Thomas Gleixner 0a7992c908 acpi: fix bogus preemption logic ... The ACPI_PREEMPTION_POINT() logic was introduced in commit 8bd108d (ACPICA: add preemption point after each opcode parse). The follow up commits abe1dfab6, 138d15692, c084ca70 tried to fix the preemption logic back and forth, but nobody noticed that the usage of in_atomic_preempt_off() in that context is wrong. The check which guards the call of cond_resched() is: if (!in_atomic_preempt_off() && !irqs_disabled()) in_atomic_preempt_off() is not intended for general use as the comment above the macro definition clearly says: * Check whether we were atomic before we did preempt_disable(): * (used by the scheduler, *after* releasing the kernel lock) On a CONFIG_PREEMPT=n kernel the usage of in_atomic_preempt_off() works by accident, but with CONFIG_PREEMPT=y it's just broken. The whole purpose of the ACPI_PREEMPTION_POINT() is to reduce the latency on a CONFIG_PREEMPT=n kernel, so make ACPI_PREEMPTION_POINT() depend on CONFIG_PREEMPT=n and remove the in_atomic_preempt_off() check. Addresses https://bugzilla.kernel.org/show_bug.cgi?id=16210 [akpm@linux-foundation.org: fix build] Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Len Brown <lenb@kernel.org> Cc: Francois Valenduc <francois.valenduc@tvcablenet.be> Cc: Lin Ming <ming.m.lin@intel.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2010-08-12 08:43:29 -07:00
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acpi	acpi: fix bogus preemption logic	2010-08-12 08:43:29 -07:00
asm-generic	dma-mapping: remove dma_is_consistent API	2010-08-11 08:59:21 -07:00
crypto
drm	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq	2010-08-07 12:42:58 -07:00
keys	DNS: Separate out CIFS DNS Resolver code	2010-08-05 17:17:51 +00:00
linux	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2010-08-11 09:23:32 -07:00
math-emu
media	V4L/DVB: cx2341x: convert to the control framework	2010-08-08 23:43:05 -03:00
mtd	mtd: Update copyright notices	2010-08-08 20:58:20 +01:00
net	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6	2010-08-06 13:30:43 -07:00
pcmcia
rdma
rxrpc
scsi	scsi: use __uX types for headers exported to user space	2010-08-11 08:59:01 -07:00
sound	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6	2010-08-07 17:07:31 -07:00
trace	Merge branch 'for-2.6.36' of git://git.kernel.dk/linux-2.6-block	2010-08-10 15:22:42 -07:00
video
xen
Kbuild