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dma-buf: remove shared fence staging in reservation object

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No need for that any more. Just replace the list when there isn't enough
room any more for the additional fence.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Junwei Zhang <Jerry.Zhang@amd.com>
Reviewed-by: Huang Rui <ray.huang@amd.com>
Link: https://patchwork.kernel.org/patch/10626143/
This commit is contained in:
Christian König
2018-08-08 16:01:22 +02:00
parent 9d32bdbb5b
commit 27836b641c
2 changed files with 58 additions and 124 deletions
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4
include/linux/reservation.h
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@@ -68,7 +68,6 @@ struct reservation_object_list {
* @seq: sequence count for managing RCU read-side synchronization
* @fence_excl: the exclusive fence, if there is one currently
* @fence: list of current shared fences
* @staged: staged copy of shared fences for RCU updates
*/
struct reservation_object {
struct ww_mutex lock;
@@ -76,7 +75,6 @@ struct reservation_object {
struct dma_fence __rcu *fence_excl;
struct reservation_object_list __rcu *fence;
struct reservation_object_list *staged;
};
#define reservation_object_held(obj) lockdep_is_held(&(obj)->lock.base)
@@ -95,7 +93,6 @@ reservation_object_init(struct reservation_object *obj)
__seqcount_init(&obj->seq, reservation_seqcount_string, &reservation_seqcount_class);
RCU_INIT_POINTER(obj->fence, NULL);
RCU_INIT_POINTER(obj->fence_excl, NULL);
obj->staged = NULL;
}
/**
@@ -124,7 +121,6 @@ reservation_object_fini(struct reservation_object *obj)
kfree(fobj);
}
kfree(obj->staged);
ww_mutex_destroy(&obj->lock);
}