smp_request_block() in drivers/gpu/drm/msm/disp/mdp5/mdp5_smp.c calls bitmap_weight() to check if any bit of a given bitmap is set. It's better to use bitmap_empty() in that case because bitmap_empty() stops traversing the bitmap as soon as it finds first set bit, while bitmap_weight() counts all bits unconditionally.
Signed-off-by: Yury Norov yury.norov@gmail.com --- drivers/gpu/drm/msm/disp/mdp5/mdp5_smp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_smp.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_smp.c index d7fa2c49e741..56a3063545ec 100644 --- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_smp.c +++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_smp.c @@ -68,7 +68,7 @@ static int smp_request_block(struct mdp5_smp *smp, uint8_t reserved;
/* we shouldn't be requesting blocks for an in-use client: */ - WARN_ON(bitmap_weight(cs, cnt) > 0); + WARN_ON(!bitmap_empty(cs, cnt));
reserved = smp->reserved[cid];