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| author | Nathan Chancellor <natechancellor@gmail.com> | 2018-10-02 09:41:24 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2018-10-10 01:06:00 +0300 |
| commit | c1f0320e03207255ef618d1bbfe0939d03c7cfac (patch) | |
| tree | 8ea3391f1b0f41b79c8d65c5459185cbfdbd1441 /drivers/gpu/drm/scheduler | |
| parent | 5e161e5442a8a209404542c91eb889487b1239f4 (diff) | |
| download | linux-c1f0320e03207255ef618d1bbfe0939d03c7cfac.tar.xz | |
drm/scheduler: Simplify spsc_queue_count check in drm_sched_entity_select_rq
Clang generates a warning when it sees a logical not followed by a
conditional operator like ==, >, or <.
drivers/gpu/drm/scheduler/sched_entity.c:470:6: warning: logical not is
only applied to the left hand side of this comparison
[-Wlogical-not-parentheses]
if (!spsc_queue_count(&entity->job_queue) == 0 ||
^ ~~
drivers/gpu/drm/scheduler/sched_entity.c:470:6: note: add parentheses
after the '!' to evaluate the comparison first
if (!spsc_queue_count(&entity->job_queue) == 0 ||
^
( )
drivers/gpu/drm/scheduler/sched_entity.c:470:6: note: add parentheses
around left hand side expression to silence this warning
if (!spsc_queue_count(&entity->job_queue) == 0 ||
^
( )
1 warning generated.
It assumes the author might have made a mistake in their logic:
if (!a == b) -> if (!(a == b))
Sometimes that is the case; other times, it's just a super convoluted
way of saying 'if (a)' when b = 0:
if (!1 == 0) -> if (0 == 0) -> if (true)
Alternatively:
if (!1 == 0) -> if (!!1) -> if (1)
Simplify this comparison so that Clang doesn't complain.
Fixes: 35e160e781a0 ("drm/scheduler: change entities rq even earlier")
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/scheduler')
| -rw-r--r-- | drivers/gpu/drm/scheduler/sched_entity.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/gpu/drm/scheduler/sched_entity.c b/drivers/gpu/drm/scheduler/sched_entity.c index 4e5e95c0cab5..3e22a54a99c2 100644 --- a/drivers/gpu/drm/scheduler/sched_entity.c +++ b/drivers/gpu/drm/scheduler/sched_entity.c @@ -467,8 +467,7 @@ void drm_sched_entity_select_rq(struct drm_sched_entity *entity) struct dma_fence *fence; struct drm_sched_rq *rq; - if (!spsc_queue_count(&entity->job_queue) == 0 || - entity->num_rq_list <= 1) + if (spsc_queue_count(&entity->job_queue) || entity->num_rq_list <= 1) return; fence = READ_ONCE(entity->last_scheduled); |