diff options
author | Thomas Hellstrom <thellstrom@vmware.com> | 2010-10-29 10:46:48 +0200 |
---|---|---|
committer | Dave Airlie <airlied@redhat.com> | 2010-11-09 13:33:49 +1000 |
commit | 06fba6d4168069d818593e2fcc2d4bd0f888e97b (patch) | |
tree | 25f0d1338da8942ef54b8ab926a48c1789317eee /drivers/gpu/drm/ttm | |
parent | dbc4a5b83585e89a6bce650d32426f61c8d4bca5 (diff) |
drm/ttm: Add a barrier when unreserving
Since we're doing this outside of a spinlock to provide the necessary
barriers, add an explicit barrier.
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/ttm')
-rw-r--r-- | drivers/gpu/drm/ttm/ttm_bo.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c index f561eead057d..a32fe41e5e24 100644 --- a/drivers/gpu/drm/ttm/ttm_bo.c +++ b/drivers/gpu/drm/ttm/ttm_bo.c @@ -37,6 +37,7 @@ #include <linux/mm.h> #include <linux/file.h> #include <linux/module.h> +#include <asm/atomic.h> #define TTM_ASSERT_LOCKED(param) #define TTM_DEBUG(fmt, arg...) @@ -444,6 +445,11 @@ static void ttm_bo_cleanup_memtype_use(struct ttm_buffer_object *bo) ttm_bo_mem_put(bo, &bo->mem); atomic_set(&bo->reserved, 0); + + /* + * Make processes trying to reserve really pick it up. + */ + smp_mb__after_atomic_dec(); wake_up_all(&bo->event_queue); } |