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dma-buf/dma-fence: Extract __dma_fence_is_later()

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commit 8111477663 upstream.

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 <chris@chris-wilson.co.uk>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: Sean Paul <seanpaul@chromium.org>
Cc: Gustavo Padovan <gustavo@padovan.org>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170629125930.821-1-chris@chris-wilson.co.uk
[renamed to __fence_is_later() - gregkh]
Cc: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Chris Wilson
2017-06-29 13:59:24 +01:00
committed by Greg Kroah-Hartman
parent c13a05a801
commit b53525eaac
1 changed files with 14 additions and 1 deletions
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15
include/linux/fence.h
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@@ -280,6 +280,19 @@ fence_is_signaled(struct fence *fence)
return false;
}
/**
* __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 __fence_is_later(u32 f1, u32 f2)
{
return (int)(f1 - f2) > 0;
}
/**
* fence_is_later - return if f1 is chronologically later than f2
* @f1: [in] the first fence from the same context
@@ -293,7 +306,7 @@ static inline bool fence_is_later(struct fence *f1, struct fence *f2)
if (WARN_ON(f1->context != f2->context))
return false;
return (int)(f1->seqno - f2->seqno) > 0;
return __fence_is_later(f1->seqno, f2->seqno);
}
/**