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dma-buf: Use atomic_fetch_add() for the context id

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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>
Reviewed-by: Maciej Patelczyk <maciej.patelczyk@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200513074809.18194-2-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2020-05-13 08:47:47 +01:00
parent 761e9f4f80
commit 1c530d431c
1 changed files with 1 additions and 1 deletions
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2
drivers/dma-buf/dma-fence.c
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@ -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);