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| author | rogersb11 <brettrogers11@gmail.com> | 2015-11-10 11:19:31 -0600 |
|---|---|---|
| committer | rogersb11 <brettrogers11@gmail.com> | 2015-11-10 14:01:25 -0500 |
| commit | b4d16f70c34ecb908c8a61e58ea51fecdd4a4b10 (patch) | |
| tree | 973e9aeb97bb13497d17a43e6f3c070381bc5b87 /include/linux/preempt.h | |
| parent | d177fbc2f0c263b06c18bda2eb46200a31bcbebd (diff) | |
| parent | 5dba9ddd98cbc7ad319d687887981a0ea0062c75 (diff) | |
| download | kernel_samsung_smdk4412-b4d16f70c34ecb908c8a61e58ea51fecdd4a4b10.zip kernel_samsung_smdk4412-b4d16f70c34ecb908c8a61e58ea51fecdd4a4b10.tar.gz kernel_samsung_smdk4412-b4d16f70c34ecb908c8a61e58ea51fecdd4a4b10.tar.bz2 | |
Merge remote-tracking branch 'korg/linux-3.0.y' into cm-13.0
Conflicts:
crypto/algapi.c
drivers/gpu/drm/i915/i915_debugfs.c
drivers/gpu/drm/i915/intel_display.c
drivers/video/fbmem.c
include/linux/nls.h
kernel/cgroup.c
kernel/signal.c
kernel/timeconst.pl
net/ipv4/ping.c
Change-Id: I1f532925d1743df74d66bcdd6fc92f05c72ee0dd
Diffstat (limited to 'include/linux/preempt.h')
| -rw-r--r-- | include/linux/preempt.h | 22 |
1 files changed, 14 insertions, 8 deletions
diff --git a/include/linux/preempt.h b/include/linux/preempt.h index 2e681d9..d309dcb 100644 --- a/include/linux/preempt.h +++ b/include/linux/preempt.h @@ -82,14 +82,20 @@ do { \ #else -#define preempt_disable() do { } while (0) -#define preempt_enable_no_resched() do { } while (0) -#define preempt_enable() do { } while (0) -#define preempt_check_resched() do { } while (0) - -#define preempt_disable_notrace() do { } while (0) -#define preempt_enable_no_resched_notrace() do { } while (0) -#define preempt_enable_notrace() do { } while (0) +/* + * Even if we don't have any preemption, we need preempt disable/enable + * to be barriers, so that we don't have things like get_user/put_user + * that can cause faults and scheduling migrate into our preempt-protected + * region. + */ +#define preempt_disable() barrier() +#define preempt_enable_no_resched() barrier() +#define preempt_enable() barrier() +#define preempt_check_resched() barrier() + +#define preempt_disable_notrace() barrier() +#define preempt_enable_no_resched_notrace() barrier() +#define preempt_enable_notrace() barrier() #endif |