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| author | Christian König <christian.koenig@amd.com> | 2022-03-11 10:27:53 +0100 |
|---|---|---|
| committer | Christian König <christian.koenig@amd.com> | 2022-03-25 14:18:28 +0100 |
| commit | 64a8f92fd783e750cdb81af75942dcd53bbf61bd (patch) | |
| tree | cbddd8445aae570b7a0cca7fd66c4c9245fcdd34 /include/linux/dma-fence-chain.h | |
| parent | caaf2ae712b7cc3c7717898fe267dbf882a502ef (diff) | |
| download | linux-64a8f92fd783e750cdb81af75942dcd53bbf61bd.tar.bz2 | |
dma-buf: add dma_fence_unwrap v2
Add a general purpose helper to deep dive into dma_fence_chain/dma_fence_array
structures and iterate over all the fences in them.
This is useful when we need to flatten out all fences in those structures.
v2: some selftests cleanup, improved function naming and documentation
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20220311110244.1245-1-christian.koenig@amd.com
Diffstat (limited to 'include/linux/dma-fence-chain.h')
| -rw-r--r-- | include/linux/dma-fence-chain.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/dma-fence-chain.h b/include/linux/dma-fence-chain.h index 10d51bcdf7b7..4bdf0b96da28 100644 --- a/include/linux/dma-fence-chain.h +++ b/include/linux/dma-fence-chain.h @@ -112,6 +112,8 @@ static inline void dma_fence_chain_free(struct dma_fence_chain *chain) * * Iterate over all fences in the chain. We keep a reference to the current * fence while inside the loop which must be dropped when breaking out. + * + * For a deep dive iterator see dma_fence_unwrap_for_each(). */ #define dma_fence_chain_for_each(iter, head) \ for (iter = dma_fence_get(head); iter; \ |