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author | Ingo Molnar <mingo@kernel.org> | 2017-09-04 11:01:18 +0200 |
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committer | Ingo Molnar <mingo@kernel.org> | 2017-09-04 11:01:18 +0200 |
commit | edc2988c548db05e33b921fed15821010bc74895 (patch) | |
tree | b35860428acea35e5866d4cf007519ed943a85de /include/linux/dma-fence.h | |
parent | locking/lockdep/selftests: Fix mixed read-write ABBA tests (diff) | |
parent | Merge branch 'docs-next' of git://git.lwn.net/linux (diff) | |
download | linux-dev-edc2988c548db05e33b921fed15821010bc74895.tar.xz linux-dev-edc2988c548db05e33b921fed15821010bc74895.zip |
Merge branch 'linus' into locking/core, to fix up conflicts
Conflicts:
mm/page_alloc.c
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/dma-fence.h')
-rw-r--r-- | include/linux/dma-fence.h | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/include/linux/dma-fence.h b/include/linux/dma-fence.h index 0a186c4f3981..171895072435 100644 --- a/include/linux/dma-fence.h +++ b/include/linux/dma-fence.h @@ -338,6 +338,19 @@ dma_fence_is_signaled(struct dma_fence *fence) } /** + * __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 * @f2: [in] the second fence from the same context @@ -351,7 +364,7 @@ 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); } /** @@ -418,8 +431,8 @@ int dma_fence_get_status(struct dma_fence *fence); static inline void dma_fence_set_error(struct dma_fence *fence, int error) { - BUG_ON(test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags)); - BUG_ON(error >= 0 || error < -MAX_ERRNO); + WARN_ON(test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags)); + WARN_ON(error >= 0 || error < -MAX_ERRNO); fence->error = error; } |