A bit overkill since, for example, the rcu_dereference_protected() in reservation_object_get_list() will WARN. But this is much less subtle for folks reading the code.
Signed-off-by: Rob Clark robdclark@gmail.com --- drivers/dma-buf/reservation.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/drivers/dma-buf/reservation.c b/drivers/dma-buf/reservation.c index c0bd572..0de3ea6 100644 --- a/drivers/dma-buf/reservation.c +++ b/drivers/dma-buf/reservation.c @@ -52,6 +52,8 @@ int reservation_object_reserve_shared(struct reservation_object *obj) struct reservation_object_list *fobj, *old; u32 max;
+ WARN_ON(!ww_mutex_is_locked(&obj->lock)); + old = reservation_object_get_list(obj);
if (old && old->shared_max) { @@ -189,6 +191,8 @@ void reservation_object_add_shared_fence(struct reservation_object *obj, { struct reservation_object_list *old, *fobj = obj->staged;
+ WARN_ON(!ww_mutex_is_locked(&obj->lock)); + old = reservation_object_get_list(obj); obj->staged = NULL;
@@ -207,6 +211,8 @@ void reservation_object_add_excl_fence(struct reservation_object *obj, struct reservation_object_list *old; u32 i = 0;
+ WARN_ON(!ww_mutex_is_locked(&obj->lock)); + old = reservation_object_get_list(obj); if (old) i = old->shared_count;