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35d5d08a08
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Andrew Morton 35d5d08a08 x86: disable preemption in delay_tsc() 
Marin Mitov points out that delay_tsc() can misbehave if it is preempted and
rescheduled on a different CPU which has a skewed TSC.  Fix it by disabling
preemption.

(I assume that the worst-case behaviour here is a stall of 2^32 cycles)

Cc: Andi Kleen <ak@suse.de>
Cc: Marin Mitov <mitov@issp.bas.bg>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-11-14 18:45:44 -08:00
..
alpha alpha: sg_virt() fallout 2007-10-23 12:31:05 +02:00
arm Merge branch 'release' of git://lm-sensors.org/kernel/mhoffman/hwmon-2.6 2007-11-13 09:09:36 -08:00
avr32 [AVR32] ARRAY_SIZE() cleanup 2007-10-23 11:20:26 +02:00
blackfin Blackfin arch: reclaim a few bytes from the end of our init section 2007-10-30 12:00:02 +08:00
cris cris gpio: undo locks before returning 2007-11-14 18:45:42 -08:00
frv FRV: Remove the section annotation on free_initmem() 2007-11-09 15:02:25 -08:00
h8300 Kbuild/doc: fix links to Documentation files 2007-10-30 14:26:30 -07:00
ia64 Add IORESOUCE_BUSY flag for System RAM 2007-11-14 18:45:39 -08:00
m32r spelling fixes: arch/m32r/ 2007-10-20 01:14:39 +02:00
m68k m68k: sg fallout 2007-10-24 08:55:40 +02:00
m68knommu m68knommu: mark mem init functions as __init 2007-10-23 20:45:44 -07:00
mips mips: undo locking on error path returns 2007-11-14 18:45:42 -08:00
parisc parisc: fix sg_page() fallout 2007-10-23 09:49:31 +02:00
powerpc [POWERPC] Silence an annoying boot message 2007-11-13 16:23:47 +11:00
ppc [POWERPC] Avoid unpaired stwcx. on some processors 2007-11-13 16:22:43 +11:00
s390 sched: restore deterministic CPU accounting on powerpc 2007-11-09 22:39:38 +01:00
sh Merge branch 'page_colouring_despair' 2007-11-08 17:01:42 +09:00
sh64 sh64: Kill off duplicate includes. 2007-11-05 12:18:17 +09:00
sparc [SPARC]: Remove duplicate includes. 2007-11-06 21:23:11 -08:00
sparc64 [SPARC]: Remove duplicate includes. 2007-11-06 21:23:11 -08:00
um uml: fix build for !CONFIG_PRINTK 2007-11-14 18:45:43 -08:00
v850 spelling fixes: arch/v850/ 2007-10-20 01:24:05 +02:00
x86 x86: disable preemption in delay_tsc() 2007-11-14 18:45:44 -08:00
xtensa Kbuild/doc: fix links to Documentation files 2007-10-30 14:26:30 -07:00