dma-buf: add some lockdep asserts to the reservation object implementation
This adds lockdep asserts to the reservation functions which state in their documentation that obj->lock must be held. Allows builds with PROVE_LOCKING enabled to check that the locking requirements are met. Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Reviewed-by: Christian König <christian.koenig@amd.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180111165302.25556-1-l.stach@pengutronix.de
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@ -73,6 +73,8 @@ int reservation_object_reserve_shared(struct reservation_object *obj,
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struct reservation_object_list *old, *new;
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unsigned int i, j, k, max;
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reservation_object_assert_held(obj);
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old = reservation_object_get_list(obj);
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if (old && old->shared_max) {
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@ -151,6 +153,8 @@ void reservation_object_add_shared_fence(struct reservation_object *obj,
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dma_fence_get(fence);
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reservation_object_assert_held(obj);
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fobj = reservation_object_get_list(obj);
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count = fobj->shared_count;
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@ -196,6 +200,8 @@ void reservation_object_add_excl_fence(struct reservation_object *obj,
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struct reservation_object_list *old;
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u32 i = 0;
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reservation_object_assert_held(obj);
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old = reservation_object_get_list(obj);
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if (old)
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i = old->shared_count;
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@ -236,6 +242,8 @@ int reservation_object_copy_fences(struct reservation_object *dst,
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size_t size;
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unsigned i;
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reservation_object_assert_held(dst);
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rcu_read_lock();
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src_list = rcu_dereference(src->fence);
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