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(parent: c4cc383) | patch
drm/vblank: Use memory barriers optimized for atomic_t instead of generics.
authorMario Kleiner <mario.kleiner@tuebingen.mpg.de>
Mon, 21 Feb 2011 04:42:01 +0000 (05:42 +0100)
committerDave Airlie <airlied@redhat.com>
Wed, 23 Feb 2011 00:08:46 +0000 (10:08 +1000)
commitbc21512835a72bc1eab7abd7d8a1bff0435591d7
tree015b9212d6fbd176dcbe141d5d96ee30d4bf1a76tree | snapshot
parentc4cc383915549cf14f027f374904e30c13653daccommit | diff
drm/vblank: Use memory barriers optimized for atomic_t instead of generics.

Documentation/atomic_ops.txt tells us that there are memory
barriers optimized for atomic_inc and other atomic_t ops.

Use these instead of smp_wmb(), and also to make the required
memory barriers around vblank counter increments more explicit.

Signed-off-by: Mario Kleiner <mario.kleiner@tuebingen.mpg.de>
Signed-off-by: Dave Airlie <airlied@redhat.com>
drivers/gpu/drm/drm_irq.c diff | blob | history
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