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| author | Ingo Molnar | 2013-04-19 13:03:08 +0200 |
|---|---|---|
| committer | Ingo Molnar | 2013-04-19 13:03:08 +0200 |
| commit | 5379f8c0d72cab43bbe6d974ceb3ad84dddc2b8e (patch) | |
| tree | 524d8ac34cc8c7ef68b43e3ee6e08e27db86299c /include/linux/preempt.h | |
| parent | Merge tag 'please-pull-cmci_rediscover' of git://git.kernel.org/pub/scm/linux... (diff) | |
| parent | amd64_edac: Add Family 16h support (diff) | |
| download | kernel-qcow2-linux-5379f8c0d72cab43bbe6d974ceb3ad84dddc2b8e.tar.gz kernel-qcow2-linux-5379f8c0d72cab43bbe6d974ceb3ad84dddc2b8e.tar.xz kernel-qcow2-linux-5379f8c0d72cab43bbe6d974ceb3ad84dddc2b8e.zip | |
Merge tag 'edac_amd_f16h' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras into x86/ras
Pull AMD F16h support for amd64_edac from Borislav Petkov.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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 5a710b9c578e..87a03c746f17 100644 --- a/include/linux/preempt.h +++ b/include/linux/preempt.h @@ -93,14 +93,20 @@ do { \ #else /* !CONFIG_PREEMPT_COUNT */ -#define preempt_disable() do { } while (0) -#define sched_preempt_enable_no_resched() do { } while (0) -#define preempt_enable_no_resched() do { } while (0) -#define preempt_enable() 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 sched_preempt_enable_no_resched() barrier() +#define preempt_enable_no_resched() barrier() +#define preempt_enable() barrier() + +#define preempt_disable_notrace() barrier() +#define preempt_enable_no_resched_notrace() barrier() +#define preempt_enable_notrace() barrier() #endif /* CONFIG_PREEMPT_COUNT */ |