diff mbox series

[03/20] dma-buf: Use atomic_fetch_add() for the context id

Message ID 20200511075722.13483-3-chris@chris-wilson.co.uk (mailing list archive)
State New, archived
Headers show
Series [01/20] drm/i915/gt: Mark up the racy read of execlists->context_tag | expand

Commit Message

Chris Wilson May 11, 2020, 7:57 a.m. UTC 
Now that atomic64_fetch_add() exists we can use it to return the base
context id, rather than the atomic64_add_return(N) - N concoction.

Suggested-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
---
 drivers/dma-buf/dma-fence.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/dma-buf/dma-fence.c b/drivers/dma-buf/dma-fence.c
index 052a41e2451c..90edf2b281b0 100644
--- a/drivers/dma-buf/dma-fence.c
+++ b/drivers/dma-buf/dma-fence.c
@@ -106,7 +106,7 @@  EXPORT_SYMBOL(dma_fence_get_stub);
 u64 dma_fence_context_alloc(unsigned num)
 {
 	WARN_ON(!num);
-	return atomic64_add_return(num, &dma_fence_context_counter) - num;
+	return atomic64_fetch_add(num, &dma_fence_context_counter);
 }
 EXPORT_SYMBOL(dma_fence_context_alloc);