On Wed, Aug 21, 2019 at 02:31:47PM +0200, Christian König wrote:
Additional to readers and writers add another class of operations which never participate in implicit synchronization.
Signed-off-by: Christian König christian.koenig@amd.com
drivers/dma-buf/dma-resv.c | 27 ++++++++++++++++++++++++--- include/linux/dma-resv.h | 2 ++ 2 files changed, 26 insertions(+), 3 deletions(-)
diff --git a/drivers/dma-buf/dma-resv.c b/drivers/dma-buf/dma-resv.c index 8ef7dbc7fd8e..c6dd6c36dba2 100644 --- a/drivers/dma-buf/dma-resv.c +++ b/drivers/dma-buf/dma-resv.c @@ -280,6 +280,7 @@ void dma_resv_init(struct dma_resv *obj)
dma_resv_fences_init(&obj->writers); dma_resv_fences_init(&obj->readers);
- dma_resv_fences_init(&obj->others);
} EXPORT_SYMBOL(dma_resv_init);
@@ -295,6 +296,7 @@ void dma_resv_fini(struct dma_resv *obj) */ dma_resv_fences_fini(&obj->writers); dma_resv_fences_fini(&obj->readers);
- dma_resv_fences_fini(&obj->others); ww_mutex_destroy(&obj->lock);
} EXPORT_SYMBOL(dma_resv_fini); @@ -334,6 +336,10 @@ void dma_resv_prune_fences(struct dma_resv *obj) fence = dma_resv_fences_deref(obj, &obj->readers); if (dma_fence_is_signaled(fence)) dma_resv_fences_set(obj, &obj->readers, NULL);
- fence = dma_resv_fences_deref(obj, &obj->others);
- if (dma_fence_is_signaled(fence))
dma_resv_fences_set(obj, &obj->others, NULL);} EXPORT_SYMBOL(dma_resv_prune_fences);
@@ -346,17 +352,19 @@ EXPORT_SYMBOL(dma_resv_prune_fences); */ int dma_resv_copy_fences(struct dma_resv *dst, struct dma_resv *src) {
- struct dma_fence *writers, *readers;
struct dma_fence *writers, *readers, *others;
dma_resv_assert_held(dst);
rcu_read_lock(); writers = dma_resv_fences_get_rcu(&src->writers); readers = dma_resv_fences_get_rcu(&src->readers);
others = dma_resv_fences_get_rcu(&src->others); rcu_read_unlock();
dma_resv_fences_set(dst, &dst->writers, writers); dma_resv_fences_set(dst, &dst->readers, readers);
dma_resv_fences_set(dst, &dst->readers, others);
^^^^^^^
others?