event(). The event hence gets filtered
in perf_swevent_add().

Scheduler's context switches events use task_pt_regs() to get
the context when the event occured which is a wrong thing to
do as this won't give us the place in the kernel where we went
to sleep but the place where we left userspace. The result is
even more wrong if we switch from a kernel thread.

Use the hot regs snapshot for both events as they belong to the
non-interrupt/exception based events family. Unlike page faults
or so that provide the regs matching the exact origin of the event,
we need to save the current context.

This makes the task migration event working and fix the context
switch callchains and origin ip.

Example: perf record -a -e cs

Before:

    10.91%      ksoftirqd/0                  0  [k] 0000000000000000
                |
                --- (nil)
                    perf_callchain
                    perf_prepare_sample
                    __perf_event_overflow
                    perf_swevent_overflow
                    perf_swevent_add
                    perf_swevent_ctx_event
                    do_perf_sw_event
                    __perf_sw_event
                    perf_event_task_sched_out
                    schedule
                    run_ksoftirqd
                    kthread
                    kernel_thread_helper

After:

    23.77%  hald-addon-stor  [kernel.kallsyms]  [k] schedule
            |
            --- schedule
               |
               |--60.00%-- schedule_timeout
               |          wait_for_common
               |          wait_for_completion
               |          blk_execute_rq
               |          scsi_execute
               |          scsi_execute_req
               |          sr_test_unit_ready
               |          |
               |          |--66.67%-- sr_media_change
               |          |          media_changed
               |          |          cdrom_media_changed
               |          |          sr_block_media_changed
               |          |          check_disk_change
               |          |          cdrom_open

v2: Always build perf_arch_fetch_caller_regs() now that software
events need that too. They don't need it from modules, unlike trace
events, so we keep the EXPORT_SYMBOL in trace_event_perf.c

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: David Miller <davem@davemloft.net>
2010-04-01 08:26:31 +02:00
David S. Miller
b857bd2922 sparc: Fix regset register window handling.
We have to adjust 'reg_window' down by 16 becuase the 'pos' iterator
we'll use to index into the stack slots will be between 16 and 32.

Signed-off-by: David S. Miller <davem@davemloft.net>
2010-03-31 18:05:05 -07:00
Yinghai Lu
9f3a5f52aa x86: Make e820_remove_range to handle all covered case
Rusty found on lguest with trim_bios_range, max_pfn is not right anymore, and
looks e820_remove_range does not work right.

[    0.000000] BIOS-provided physical RAM map:
[    0.000000]  LGUEST: 0000000000000000 - 0000000004000000 (usable)
[    0.000000] Notice: NX (Execute Disable) protection missing in CPU or disabled in BIOS!
[    0.000000] DMI not present or invalid.
[    0.000000] last_pfn = 0x3fa0 max_arch_pfn = 0x100000
[    0.000000] init_memory_mapping: 0000000000000000-0000000003fa0000

root cause is: the e820_remove_range doesn't handle the all covered
case.  e820_remove_range(BIOS_START, BIOS_END - BIOS_START, ...)
produces a bogus range as a result.

Make it match e820_update_range() by handling that case too.

Reported-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Tested-by: Rusty Russell <rusty@rustcorp.com.au>
LKML-Reference: <4BB18E55.6090903@kernel.org>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2010-03-31 17:40:57 -07:00
Ranjith Lohithakshan
d54a45e253 OMAP3: clock: fix enable bit used for dpll4_m4x2 clock
The enable bit for dpll4_m4x2 clock should be OMAP3430_PWRDN_DSS1_SHIFT.
The code erroneously uses OMAP3430_PWRDN_CAM_SHIFT which is meant for
dpll4_m5x2 clock.

This came into notice during a recent review of the clock tree.

Signed-off-by: Ranjith Lohithakshan <ranjithl@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
2010-03-31 04:16:30 -06:00
Rajendra Nayak
766d305fea OMAP4: prcm: Use logical OR instead of bitwise OR
This patch fixes usage of bitwise OR in if conditions, and instead
uses logical OR.

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Cc: Abhijit Pagare <abhijitpagare@ti.com>
Cc: Tony Lindgren <tony@atomide.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
2010-03-31 04:16:30 -06:00
Thara Gopinath
56dc79aba1 OMAP: HWMOD: Bug fixes in hwmod structure definitions
This patch corrects the width of sysc_flags in hwmod sysconfig structure
where the values to be stored to this variable exceed the current
field width.

Signed-off-by: Thara Gopinath <thara@ti.com>
[paul@pwsan.com: edited to apply; rearranged structure members to pack]
Signed-off-by: Paul Walmsley <paul@pwsan.com>
2010-03-31 04:16:29 -06:00
Thara Gopinath
d5647c18ea OMAP: HWMOD: Adding clockdomain check
This patch adds check for presence of clockdomain structure in the API
omap_hwmod_get_pwrdm before trying to access the powerdomain structure.
This will prevent unnecessary crashing of the system in case of a
clock node with out an associated clockdomain.

Signed-off-by: Thara Gopinath <thara@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
2010-03-31 04:16:29 -06:00
Shaohua Li
8ae06d223f x86-32, resume: do a global tlb flush in S4 resume
Colin King reported a strange oops in S4 resume code path (see below). The test
system has i5/i7 CPU. The kernel doesn't open PAE, so 4M page table is used.
The oops always happen a virtual address 0xc03ff000, which is mapped to the
last 4k of first 4M memory. Doing a global tlb flush fixes the issue.

EIP: 0060:[<c0493a01>] EFLAGS: 00010086 CPU: 0
EIP is at copy_loop+0xe/0x15
EAX: 36aeb000 EBX: 00000000 ECX: 00000400 EDX: f55ad46c
ESI: 0f800000 EDI: c03ff000 EBP: f67fbec4 ESP: f67fbea8
DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
...
...
CR2: 00000000c03ff000

Tested-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Shaohua Li <shaohua.li@intel.com>
LKML-Reference: <20100305005932.GA22675@sli10-desk.sh.intel.com>
Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Cc: <stable@kernel.org>
2010-03-30 11:46:02 -07:00
Linus Torvalds
be3fd3cc7c Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: Do not free zero sized per cpu areas
  x86: Make sure free_init_pages() frees pages on page boundary
  x86: Make smp_locks end with page alignment
2010-03-30 07:22:38 -07:00
Tejun Heo
5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00
Tejun Heo
57f4c226d1 x86: don't include slab.h from arch/x86/include/asm/pgtable_32.h
Including slab.h from x86 pgtable_32.h creates a troublesome
dependency chain w/ ftrace enabled.  The following chain leads to
inclusion of pgtable_32.h from define_trace.h.

 trace/define_trace.h
 trace/ftrace.h
 linux/ftrace_event.h
 linux/ring_buffer.h
 linux/mm.h
 asm/pgtable.h
 asm/pgtable_32.h

slab.h itself defines trace hooks via

 linux/sl[aou]b_def.h
 linux/kmemtrace.h
 trace/events/kmem.h

If slab.h is not included before define_trace.h is included, this
leads to duplicate definitions of kmemtrace hooks or other include
dependency problems.

pgtable_32.h doesn't need slab.h to begin with.  Don't include it from
there.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Acked-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: H. Peter Anvin <hpa@zytor.com>
2010-03-30 22:02:21 +09:00
Alberto Panizzo
b3aa111f7a MXC: mach_armadillo5x0: Add USB Host support.
This add USB Host capability. The Armadillo 500 board is supplied
with two USB Host connectors driven by the USB OTG and USB Host 2
ports, through two NXP isp 1504 transceivers.

Signed-off-by: Alberto Panizzo <maramaopercheseimorto@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2010-03-30 14:25:03 +02:00
Andrea Gelmini
17669fd60e ARM mach-mx3: duplicated include
arch/arm/mach-mx3/mx31lite-db.c: linux/platform_device.h is included more than once.

Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2010-03-30 14:22:58 +02:00
Andrea Gelmini
034cf2362a ARM mach-mx3: duplicated include
arch/arm/mach-mx3/mach-pcm037.c: linux/fsl_devices.h is included more than once.

Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2010-03-30 14:22:58 +02:00
Vladimir Zapolskiy
7d7a77e567 imx31: add watchdog device on litekit board.
This patch adds support for SoC build-in watchdog device on litekit
board.

Signed-off-by: Vladimir Zapolskiy <vzapolskiy@gmail.com>
Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2010-03-30 14:21:12 +02:00
Vladimir Zapolskiy
a7dc12ba75 imx3: Add watchdog platform device support
This patch adds support for build-in watchdog device found on
Freescale imx31 and imx35 SoCs.

Signed-off-by: Vladimir Zapolskiy <vzapolskiy@gmail.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2010-03-30 14:21:12 +02:00
Linus Torvalds
c45140a996 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
  sparc64: Properly truncate pt_regs framepointer in perf callback.
  arch/sparc/kernel: Use set_cpus_allowed_ptr
  sparc: Fix use of uid16_t and gid16_t in asm/stat.h
2010-03-29 14:41:00 -07:00
David S. Miller
9e8307ecaf sparc64: Properly truncate pt_regs framepointer in perf callback.
For 32-bit processes, we save the full 64-bits of the regs in pt_regs.

But unlike when the userspace actually does load and store
instructions, the top 32-bits don't get automatically truncated by the
cpu in kernel mode (because the kernel doesn't execute with PSTATE_AM
address masking enabled).

So we have to do it by hand.

Reported-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-03-29 13:08:52 -07:00
Yinghai Lu
c967da6a0b x86: Make sure free_init_pages() frees pages on page boundary
When CONFIG_NO_BOOTMEM=y, it could use memory more effiently, or
in a more compact fashion.

Example:

 Allocated new RAMDISK: 00ec2000 - 0248ce57
 Move RAMDISK from 000000002ea04000 - 000000002ffcee56 to 00ec2000 - 0248ce56

The new RAMDISK's end is not page aligned.
Last page could be shared with other users.

When free_init_pages are called for initrd or .init, the page
could be freed and we could corrupt other data.

code segment in free_init_pages():

 |        for (; addr < end; addr += PAGE_SIZE) {
 |                ClearPageReserved(virt_to_page(addr));
 |                init_page_count(virt_to_page(addr));
 |                memset((void *)(addr & ~(PAGE_SIZE-1)),
 |                        POISON_FREE_INITMEM, PAGE_SIZE);
 |                free_page(addr);
 |                totalram_pages++;
 |        }

last half page could be used as one whole free page.

So page align the boundaries.

-v2: make the original initramdisk to be aligned, according to
     Johannes, otherwise we have the chance to lose one page.
     we still need to keep initrd_end not aligned, otherwise it could
     confuse decompressor.
-v3: change to WARN_ON instead, suggested by Johannes.
-v4: use PAGE_ALIGN, suggested by Johannes.
     We may fix that macro name later to PAGE_ALIGN_UP, and PAGE_ALIGN_DOWN
     Add comments about assuming ramdisk start is aligned
     in relocate_initrd(), change to re get ramdisk_image instead of save it
     to make diff smaller. Add warning for wrong range, suggested by Johannes.
-v6: remove one WARN()
     We need to align beginning in free_init_pages()
     do not copy more than ramdisk_size, noticed by Johannes

Reported-by: Stanislaw Gruszka <sgruszka@redhat.com>
Tested-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: David Miller <davem@davemloft.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <1269830604-26214-3-git-send-email-yinghai@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-03-29 18:55:33 +02:00
Yinghai Lu
596b711ed6 x86: Make smp_locks end with page alignment
Fix:

 ------------[ cut here ]------------
 WARNING: at arch/x86/mm/init.c:342 free_init_pages+0x4c/0xfa()
 free_init_pages: range [0x40daf000, 0x40db5c24] is not aligned
 Modules linked in:
 Pid: 0, comm: swapper Not tainted
 2.6.34-rc2-tip-03946-g4f16b23-dirty #50 Call Trace:
  [<40232e9f>] warn_slowpath_common+0x65/0x7c
  [<4021c9f0>] ? free_init_pages+0x4c/0xfa
  [<40881434>] ? _etext+0x0/0x24
  [<40232eea>] warn_slowpath_fmt+0x24/0x27
  [<4021c9f0>] free_init_pages+0x4c/0xfa
  [<40881434>] ? _etext+0x0/0x24
  [<40d3f4bd>] alternative_instructions+0xf6/0x100
  [<40d3fe4f>] check_bugs+0xbd/0xbf
  [<40d398a7>] start_kernel+0x2d5/0x2e4
  [<40d390ce>] i386_start_kernel+0xce/0xd5
 ---[ end trace 4eaa2a86a8e2da22 ]---

Comments in vmlinux.lds.S already said:

 |        /*
 |         * smp_locks might be freed after init
 |         * start/end must be page aligned
 |         */

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: David Miller <davem@davemloft.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <1269830604-26214-2-git-send-email-yinghai@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-03-29 18:42:30 +02:00
David Howells
f7454c5d5c frv/chris: fix lines with a missing semicolons
Commit b26b2d494b ("resource/PCI: align functions now return start
of resource") added lines with missing semicolons.

Add the missing semicolons to the FRV and CRIS arch code.

Signed-off-by: David Howells <dhowells@redhat.com>
Cc: linux@dominikbrodowski.net
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-29 09:37:14 -07:00
Catalin Marinas
fd522a8dec ARM: 6006/1: ARM: Use the correct NOP size in memmove for Thumb-2 kernel builds
When compiling the kernel to Thumb-2, using a 16-bit NOP in the
memmove() implementation causes the preceding ADD PC instruction to
branch incorrectly in the middle of a 32-bit LDR or STR instruction. The
memmove() code is now similar to the memcpy() template.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-03-29 17:33:33 +01:00
Mika Westerberg
782a0fd167 ARM: 6005/1: arm: kprobes: fix register corruption with jprobes
Current implementation of jprobes allocates empty pt_regs from the
stack which is then passed to kprobe_handler() and eventually to
singlestep().  Now when instruction being simulated is STMFD (like
in normal function prologues without CONFIG_FRAME_POINTER), stores
using SP actually write over top of the fabricated pt_regs
structure.

This can be reproduced for example by using LKDTM module:
    # modprobe lkdtm
    # mount -t debugfs none /sys/kernel/debug
    # echo PANIC > /sys/kernel/debug/provoke-crash/INT_HW_IRQ_EN

after this, it fails with corrupted registers (before the requested crash would occur):

lkdtm: Crash point INT_HW_IRQ_EN of type PANIC hit, trigger in 9 rounds
lkdtm: Crash point INT_HW_IRQ_EN of type PANIC hit, trigger in 8 rounds
Internal error: Oops - undefined instruction: 0 [#1]
last sysfs file: /sys/devices/platform/serial8250.0/sleep_timeout
Modules linked in: lkdtm
CPU: 0    Not tainted  (2.6.34-rc2 #69)
PC is at irq_desc+0x1638/0xeeb0
LR is at 0x25
pc : [<c050b428>]    lr : [<00000025>]    psr: c80a0013
sp : ce94bd60  ip : c050b3e8  fp : a0000013
r10: c0aa453c  r9 : cf5d4000  r8 : ce9a1822
r7 : c050b424  r6 : 00000025  r5 : c039d8f8  r4 : c050b3e8
r3 : 00000001  r2 : cf4d0440  r1 : c039d8f8  r0 : 00000020
Flags: NZcv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user
Control: 10c5387d  Table: 8e804019  DAC: 00000015
Process sh (pid: 496, stack limit = 0xce94a2e8)
Stack: (0xce94bd60 to 0xce94c000)
[...]
Code: 000002cd 00000000 00000000 00000001 (dead4ead)
---[ end trace 2b46d5f2b682f370 ]---
Kernel panic - not syncing: Fatal exception in interrupt

This patch allocates enough space (2 * sizeof(struct pt_regs)) from
the stack to prevent such corruption.

Signed-off-by: Mika Westerberg <ext-mika.1.westerberg@nokia.com>
Acked-by: Nicolas Pitre <nico@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-03-29 17:33:33 +01:00
viresh kumar
55a07517ed ARM: 6001/1: removing compilation warning comming from clkdev.h
clkdev.h is using struct device *. Due to this compilation
warning is comming. Removing this warning.

Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-03-29 17:33:32 +01:00
viresh kumar
aedceb2a49 ARM: 6000/1: removing compilation warning comming from <asm/irq.h>
irq.h is using struct pt_regs *. Due to this compilation
warning is comming. Removing this warning by adding declaration
of struct pt_regs.

Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-03-29 17:33:31 +01:00
Matt Fleming
4bea3418c7 sh: Enable the mmu in start_secondary()
For the boot, enable_mmu() is called from setup_arch() but we don't call
setup_arch() for any of the other cpus. So turn on the non-boot cpu's
mmu inside of start_secondary().

I noticed this bug on an SMP board when trying to map I/O memory
(smsc911x registers) into the kernel address space. Since the Address
Translation bit in MMUCR wasn't set, accessing the virtual address where
the smsc911x registers were supposedly mapped actually performed a
physical address access.

Signed-off-by: Matt Fleming <matt@console-pimps.org>
Cc: stable@kernel.org
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-03-29 12:11:51 +09:00
Andrew Stubbs
d5ab780305 sh: Fix FDPIC binary loader
Ensure that the aux table is properly initialized, even when optional
features are missing. Without this, the FDPIC loader did not work.

Signed-off-by: Andrew Stubbs <ams@codesourcery.com>
Cc: stable@kernel.org
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-03-29 12:04:19 +09:00
Julia Lawall
59a2f7d9fd arch/sh/kernel: Use set_cpus_allowed_ptr
Use set_cpus_allowed_ptr rather than set_cpus_allowed.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression E1,E2;
@@

- set_cpus_allowed(E1, cpumask_of_cpu(E2))
+ set_cpus_allowed_ptr(E1, cpumask_of(E2))

@@
expression E;
identifier I;
@@

- set_cpus_allowed(E, I)
+ set_cpus_allowed_ptr(E, &I)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-03-29 11:40:37 +09:00
Yusuke Goda
5f6c477a35 sh: Update ecovec_defconfig
Signed-off-by: Yusuke Goda <goda.yusuke@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-03-29 11:37:49 +09:00
Catalin Marinas
325ffc3633 ARM: 5997/1: ARM: Correct the VFPv3 detection
A CPU has VFPv3 hardware if the FPSID[19:16] bits are 2 or more.
Currently Linux was only checking for 3 or more.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-03-28 10:40:14 +01:00
Julia Lawall
d2566af8c4 arch/sparc/kernel: Use set_cpus_allowed_ptr
Use set_cpus_allowed_ptr rather than set_cpus_allowed.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression E1,E2;
@@

- set_cpus_allowed(E1, cpumask_of_cpu(E2))
+ set_cpus_allowed_ptr(E1, cpumask_of(E2))

@@
expression E;
identifier I;
@@

- set_cpus_allowed(E, I)
+ set_cpus_allowed_ptr(E, &I)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-03-27 21:11:56 -07:00
Rob Landley
7469a9acf9 sparc: Fix use of uid16_t and gid16_t in asm/stat.h
Signed-off-by: Rob Landley <rob@landley.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-03-27 08:36:18 -07:00
Roman Fietze
ed01f64b83 powerpc/5200: in lpbfifo, flag DMA irqs as enabled after requesting them
This patch avoids unbalanced enable/disable messages for the DMA
interrupts when running the 5200 platform SCLPC/BestComm driver in DMA
mode.

Signed-off-by: Roman Fietze <roman.fietze@telemotive.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-03-26 22:09:57 -06:00
Linus Torvalds
b72c40949b Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6:
  x86/PCI: truncate _CRS windows with _LEN > _MAX - _MIN + 1
  x86/PCI: for host bridge address space collisions, show conflicting resource
  frv/PCI: remove redundant warnings
  x86/PCI: remove redundant warnings
  PCI: don't say we claimed a resource if we failed
  PCI quirk: Disable MSI on VIA K8T890 systems
  PCI quirk: RS780/RS880: work around missing MSI initialization
  PCI quirk: only apply CX700 PCI bus parking quirk if external VT6212L is present
  PCI: complain about devices that seem to be broken
  PCI: print resources consistently with %pR
  PCI: make disabled window printk style match the enabled ones
  PCI: break out primary/secondary/subordinate for readability
  PCI: for address space collisions, show conflicting resource
  resources: add interfaces that return conflict information
  PCI: cleanup error return for pcix get and set mmrbc functions
  PCI: fix access of PCI_X_CMD by pcix get and set mmrbc functions
  PCI: kill off pci_register_set_vga_state() symbol export.
  PCI: fix return value from pcix_get_max_mmrbc()
2010-03-26 16:34:29 -07:00
Linus Torvalds
f3845f3f60 Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, amd: Restrict usage of c1e_idle()
  x86: Fix placement of FIX_OHCI1394_BASE
  x86: Handle legacy PIC interrupts on all the cpu's
2010-03-26 15:10:56 -07:00
Linus Torvalds
6fa41366c1 Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  powerpc/perf_events: Fix call-graph recording, add perf_arch_fetch_caller_regs
  perf top: Add missing initialization to zero
  perf probe: Use original address instead of CU-based address
  perf probe: Fix offset to allow signed value
  perf top: Improve the autosizing of column lenghts
  perf probe: Fix need_dwarf flag if lazy matching is used
  perf probe: Fix probe_point buffer overrun
2010-03-26 15:09:33 -07:00
Matt Fleming
4539282dbc sh: update the TLB replacement counter for entry wiring.
Presently the TLB wiring code depends on MMUCR.URB for working out where
to place the wired entry, but fails to take the replacment counter in to
consideration. This fixes up the wiring logic and ensures that wired
entries remain so.

Signed-off-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-03-26 11:37:16 +09:00
Catalin Marinas
e7c5650f60 ARM: 5996/1: ARM: Change the mandatory barriers implementation (4/4)
The mandatory barriers (mb, rmb, wmb) are used even on uniprocessor
systems for things like ordering Normal Non-cacheable memory accesses
with DMA transfer (via Device memory writes). The current implementation
uses dmb() for mb() and friends but this is not sufficient. The DMB only
ensures the relative ordering of the observability of accesses by other
processors or devices acting as masters. In case of DMA transfers
started by writes to device memory, the relative ordering is not ensured
because accesses to slave ports of a device are not considered
observable by the DMB definition.

A DSB is required for the data to reach the main memory (even if mapped
as Normal Non-cacheable) before the device receives the notification to
begin the transfer. Furthermore, some L2 cache controllers (like L2x0 or
PL310) buffer stores to Normal Non-cacheable memory and this would need
to be drained with the outer_sync() function call.

The patch also allows platforms to define their own mandatory barriers
implementation by selecting CONFIG_ARCH_HAS_BARRIERS and providing a
mach/barriers.h file.

Note that the SMP barriers are unchanged (being DMBs as before) since
they are only guaranteed to work with Normal Cacheable memory.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-03-25 21:13:50 +00:00
Catalin Marinas
23107c5420 ARM: 5995/1: ARM: Add L2x0 outer_sync() support (3/4)
The L2x0 cache controllers need to explicitly drain their write buffer
even for Normal Noncacheable memory accesses.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-03-25 21:13:50 +00:00
Catalin Marinas
319f551a0a ARM: 5994/1: ARM: Add outer_cache_fns.sync function pointer (2/4)
This patch introduces the outer_cache_fns.sync function pointer together
with the OUTER_CACHE_SYNC config option that can be used to drain the
write buffer of the outer cache.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-03-25 21:13:49 +00:00
Catalin Marinas
33f663ff91 ARM: 5993/1: ARM: Move the outer_cache definitions into a separate file (1/4)
To avoid #include collisions with subsequent patches in the series, this
patch moves the outer_cache definitions to a separate asm/outercache.h
file.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-03-25 21:13:49 +00:00
Bjorn Helgaas
d558b483d5 x86/PCI: truncate _CRS windows with _LEN > _MAX - _MIN + 1
Yanko's GA-MA78GM-S2H (BIOS F11) reports the following resource in a PCI
host bridge _CRS:

    [07] 32-Bit DWORD Address Space Resource
         Min Relocatability : MinFixed
         Max Relocatability : MaxFixed
            Address Minimum : CFF00000  (_MIN)
            Address Maximum : FEBFFFFF  (_MAX)
             Address Length : 3EE10000  (_LEN)

This is invalid per spec (ACPI 4.0, 6.4.3.5) because it's a fixed size,
fixed location descriptor, but _LEN != _MAX - _MIN + 1.

Based on https://bugzilla.kernel.org/show_bug.cgi?id=15480#c15, I think
Windows handles this by truncating the window so it fits between _MIN and
_MAX.  I also verified this by modifying the SeaBIOS DSDT and booting
Windows 2008 R2 with qemu.

This patch makes Linux truncate the window, too, which fixes:
    http://bugzilla.kernel.org/show_bug.cgi?id=15480

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Tested-by: Yanko Kaneti <yaneti@declera.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2010-03-25 10:14:13 -07:00
Bjorn Helgaas
eb9fc8ef7c x86/PCI: for host bridge address space collisions, show conflicting resource
With insert_resource_conflict(), we can learn what the actual conflict is,
so print that info for debugging purposes.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2010-03-25 10:14:07 -07:00
Bjorn Helgaas
99f4692e13 frv/PCI: remove redundant warnings
pci_claim_resource() already prints more detailed error messages, so these
are really redundant.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2010-03-25 08:51:40 -07:00
Bjorn Helgaas
c9c9b56471 x86/PCI: remove redundant warnings
pci_claim_resource() already prints more detailed error messages, so these
are really redundant.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2010-03-25 08:51:38 -07:00
Sascha Hauer
0491fcbb76 Merge branch 'mx51' into mxc-rc 2010-03-25 08:44:12 +01:00
Alberto Panizzo
ae7a3f13ab MXC: mach-mx31_3ds: add support for freescale mc13783 power management device.
Power Gates must to be always enabled.

Signed-off-by: Alberto Panizzo <maramaopercheseimorto@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2010-03-25 08:43:03 +01:00
Alberto Panizzo
a1ac442443 MXC: mach-mx31_3ds: Add SPI1 device support.
Signed-off-by: Alberto Panizzo <maramaopercheseimorto@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2010-03-25 08:43:03 +01:00
Alberto Panizzo
a1b67b957e MXC: mach-mx31_3ds: Add support for on board NAND Flash.
Since the using of Bad Block Table is not constantly a good behave
I had made it configurable.

Signed-off-by: Alberto Panizzo <maramaopercheseimorto@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2010-03-25 08:43:03 +01:00
Alberto Panizzo
11a332adfe MXC: mach-mx31_3ds: Update variable names over recent mach name modification.
Signed-off-by: Alberto Panizzo <maramaopercheseimorto@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2010-03-25 08:43:03 +01:00
Vladimir Zapolskiy
6dc2d6bf51 imx31: fix parent clock for rtc
According to imx31 reference manual the signal from external low
frequency clock is sent to RTC clock.
The patch makes redundant the previously defined mxc_rtc clock.

Signed-off-by: Vladimir Zapolskiy <vzapolskiy@gmail.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Daniel Mack <daniel@caiaq.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2010-03-25 08:29:41 +01:00
Linus Torvalds
1ff31056fb Merge master.kernel.org:/home/rmk/linux-2.6-arm
* master.kernel.org:/home/rmk/linux-2.6-arm:
  [ARM] Orion5x: replace KEY_WLAN with KEY_WPS_BUTTON
  [ARM] Kirkwood: WPS button keycode mapping
  pxa168fb: fix incorrect resource calculation
  [ARM] pxa/raumfeld: fix button name
  [ARM] pxa/raumfeld: remove duplicated #include
  [ARM] locomo: fix unpaired spin_lock_irqsave
  [ARM] locomo: fix SPI register offset
  [ARM] pxa/sharpsl: add dependency of max1111 driver to sharpsl_pm
  [ARM] pxa: remove unnecessary 'select FB_W100' from some platforms
  [ARM] pxa: remove spi cs gpio direction to avoid clash with driver
  [ARM] mmp: fix for variables in uncompress.h being discarded
  [ARM] pxa: fix for variables in uncompress.h being discarded
  ARM: Update mach-types
  ARM: Fix IXP23xx build error in mach/memory.h
2010-03-24 16:51:14 -07:00
Linus Torvalds
541e40ee08 Merge branch 'sh/for-2.6.34' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6
* 'sh/for-2.6.34' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6:
  sh: Silence unintialized variable warnings in dwarf unwinder.
  sh: Tidy up a couple of section mismatches.
  sh: Fix build after dynamic PMB rework
  sh: Replace unsafe manipulation of MMUCR
  sh: Flush ITLB too in PTEAEX's flush_tlb_page()
  sh64: Remove long unused mid_sched macro
  SH: remove superfluous warning from the serial driver
  SH: fix SCIFA SCASCR register bit definitions
  serial: sh-sci: fix SH-Mobile SH breakage
  sh: Add watch-dog register address for SH7722/SH7723/SH7724
  sh: ms7724: Add tiny-document for sound
  sh: mach-ecovec24: Add i2c_put_adapter on sh_eth_init
2010-03-24 16:49:38 -07:00