[Intel-gfx] [PATCH 02/24] dma-buf: Use atomic_fetch_add() for the context id

[Patelczyk, Maciej]

Chris Wilson <chris at chris-wilson.co.uk> writes:

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

Looks good.

Reviewed-by: Maciej Patelczyk <maciej.patelczyk at intel.com>

-MaciejP.