Tim Hockin f528e7ba28 x86_64: O_EXCL on /dev/mcelog ... Background: /dev/mcelog is a clear-on-read interface. It is currently possible for multiple users to open and read() the device. Users are protected from each other during any one read, but not across reads. Description: This patch adds support for O_EXCL to /dev/mcelog. If a user opens the device with O_EXCL, no other user may open the device (EBUSY). Likewise, any user that tries to open the device with O_EXCL while another user has the device will fail (EBUSY). Result: Applications can get exclusive access to /dev/mcelog. Applications that do not care will be unchanged. Alternatives: A simpler choice would be to only allow one open() at all, regardless of O_EXCL. Testing: I wrote an application that opens /dev/mcelog with O_EXCL and observed that any other app that tried to open /dev/mcelog would fail until the exclusive app had closed the device. Caveats: None. Signed-off-by: Tim Hockin <thockin@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2007-07-21 18:37:10 -07:00
..
acpi	PM: Integrate beeping flag with existing acpi_sleep flags	2007-07-19 10:04:43 -07:00
cpufreq	[CPUFREQ] the overdue removal of X86_SPEEDSTEP_CENTRINO_ACPI	2007-07-13 01:29:51 -04:00
aperture.c	x86_64: off-by-two error in aperture.c	2007-05-11 12:53:00 -07:00
apic.c	x86_64: apic.c coding style janitor work	2007-07-21 18:37:09 -07:00
asm-offsets.c	[PATCH] x86-64: Auto compute __NR_syscall_max at compile time	2007-05-02 19:27:18 +02:00
audit.c	[PATCH] audit signal recipients	2007-05-11 05:38:25 -04:00
bugs.c	x86_64: Add asm/mtrr.h include for some builds	2007-05-12 09:47:15 -07:00
crash_dump.c	[PATCH] kdump: read previous kernel's memory	2006-01-10 08:01:28 -08:00
crash.c	move die notifier handling to common code	2007-05-08 11:15:04 -07:00
e820.c	x86_64: extract helper function from e820_register_active_regions	2007-07-21 18:37:10 -07:00
early_printk.c	xen: use the hvc console infrastructure for Xen console	2007-07-18 08:47:44 -07:00
early-quirks.c	[PATCH] x86: revert x86_64-mm-fix-the-irqbalance-quirk-for-e7320-e7520-e7525	2007-05-02 19:27:04 +02:00
entry.S	x86_64: Ignore compat mode SYSCALL when IA32_EMULATION is not defined	2007-06-22 18:41:19 -07:00
genapic_flat.c	[PATCH] x86-64: Fix allnoconfig error in genapic_flat.c	2007-05-02 19:27:21 +02:00
genapic.c	[PATCH] x86: adjust inclusion of asm/fixmap.h	2007-05-02 19:27:04 +02:00
head64.c	x86_64: display more intuitive error message if kernel is not 2MB aligned	2007-05-11 08:29:32 -07:00
head.S	x86: initial fixmap support	2007-07-16 09:05:35 -07:00
hpet.c	x86_64: fiuxp pt_reqs leftovers	2007-07-21 18:37:09 -07:00
i387.c	[PATCH] x86-64: use BUILD_BUG_ON in FPU code	2006-12-07 02:14:01 +01:00
i8259.c	header cleaning: don't include smp_lock.h when not used	2007-05-08 11:15:07 -07:00
init_task.c	use the new percpu interface for shared data	2007-07-19 10:04:45 -07:00
io_apic.c	x86_64: set the irq_chip name for lapic	2007-06-26 16:54:29 -07:00
ioport.c	header cleaning: don't include smp_lock.h when not used	2007-05-08 11:15:07 -07:00
irq.c	x86_64 irq: use mask/unmask and proper locking in fixup_irqs()	2007-06-26 16:54:29 -07:00
k8.c	Avoid zero size allocation in cache_k8_northbridges()	2007-05-23 20:14:12 -07:00
kprobes.c	Kprobes: The ON/OFF knob thru debugfs	2007-05-08 11:15:19 -07:00
ldt.c	header cleaning: don't include smp_lock.h when not used	2007-05-08 11:15:07 -07:00
machine_kexec.c	Revert "[PATCH] x86: __pa and __pa_symbol address space separation"	2007-05-07 08:44:24 -07:00
Makefile	Use a new CPU feature word to cover features that are spread around	2007-07-12 10:55:54 -07:00
mce_amd.c	x86_64: Fix APIC typo	2007-07-21 18:37:09 -07:00
mce_intel.c	[PATCH] x86: Add a cumulative thermal throttle event counter.	2006-09-26 10:52:42 +02:00
mce.c	x86_64: O_EXCL on /dev/mcelog	2007-07-21 18:37:10 -07:00
module.c	[PATCH] Generic BUG for x86-64	2006-12-08 08:28:39 -08:00
mpparse.c	x86_64: remove unused variable maxcpus	2007-07-21 18:37:09 -07:00
nmi.c	x86_64: speedup touch_nmi_watchdog	2007-07-17 10:23:04 -07:00
pci-calgary.c	[PATCH] x86-64: dma_ops as const	2007-05-02 19:27:06 +02:00
pci-dma.c	PCI: remove pci_dac_dma_... APIs	2007-07-11 16:02:11 -07:00
pci-gart.c	x86_64: off-by-two error in aperture.c	2007-05-11 12:53:00 -07:00
pci-nommu.c	[PATCH] x86-64: dma_ops as const	2007-05-02 19:27:06 +02:00
pci-swiotlb.c	[PATCH] x86-64: dma_ops as const	2007-05-02 19:27:06 +02:00
pmtimer.c	[PATCH] time: x86_64: convert x86_64 to use GENERIC_TIME	2007-02-16 08:14:00 -08:00
process.c	x86_64: Quicklist support for x86_64	2007-07-21 18:37:09 -07:00
ptrace.c	Handle bogus %cs selector in single-step instruction decoding	2007-07-18 12:09:01 -07:00
reboot.c	Detach sched.h from mm.h	2007-05-21 09:18:19 -07:00
relocate_kernel.S	[PATCH] Avoid overwriting the current pgd (V4, x86_64)	2006-09-26 10:52:38 +02:00
setup64.c	x86_64: Ignore compat mode SYSCALL when IA32_EMULATION is not defined	2007-06-22 18:41:19 -07:00
setup.c	i386: Add L3 cache support to AMD CPUID4 emulation	2007-07-21 18:37:08 -07:00
signal.c	header cleaning: don't include smp_lock.h when not used	2007-05-08 11:15:07 -07:00
smp.c	x86_64: Quicklist support for x86_64	2007-07-21 18:37:09 -07:00
smpboot.c	header cleaning: don't include smp_lock.h when not used	2007-05-08 11:15:07 -07:00
stacktrace.c	simplify the stacktrace code	2007-05-08 11:14:58 -07:00
suspend_asm.S	[PATCH] x86-64: Relocatable Kernel Support	2007-05-02 19:27:07 +02:00
suspend.c	[PATCH] x86: Save and restore the fixed-range MTRRs of the BSP when suspending	2007-05-02 19:27:17 +02:00
sys_x86_64.c	header cleaning: don't include smp_lock.h when not used	2007-05-08 11:15:07 -07:00
syscall.c	[PATCH] x86-64: Auto compute __NR_syscall_max at compile time	2007-05-02 19:27:18 +02:00
tce.c	Remove all inclusions of <linux/config.h>	2006-10-04 03:38:54 -04:00
time.c	x86_64: time.c white space wreckage cleanup	2007-07-21 18:37:09 -07:00
trampoline.S	[PATCH] x86-64: Move cpu verification code to common file	2007-05-02 19:27:08 +02:00
traps.c	drivers/edac: add new nmi rescan	2007-07-19 10:04:53 -07:00
tsc_sync.c	[PATCH] x86: Log reason why TSC was marked unstable	2007-05-02 19:27:08 +02:00
tsc.c	x86_64: Remove dead code and other janitor work in tsc.c	2007-07-21 18:37:08 -07:00
verify_cpu.S	Unify the CPU features vectors between i386 and x86-64	2007-07-12 10:55:54 -07:00
vmlinux.lds.S	x86_64: Add vDSO for x86-64 with gettimeofday/clock_gettime/getcpu	2007-07-21 18:37:08 -07:00
vsmp.c	[PATCH] Fix build breakage with CONFIG_X86_VSMP	2006-10-12 12:25:27 -07:00
vsyscall.c	x86_64: Add vDSO for x86-64 with gettimeofday/clock_gettime/getcpu	2007-07-21 18:37:08 -07:00
x8664_ksyms.c	[PATCH] x86: Export _proxy_pda for gcc 4.2	2007-03-16 21:07:36 +01:00