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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
This commit is contained in:
Lucas Stach 2017-06-13 10:26:46 +02:00
parent 60b801999c
commit 547c7138bc
1 changed files with 8 additions and 0 deletions
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8
drivers/dma-buf/reservation.c
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@ -73,6 +73,8 @@ int reservation_object_reserve_shared(struct reservation_object *obj,
struct reservation_object_list *old, *new;
unsigned int i, j, k, max;
reservation_object_assert_held(obj);
old = reservation_object_get_list(obj);
if (old && old->shared_max) {
@ -151,6 +153,8 @@ void reservation_object_add_shared_fence(struct reservation_object *obj,
dma_fence_get(fence);
reservation_object_assert_held(obj);
fobj = reservation_object_get_list(obj);
count = fobj->shared_count;
@ -196,6 +200,8 @@ void reservation_object_add_excl_fence(struct reservation_object *obj,
struct reservation_object_list *old;
u32 i = 0;
reservation_object_assert_held(obj);
old = reservation_object_get_list(obj);
if (old)
i = old->shared_count;
@ -236,6 +242,8 @@ int reservation_object_copy_fences(struct reservation_object *dst,
size_t size;
unsigned i;
reservation_object_assert_held(dst);
rcu_read_lock();
src_list = rcu_dereference(src->fence);