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Commit 06fba6d4 authored by Thomas Hellstrom's avatar Thomas Hellstrom Committed by Dave Airlie
Browse files

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: default avatarThomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent dbc4a5b8

drivers/gpu/drm/ttm/ttm_bo.c

+6 −0
Original line number Diff line number Diff line
@@ -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);

}