From 8111477663813caa1a4469cfe6afaae36cd04513 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Thu, 29 Jun 2017 13:59:24 +0100 Subject: [PATCH] dma-buf/dma-fence: Extract __dma_fence_is_later() Often we have the task of comparing two seqno known to be on the same context, so provide a common __dma_fence_is_later(). Signed-off-by: Chris Wilson Cc: Sumit Semwal Cc: Sean Paul Cc: Gustavo Padovan Reviewed-by: Sean Paul Signed-off-by: Gustavo Padovan Link: http://patchwork.freedesktop.org/patch/msgid/20170629125930.821-1-chris@chris-wilson.co.uk --- include/linux/dma-fence.h | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/include/linux/dma-fence.h b/include/linux/dma-fence.h index a5195a7d6f77..ac5987989e9a 100644 --- a/include/linux/dma-fence.h +++ b/include/linux/dma-fence.h @@ -335,6 +335,19 @@ dma_fence_is_signaled(struct dma_fence *fence) return false; } +/** + * __dma_fence_is_later - return if f1 is chronologically later than f2 + * @f1: [in] the first fence's seqno + * @f2: [in] the second fence's seqno from the same context + * + * Returns true if f1 is chronologically later than f2. Both fences must be + * from the same context, since a seqno is not common across contexts. + */ +static inline bool __dma_fence_is_later(u32 f1, u32 f2) +{ + return (int)(f1 - f2) > 0; +} + /** * dma_fence_is_later - return if f1 is chronologically later than f2 * @f1: [in] the first fence from the same context @@ -349,7 +362,7 @@ static inline bool dma_fence_is_later(struct dma_fence *f1, if (WARN_ON(f1->context != f2->context)) return false; - return (int)(f1->seqno - f2->seqno) > 0; + return __dma_fence_is_later(f1->seqno, f2->seqno); } /** -- 2.30.2