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| author | Christian König <christian.koenig@amd.com> | 2021-05-10 16:14:09 +0200 |
|---|---|---|
| committer | Christian König <christian.koenig@amd.com> | 2021-06-06 11:17:58 +0200 |
| commit | 6edbd6abb783d54f6ac4c3ed5cd9e50cff6c15e9 (patch) | |
| tree | 341a16a1af131c43523e4da3a84f5f13657c75cb /include/linux/dma-resv.h | |
| parent | 415f6767d80761997f6dbe8b72864ca5eb3ddf40 (diff) | |
| download | linux-stable-6edbd6abb783d54f6ac4c3ed5cd9e50cff6c15e9.tar.gz linux-stable-6edbd6abb783d54f6ac4c3ed5cd9e50cff6c15e9.tar.bz2 linux-stable-6edbd6abb783d54f6ac4c3ed5cd9e50cff6c15e9.zip | |
dma-buf: rename and cleanup dma_resv_get_excl v3
When the comment needs to state explicitly that this
doesn't get a reference to the object then the function
is named rather badly.
Rename the function and use rcu_dereference_check(), this
way it can be used from both rcu as well as lock protected
critical sections.
v2: improve kerneldoc as suggested by Daniel
v3: use dma_resv_excl_fence as function name
Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20210602111714.212426-4-christian.koenig@amd.com
Diffstat (limited to 'include/linux/dma-resv.h')
| -rw-r--r-- | include/linux/dma-resv.h | 14 |
1 files changed, 6 insertions, 8 deletions
diff --git a/include/linux/dma-resv.h b/include/linux/dma-resv.h index f32a3d176513..e3a7f740bb06 100644 --- a/include/linux/dma-resv.h +++ b/include/linux/dma-resv.h @@ -226,22 +226,20 @@ static inline void dma_resv_unlock(struct dma_resv *obj) } /** - * dma_resv_get_excl - get the reservation object's - * exclusive fence, with update-side lock held + * dma_resv_exclusive - return the object's exclusive fence * @obj: the reservation object * - * Returns the exclusive fence (if any). Does NOT take a - * reference. Writers must hold obj->lock, readers may only - * hold a RCU read side lock. + * Returns the exclusive fence (if any). Caller must either hold the objects + * through dma_resv_lock() or the RCU read side lock through rcu_read_lock(), + * or one of the variants of each * * RETURNS * The exclusive fence or NULL */ static inline struct dma_fence * -dma_resv_get_excl(struct dma_resv *obj) +dma_resv_excl_fence(struct dma_resv *obj) { - return rcu_dereference_protected(obj->fence_excl, - dma_resv_held(obj)); + return rcu_dereference_check(obj->fence_excl, dma_resv_held(obj)); } /** |