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drm/ttm: use ffs in ttm_mem_type_from_place 

A bit pointless to search for the first bit set manually.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2016-09-12 13:16:16 +02:00 committed by Alex Deucher
parent 5756b1558e
commit 5d98d0bcff
1 changed files with 7 additions and 7 deletions
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14
drivers/gpu/drm/ttm/ttm_bo.c
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@ -57,14 +57,14 @@ static struct attribute ttm_bo_count = {
static inline int ttm_mem_type_from_place(const struct ttm_place *place,
uint32_t *mem_type)
{
int i;
int pos;
for (i = 0; i <= TTM_PL_PRIV5; i++)
if (place->flags & (1 << i)) {
*mem_type = i;
return 0;
}
return -EINVAL;
pos = ffs(place->flags & TTM_PL_MASK_MEM);
if (unlikely(!pos))
return -EINVAL;
*mem_type = pos - 1;
return 0;
}
static void ttm_mem_type_debug(struct ttm_bo_device *bdev, int mem_type)