Tejun, while reviewing the code, spotted the following race condition
between the dirtying and truncation of a page:
__set_page_dirty_nobuffers() __delete_from_page_cache()
if (TestSetPageDirty(page))
page->mapping = NULL
if (PageDirty())
dec_zone_page_state(page, NR_FILE_DIRTY);
dec_bdi_stat(mapping->backing_dev_info, BDI_RECLAIMABLE);
if (page->mapping)
account_page_dirtied(page)
__inc_zone_page_state(page, NR_FILE_DIRTY);
__inc_bdi_stat(mapping->backing_dev_info, BDI_RECLAIMABLE);
which results in an imbalance of NR_FILE_DIRTY and BDI_RECLAIMABLE.
Dirtiers usually lock out truncation, either by holding the page lock
directly, or in case of zap_pte_range(), by pinning the mapcount with
the page table lock held. The notable exception to this rule, though,
is do_wp_page(), for which this race exists. However, do_wp_page()
already waits for a locked page to unlock before setting the dirty bit,
in order to prevent a race where clear_page_dirty() misses the page bit
in the presence of dirty ptes. Upgrade that wait to a fully locked
set_page_dirty() to also cover the situation explained above.
Afterwards, the code in set_page_dirty() dealing with a truncation race
is no longer needed. Remove it.
Reported-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Constantly forking task causes unlimited grow of anon_vma chain. Each
next child allocates new level of anon_vmas and links vma to all
previous levels because pages might be inherited from any level.
This patch adds heuristic which decides to reuse existing anon_vma
instead of forking new one. It adds counter anon_vma->degree which
counts linked vmas and directly descending anon_vmas and reuses anon_vma
if counter is lower than two. As a result each anon_vma has either vma
or at least two descending anon_vmas. In such trees half of nodes are
leafs with alive vmas, thus count of anon_vmas is no more than two times
bigger than count of vmas.
This heuristic reuses anon_vmas as few as possible because each reuse
adds false aliasing among vmas and rmap walker ought to scan more ptes
when it searches where page is might be mapped.
Link: http://lkml.kernel.org/r/20120816024610.GA5350@evergreen.ssec.wisc.edu
Fixes: 5beb493052 ("mm: change anon_vma linking to fix multi-process server scalability issue")
[akpm@linux-foundation.org: fix typo, per Rik]
Signed-off-by: Konstantin Khlebnikov <koct9i@gmail.com>
Reported-by: Daniel Forrest <dan.forrest@ssec.wisc.edu>
Tested-by: Michal Hocko <mhocko@suse.cz>
Tested-by: Jerome Marchand <jmarchan@redhat.com>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
Reviewed-by: Rik van Riel <riel@redhat.com>
Cc: <stable@vger.kernel.org> [2.6.34+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
wait_consider_task() checks EXIT_ZOMBIE after EXIT_DEAD/EXIT_TRACE and
both checks can fail if we race with EXIT_ZOMBIE -> EXIT_DEAD/EXIT_TRACE
change in between, gcc needs to reload p->exit_state after
security_task_wait(). In this case ->notask_error will be wrongly
cleared and do_wait() can hang forever if it was the last eligible
child.
Many thanks to Arne who carefully investigated the problem.
Note: this bug is very old but it was pure theoretical until commit
b3ab03160d ("wait: completely ignore the EXIT_DEAD tasks"). Before
this commit "-O2" was probably enough to guarantee that compiler won't
read ->exit_state twice.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Reported-by: Arne Goedeke <el@laramies.com>
Tested-by: Arne Goedeke <el@laramies.com>
Cc: <stable@vger.kernel.org> [3.15+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
In dlm_process_recovery_data, only when dlm_new_lock failed the ret will
be set to -ENOMEM. And in this case, newlock is definitely NULL. So
test newlock is meaningless, remove it.
Signed-off-by: Joseph Qi <joseph.qi@huawei.com>
Reviewed-by: Alex Chen <alex.chen@huawei.com>
Reviewed-by: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Pull kbuild fix from Michal Marek:
"make mrproper / distclean stopped removing the generated debian/
directory in v3.16. This fixes it"
* 'rc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
kbuild: Fix removal of the debian/ directory
The introduction of the uapi directories in v3.7-rc1 moved some of the
generated headers from arch/*/include/generated to the uapi directory,
keeping the #include directives intact.
This creates a problem when bisecting, because the unversioned files are
not cleaned automatically by git and the compiler might include stale
headers as a result. Instead of cleaning them in the Makefiles, promote
arch/*/include/generated/uapi in the search path. Under normal
circumstances, there is no overlap between this uapi subdirectory and
its parent, so the include choices remain the same. We keep
arch/*/include/generated/uapi in the USERINCLUDE variable so that it is
usable standalone.
Note that we cannot completely swap the order of the uapi and
kernel-only directories, since the headers in include/uapi/asm-generic
are meant to be wrapped by their include/asm-generic counterparts when
building kernel code.
Reported-by: "Nicholas A. Bellinger" <nab@linux-iscsi.org>
Reported-by: David Drysdale <dmd@lurklurk.org>
Signed-off-by: Michal Marek <mmarek@suse.cz>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
and STi drivers.
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Merge tag 'pinctrl-v3.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl
Pull pinctrl fixes from Linus Walleij:
"Allright allright I've been lazy over christmas and New Years. Here
are a few collected pin control fixes eventually. Details:
A set of assorted pin control fixes for the Rockchip and STi drivers"
* tag 'pinctrl-v3.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
pinctrl: st: Add irq_disable hook to st_gpio_irqchip
pinctrl: st: avoid multiple mutex lock
pinctrl: rockchip: Fix enable/disable/mask/unmask
pinctrl: rockchip: Handle wakeup pins
- Fix ACPI power management intialization for device objects
corresponding to devices that are not present at the init time
(the _STA control method returns 0 for them) and therefore should
not be regarded as power manageable (Rafael J Wysocki).
- Rename a structure field and two functions used by the ACPI
processor driver to make them less tied to architectures that
use APICs (both x86 and ia64) and more suitable for ARM64
processors (Hanjun Guo).
- Add a disable_native_backlight quirk for Dell XPS15 L521X
designed in an unusual way preventing native backlight from
working on that machine (Hans de Goede).
/
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Merge tag 'pm+acpi-3.19-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management and ACPI fixes from Rafael Wysocki:
"These are an ACPI device power management initialization fix (-stable
material), two commits renaming stuff in the ACPI processor driver to
make it more suitable for ARM64 processors and a new ACPI backlight
blacklist entry.
Specifics:
- Fix ACPI power management intialization for device objects
corresponding to devices that are not present at the init time (the
_STA control method returns 0 for them) and therefore should not be
regarded as power manageable (Rafael J Wysocki).
- Rename a structure field and two functions used by the ACPI
processor driver to make them less tied to architectures that use
APICs (both x86 and ia64) and more suitable for ARM64 processors
(Hanjun Guo).
- Add a disable_native_backlight quirk for Dell XPS15 L521X designed
in an unusual way preventing native backlight from working on that
machine (Hans de Goede)"
* tag 'pm+acpi-3.19-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI / video: Add disable_native_backlight quirk for Dell XPS15 L521X
ACPI / processor: Rename acpi_(un)map_lsapic() to acpi_(un)map_cpu()
ACPI / processor: Convert apic_id to phys_id to make it arch agnostic
ACPI / PM: Fix PM initialization for devices that are not present
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Merge tag 'keys-fixes-20150107' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs
Pull keyrings fixes from David Howells:
"Two fixes:
- Fix for the order in which things are done during key garbage
collection to prevent named keyrings causing a crash
[CVE-2014-9529].
- Fix assoc_array to explicitly #include rcupdate.h to prevent
compilation errors under certain circumstances"
* tag 'keys-fixes-20150107' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
assoc_array: Include rcupdate.h for call_rcu() definition
KEYS: close race between key lookup and freeing
This fixes a couple of bugs triggered by hot-unplug
of virtio devices, as well as a regression in vhost-net.
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
pull virtio/vhost fixes from Michael Tsirkin:
"This fixes a couple of bugs triggered by hot-unplug of virtio devices,
as well as a regression in vhost-net"
* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
vhost/net: length miscalculation
virtio_pci: document why we defer kfree
virtio_pci: defer kfree until release callback
virtio_pci: device-specific release callback
virtio: make del_vqs idempotent
Including:
* A domain structure leak fix in the Intel VT-d driver
* Compile error fix for the VMSA IPMMU driver because of the
IOMMU_EXEC -> IOMMU_NOEXEC conversion
* Two small cleanups as an aftermath of the merge window and the
domain-leak fix
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Merge tag 'iommu-fixes-v3.19-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull IOMMU fixes from Joerg Roedel:
"Including:
- a domain structure leak fix in the Intel VT-d driver
- compile error fix for the VMSA IPMMU driver because of the
IOMMU_EXEC -> IOMMU_NOEXEC conversion
- two small cleanups as an aftermath of the merge window and the
domain-leak fix"
* tag 'iommu-fixes-v3.19-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
iommu/rockchip: Drop owner assignment from platform_drivers
iommu/vt-d: Remove dead code in device_notifier
iommu/vt-d: Fix dmar_domain leak in iommu_attach_device
iommu/ipmmu-vmsa: Change IOMMU_EXEC to IOMMU_NOEXEC
Pull crypto fixes from Herbert Xu:
"This fixes a build problem with sha-mb with old toolchains and an
implementation bug in the ctr(aes)/by8 branch of aesni-intel that's
enabled when AVX is available"
* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: sha-mb - Add avx2_supported check.
crypto: aesni - fix "by8" variant for 128 bit keys
When perf report on TUI shows callchain it checks first node has
siblings to determine whether it needs to print percentage value.
But it missed a case that first node is NULL. So sometimes it segfaults
like below:
$ perf top -g
perf: Segmentation fault
-------- backtrace --------
perf[0x4fcefb]
/usr/lib/libc.so.6(+0x33b20)[0x7f2a35839b20]
perf(rb_next+0x8)[0x47d3d8]
perf[0x4f6058]
perf[0x4f833b]
perf[0x4f8610]
perf[0x4f209e]
perf(ui_browser__run+0x3a)[0x4f2e6a]
perf[0x4f94ee]
perf(perf_evlist__tui_browse_hists+0x94)[0x4fbbf4]
perf[0x444d10]
/usr/lib/libpthread.so.0(+0x7314)[0x7f2a37070314]
/usr/lib/libc.so.6(clone+0x6d)[0x7f2a358ee5bd]
$ addr2line -e `which perf` 0x4f6058
/home/namhyung/project/linux/tools/perf/ui/browsers/hists.c:553
I don't know why the backtrace didn't print some symbols..
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Fixes: 4087d11cd9 ("perf hists browser: Print overhead percent value for first-level callchain")
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1419401076-21700-1-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Markus reported that "perf top -g" can leak ~300MB per second on his
machine. This is partly because it missed to free callchains when hist
entries are deleted. Fix it.
Reported-by: Markus Trippelsdorf <markus@trippelsdorf.de>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Markus Trippelsdorf <markus@trippelsdorf.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20141230053813.GD6081@sejong
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
When perf report --children resorts output fields, it tries to put
caller above the callee. But this was only meaningful for a same thread
and doing this requires callchain enabled. So fix its check before
comparing the callchain depth.
This also changes the hist accumulation tests: In test 3, xmalloc in
bash thread should be above than other perf threads due to alphabetical
order of comm string. Also it's under page_fault in bash thread since
alphabetical order of dso name. The sys_perf_event_open in perf thread
is put on the last line since it's self overhead is 0.
In test 4, the sys_perf_event_open is put above other perf entries that
have same children overhead since its callchain depth is smaller.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1419309381-2593-1-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
The early ioremap support introduced by patch bf4b558eba
("arm64: add early_ioremap support") failed to add a call to
early_ioremap_reset() at an appropriate time. Without this call,
invocations of early_ioremap etc. that are done too late will go
unnoticed and may cause corruption.
This is exactly what happened when the first user of this feature
was added in patch f84d02755f ("arm64: add EFI runtime services").
The early mapping of the EFI memory map is unmapped during an early
initcall, at which time the early ioremap support is long gone.
Fix by adding the missing call to early_ioremap_reset() to
setup_arch(), and move the offending early_memunmap() to right after
the point where the early mapping of the EFI memory map is last used.
Fixes: f84d02755f ("arm64: add EFI runtime services")
Cc: <stable@vger.kernel.org>
Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
- 'perf probe' should fall back to find probe point in symbols when failing
to do so in a debuginfo file (Masami Hiramatsu)
- Fix 'perf probe' crash in dwarf_getcfi_elf (Namhyung Kim)
- Fix shell completion with 'perf list' --raw-dump option (Taesoo Kim)
- Fix 'perf diff' to sort by baseline field by default (Namhyung Kim)
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-urgent-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent
Pull perf/urgent fixes from Arnaldo Carvalho de Melo:
"
- 'perf probe' should fall back to find probe point in symbols when failing
to do so in a debuginfo file (Masami Hiramatsu)
- Fix 'perf probe' crash in dwarf_getcfi_elf (Namhyung Kim)
- Fix shell completion with 'perf list' --raw-dump option (Taesoo Kim)
- Fix 'perf diff' to sort by baseline field by default (Namhyung Kim)
"
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
- Complete overhaul to the main IOCTL function, kfd_ioctl(), according to
drm_ioctl() example. This includes changing the IOCTL definitions, so it
breaks compatibility with previous versions of the userspace. However,
because the kernel was not officialy released yet, and this the first
kernel that includes amdkfd, I assume I can still do that at this stage.
- A couple of bug fixes for the non-HWS path (used for bring-ups and
debugging purposes only).
* tag 'amdkfd-fixes-2015-01-06' of git://people.freedesktop.org/~gabbayo/linux:
drm/amdkfd: rewrite kfd_ioctl() according to drm_ioctl()
drm/amdkfd: reformat IOCTL definitions to drm-style
drm/amdkfd: Do copy_to/from_user in general kfd_ioctl()
drm/amdkfd: unmap VMID<-->PASID when relesing VMID (non-HWS)
drm/radeon: Assign VMID to PASID for IH in non-HWS mode
drm/radeon: do not leave queue acquired if timeout happens in kgd_hqd_destroy()
drm/amdkfd: Load mqd to hqd in non-HWS mode
drm/amd: Fixing typos in kfd<->kgd interface
some minor radeon fixes.
* 'drm-fixes-3.19' of git://people.freedesktop.org/~agd5f/linux:
drm/radeon: integer underflow in radeon_cp_dispatch_texture()
drm/radeon: adjust default bapm settings for KV
drm/radeon: properly filter DP1.2 4k modes on non-DP1.2 hw
drm/radeon: fix sad_count check for dce3
drm/radeon: KV has three PPLLs (v2)
- Fix BUG() on !SMP builds
- Fix for OOPS on pre-NV50 that snuck into -next
- MCP7[789A] hang fix where firmware hasn't already setup NISO pollers
- NV4x IGP MSI disable, it doesn't appear to work correctly
- Add GK208B to recognised boards (no code change aside from adding
chipset recognition)
* 'linux-3.19' of git://anongit.freedesktop.org/git/nouveau/linux-2.6:
drm/nouveau/nouveau: Do not BUG_ON(!spin_is_locked()) on UP
drm/nv4c/mc: disable msi
drm/nouveau/fb/ram/mcp77: enable NISO poller
drm/nouveau/fb/ram/mcp77: use carveout reg to determine size
drm/nouveau/fb/ram/mcp77: subclass nouveau_ram
drm/nouveau: wake up the card if necessary during gem callbacks
drm/nouveau/device: Add support for GK208B, resolves bug 86935
drm/nouveau: fix missing return statement in nouveau_ttm_tt_unpopulate
drm/nouveau/bios: fix oops on pre-nv50 chipsets
Now local variables kernel_x_start and kernel_x_end defined using
'unsigned long' type which is wrong because they represent physical
memory range and will be calculated wrongly if LPAE is enabled.
As result, all following code in map_lowmem() will not work correctly.
For example, Keystone 2 boot is broken because
kernel_x_start == 0x0000 0000
kernel_x_end == 0x0080 0000
instead of
kernel_x_start == 0x0000 0008 0000 0000
kernel_x_end == 0x0000 0008 0080 0000
and as result whole low memory will be mapped with MT_MEMORY_RW
permissions by code (start > kernel_x_end):
} else if (start >= kernel_x_end) {
map.pfn = __phys_to_pfn(start);
map.virtual = __phys_to_virt(start);
map.length = end - start;
map.type = MT_MEMORY_RW;
create_mapping(&map);
}
Hence, fix it by using phys_addr_t type for variables kernel_x_start
and kernel_x_end.
Tested-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: Grygorii Strashko <grygorii.strashko@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Currently the arm page table dumping code starts dumping page tables
from USER_PGTABLES_CEILING. This is unnecessary for skipping any entries
related to userspace as the swapper_pg_dir does not contain such
entries, and results in a couple of unfortuante side effects.
Firstly, any kernel mappings which might exist below
USER_PGTABLES_CEILING will not be accounted in the dump output. This
masks any entries erroneously created below this address.
Secondly, if the final page table entry walked is part of a valid
mapping the page table dumping code will not log the region this entry
is part of, as the final note_page call in walk_pgd will trigger an
early return when 0 < USER_PGTABLES_CEILING. Luckily this isn't seen on
contemporary systems as they typically don't have enough RAM to extend
the linear mapping right to the end of the address space.
Due to the way addr is constructed in the walk_* functions, it can never
be less than USER_PGTABLES_CEILING when walking the page tables, so it
is not necessary to avoid dereferencing invalid table addresses. The
existing checks for st->current_prot and st->marker[1].start_address are
sufficient to ensure we will not print and/or dereference garbage when
trying to log information.
This patch removes both problematic uses of USER_PGTABLES_CEILING from
the arm page table dumping code, preventing both of these issues. We
will now report any low mappings, and the final note_page call will not
return early, ensuring all regions are logged.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Steve Capper <steve.capper@linaro.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
A struct xdr_stream at a page boundary might point to the end of one
page or the beginning of the next, but xdr_truncate_encode isn't
prepared to handle the former.
This can cause corruption of NFSv4 READDIR replies in the case that a
readdir entry that would have exceeded the client's dircount/maxcount
limit would have ended exactly on a 4k page boundary. You're more
likely to hit this case on large directories.
Other xdr_truncate_encode callers are probably also affected.
Reported-by: Holger Hoffstätte <holger.hoffstaette@googlemail.com>
Tested-by: Holger Hoffstätte <holger.hoffstaette@googlemail.com>
Fixes: 3e19ce762b "rpc: xdr_truncate_encode"
Cc: stable@vger.kernel.org
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Currently, nfs4_set_delegation takes a reference to an existing
delegation and then checks to see if there is a conflict. If there is
one, then it doesn't release that reference.
Change the code to take the reference after the check and only if there
is no conflict.
Signed-off-by: Jeff Layton <jlayton@primarydata.com>
Cc: stable@vger.kernel.org
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Current vfio-pci just supports normal pci device, so vfio_pci_probe() will
return if the pci device is not a normal device. While current code makes a
mistake. PCI_HEADER_TYPE is the offset in configuration space of the device
type, but we use this value to mask the type value.
This patch fixs this by do the check directly on the pci_dev->hdr_type.
Signed-off-by: Wei Yang <weiyang@linux.vnet.ibm.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Cc: stable@vger.kernel.org # v3.6+
Include rcupdate.h header to provide call_rcu() definition. This was implicitly
being provided by slab.h file which include srcu.h somewhere in its include
hierarchy which in-turn included rcupdate.h.
Lately, tinification effort added support to remove srcu entirely because of
which we are encountering build errors like
lib/assoc_array.c: In function 'assoc_array_apply_edit':
lib/assoc_array.c:1426:2: error: implicit declaration of function 'call_rcu' [-Werror=implicit-function-declaration]
cc1: some warnings being treated as errors
Fix these by including rcupdate.h explicitly.
Signed-off-by: Pranith Kumar <bobby.prani@gmail.com>
Reported-by: Scott Wood <scottwood@freescale.com>
Although the 't->length' is a big-endian value, it's used without any
conversion. This means that the driver always uses 'length' parameter.
Fixes: 555e8a8f7f14("ALSA: fireworks: Add command/response functionality into hwdep interface")
Reported-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
On next-20150105, defconfig compilation breaks with:
arch/arm64/kernel/smp_spin_table.c:80:2: error: implicit declaration of function ‘ioremap_cache’ [-Werror=implicit-function-declaration]
arch/arm64/kernel/smp_spin_table.c:92:2: error: implicit declaration of function ‘writeq_relaxed’ [-Werror=implicit-function-declaration]
arch/arm64/kernel/smp_spin_table.c:101:2: error: implicit declaration of function ‘iounmap’ [-Werror=implicit-function-declaration]
Fix by including asm/io.h, which contains definitions or prototypes
for these macros or functions.
This second version incorporates a comment from Mark Rutland
<mark.rutland@arm.com> to keep the includes in alphabetical order
by filename.
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Paul Walmsley <pwalmsley@nvidia.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
On next-20150105, defconfig compilation breaks with:
arch/arm64/kernel/module.c:408:4: error: implicit declaration of function ‘apply_alternatives’ [-Werror=implicit-function-declaration]
Fix by including asm/alternative.h, where the apply_alternatives()
prototype is declared.
This second version incorporates a comment from Mark Rutland
<mark.rutland@arm.com> to keep the includes in alphabetical order
by filename.
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Paul Walmsley <pwalmsley@nvidia.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
On next-20150105, defconfig compilation breaks with:
./arch/arm64/include/asm/arch_timer.h:112:2: error: implicit declaration of function ‘BUG’ [-Werror=implicit-function-declaration]
Fix by including linux/bug.h, where the BUG macro is defined.
This second version incorporates a comment from Mark Rutland
<mark.rutland@arm.com> to keep the includes in alphabetical order
by filename.
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Paul Walmsley <pwalmsley@nvidia.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
On next-20150105, defconfig compilation breaks with:
./arch/arm64/include/asm/processor.h:47:32: error: ‘PHYS_MASK’ undeclared (first use in this function)
Fix by including asm/pgtable-hwdef.h, where PHYS_MASK is defined.
This second version incorporates a comment from Mark Rutland
<mark.rutland@arm.com> to keep the includes in alphabetical order
by filename.
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Paul Walmsley <pwalmsley@nvidia.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
We don't currently check a number of registers exposed to AArch32 guests
(MVFR{0,1,2}_EL1 and ID_DFR0_EL1), despite the fact these describe
AArch32 feature support exposed to userspace and KVM guests similarly to
AArch64 registers which we do check. We do not expect these registers to
vary across a set of CPUs.
This patch adds said registers to the cpuinfo framework and sanity
checks. No sanity check failures have been observed on a current ARMv8
big.LITTLE platform (Juno).
Cc: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: Suzuki K. Poulose <suzuki.poulose@arm.com>
Signed-off-by: Suzuki K. Poulose <suzuki.poulose@arm.com>
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
prepare_to_copy() was removed from all architectures supported at that
time in commit 55ccf3fe3f ("fork: move the real prepare_to_copy()
users to arch_dup_task_struct()"). Remove it from arm64 as well.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Commit 97b56be103 (arm64: compat: Enable bpf syscall) made the
usual mistake of forgetting to update __NR_compat_syscalls. Due to this,
when el0_sync_compat calls el0_svc_naked, the test against sc_nr
(__NR_compat_syscalls) will fail, and we'll call ni_sys, returning
-ENOSYS to userspace.
This patch bumps __NR_compat_syscalls appropriately, enabling the use of
the bpf syscall from compat tasks.
Due to the reorganisation of unistd{,32}.h as part of commit
f3e5c847ec (arm64: Add __NR_* definitions for compat syscalls) it
is not currently possible to include both headers and sanity-check the
value of __NR_compat_syscalls at build-time to prevent this from
happening again. Additional rework is required to make such niceties a
possibility.
Cc: Will Deacon <will.deacon@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
commit 8b38694a2d
vhost/net: virtio 1.0 byte swap
had this chunk:
- heads[headcount - 1].len += datalen;
+ heads[headcount - 1].len = cpu_to_vhost32(vq, len - datalen);
This adds datalen with the wrong sign, causing guest panics.
Fixes: 8b38694a2d
Reported-by: Alex Williamson <alex.williamson@redhat.com>
Suggested-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Currently disable_irq() doesn't work for pinctrl-st driver, due to
missing irq_disable hook in the driver.
disable_irq() is required only for level-triggered interrupts, which
is not the case normally.
Signed-off-by: Pankaj Dev <pankaj.dev@st.com>
Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Using the sysfs inteface to inspect the pins configuration
the system can walk around a path which acquires the same
mutex twice.
On STiH407 platform, for example :
cat /sys/kernel/debug/pinctrl/920f080.pin-controller-front0/pinconf-pins
hangs the kernel and never returns.
With this patch the mutex is temporary freed.
Signed-off-by: Francesco Virlinzi <francesco.virlinzi@st.com>
Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Vendor ID 0x10de0072 is used by a yet-to-be-named GPU chip.
Signed-off-by: Aaron Plattner <aplattner@nvidia.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Pull networking fixes from David Miller:
"Just a pile of random fixes, including:
1) Do not apply TSO limits to non-TSO packets, fix from Herbert Xu.
2) MDI{,X} eeprom check in e100 driver is reversed, from John W.
Linville.
3) Missing error return assignments in several ethernet drivers, from
Julia Lawall.
4) Altera TSE device doesn't come back up after ifconfig down/up
sequence, fix from Kostya Belezko.
5) Add more cases to the check for whether the qmi_wwan device has a
bogus MAC address and needs to be assigned a random one. From
Kristian Evensen.
6) Fix interrupt hangs in CPSW, from Felipe Balbi.
7) Implement ndo_features_check in r8152 so that the stack doesn't
feed GSO packets which are outside of the chip's capabilities.
From Hayes Wang"
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (26 commits)
qla3xxx: don't allow never end busy loop
xen-netback: fixing the propagation of the transmit shaper timeout
r8152: support ndo_features_check
batman-adv: fix potential TT client + orig-node memory leak
batman-adv: fix multicast counter when purging originators
batman-adv: fix counter for multicast supporting nodes
batman-adv: fix lock class for decoding hash in network-coding.c
batman-adv: fix delayed foreign originator recognition
batman-adv: fix and simplify condition when bonding should be used
Revert "mac80211: Fix accounting of the tailroom-needed counter"
net: ethernet: cpsw: fix hangs with interrupts
enic: free all rq buffs when allocation fails
qmi_wwan: Set random MAC on devices with buggy fw
openvswitch: Consistently include VLAN header in flow and port stats.
tcp: Do not apply TSO segment limit to non-TSO packets
Altera TSE: Add missing phydev
net/mlx4_core: Fix error flow in mlx4_init_hca()
net/mlx4_core: Correcly update the mtt's offset in the MR re-reg flow
qlcnic: Fix return value in qlcnic_probe()
net: axienet: fix error return code
...
The counter variable wasn't increased at all which may stuck under
certain circumstances.
Signed-off-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
* acpi-pm:
ACPI / PM: Fix PM initialization for devices that are not present
* acpi-processor:
ACPI / processor: Rename acpi_(un)map_lsapic() to acpi_(un)map_cpu()
ACPI / processor: Convert apic_id to phys_id to make it arch agnostic
* acpi-video:
ACPI / video: Add disable_native_backlight quirk for Dell XPS15 L521X
The L521X variant of the Dell XPS15 has integrated nvidia graphics, and
backlight control does not work properly when using the native interfaces.
Link: https://bugzilla.redhat.com/show_bug.cgi?id=1163574
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
ext4 to handle ext3 file systems, plus two minor bug fixes.
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Merge tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
Pull ext4 bugfixes from Ted Ts'o:
"Revert a potential seek_data/hole regression which shows up when using
ext4 to handle ext3 file systems, plus two minor bug fixes"
* tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
ext4: remove spurious KERN_INFO from ext4_warning call
Revert "ext4: fix suboptimal seek_{data,hole} extents traversial"
ext4: prevent online resize with backup superblock
Jay Foad reports that the address sanitizer test (asan) sometimes gets
confused by a stack pointer that ends up being outside the stack vma
that is reported by /proc/maps.
This happens due to an interaction between RLIMIT_STACK and the guard
page: when we do the guard page check, we ignore the potential error
from the stack expansion, which effectively results in a missing guard
page, since the expected stack expansion won't have been done.
And since /proc/maps explicitly ignores the guard page (commit
d7824370e2: "mm: fix up some user-visible effects of the stack guard
page"), the stack pointer ends up being outside the reported stack area.
This is the minimal patch: it just propagates the error. It also
effectively makes the guard page part of the stack limit, which in turn
measn that the actual real stack is one page less than the stack limit.
Let's see if anybody notices. We could teach acct_stack_growth() to
allow an extra page for a grow-up/grow-down stack in the rlimit test,
but I don't want to add more complexity if it isn't needed.
Reported-and-tested-by: Jay Foad <jay.foad@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
- ensure bonding is used (if enabled) for packets coming in the soft
interface
- fix race condition to avoid orig_nodes to be deleted right after
being added
- avoid false positive lockdep splats by assigning lockclass to
the proper hashtable lock objects
- avoid miscounting of multicast 'disabled' nodes in the network
- fix memory leak in the Global Translation Table in case of
originator interval change
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Merge tag 'batman-adv-fix-for-davem' of git://git.open-mesh.org/linux-merge
Included changes:
- ensure bonding is used (if enabled) for packets coming in the soft
interface
- fix race condition to avoid orig_nodes to be deleted right after
being added
- avoid false positive lockdep splats by assigning lockclass to
the proper hashtable lock objects
- avoid miscounting of multicast 'disabled' nodes in the network
- fix memory leak in the Global Translation Table in case of
originator interval change
Signed-off-by: David S. Miller <davem@davemloft.net>
Since e9ce7cb6b1 ("xen-netback: Factor queue-specific data into queue struct"),
the transimt shaper timeout is always set to 0. The value the user sets via
xenbus is never propagated to the transmit shaper.
This patch fixes the issue.
Cc: Anthony Liguori <aliguori@amazon.com>
Signed-off-by: Imre Palik <imrep@amazon.de>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
