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 <[email protected]> --- v2: remove erroneous check from reservation_object_get_excl --- drivers/dma-buf/reservation.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/dma-buf/reservation.c b/drivers/dma-buf/reservation.c index b44d9d7db347..accd398e2ea6 100644 --- a/drivers/dma-buf/reservation.c +++ b/drivers/dma-buf/reservation.c @@ -71,6 +71,8 @@ int reservation_object_reserve_shared(struct reservation_object *obj) struct reservation_object_list *fobj, *old; u32 max; + reservation_object_assert_held(obj); + old = reservation_object_get_list(obj); if (old && old->shared_max) { @@ -211,6 +213,8 @@ void reservation_object_add_shared_fence(struct reservation_object *obj, { struct reservation_object_list *old, *fobj = obj->staged; + reservation_object_assert_held(obj); + old = reservation_object_get_list(obj); obj->staged = NULL; @@ -236,6 +240,8 @@ 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; @@ -276,6 +282,8 @@ 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); -- 2.11.0 _______________________________________________ dri-devel mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/dri-devel
