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| author | Mikulas Patocka <[email protected]> | 2012-10-22 23:37:47 +0000 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2012-10-28 17:59:36 +0000 |
| commit | 5c1eabe68501d1e1b1586c7f4c46cc531828c4ab (patch) | |
| tree | d97aab24d8d0abbd8378e7c851f7a55d266bb851 /security/selinux/netnode.c | |
| parent | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net (diff) | |
| download | kernel-5c1eabe68501d1e1b1586c7f4c46cc531828c4ab.tar.gz kernel-5c1eabe68501d1e1b1586c7f4c46cc531828c4ab.zip | |
percpu-rw-semaphores: use light/heavy barriers
This patch introduces new barrier pair light_mb() and heavy_mb() for
percpu rw semaphores.
This patch fixes a bug in percpu-rw-semaphores where a barrier was
missing in percpu_up_write.
This patch improves performance on the read path of
percpu-rw-semaphores: on non-x86 cpus, there was a smp_mb() in
percpu_up_read. This patch changes it to a compiler barrier and removes
the "#if defined(X86) ..." condition.
From: Lai Jiangshan <[email protected]>
Signed-off-by: Mikulas Patocka <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'security/selinux/netnode.c')
0 files changed, 0 insertions, 0 deletions