}
EXPORT_SYMBOL(dma_resv_reserve_shared);
+#ifdef CONFIG_DEBUG_MUTEXES
+/**
+ * dma_resv_reset_shared_max - reset shared fences for debugging
+ * @obj: the dma_resv object to reset
+ *
+ * Reset the number of pre-reserved shared slots to test that drivers do
+ * correct slot allocation using dma_resv_reserve_shared(). See also
+ * &dma_resv_list.shared_max.
+ */
+void dma_resv_reset_shared_max(struct dma_resv *obj)
+{
+ /* Test shared fence slot reservation */
+ if (rcu_access_pointer(obj->fence)) {
+ struct dma_resv_list *fence = dma_resv_get_list(obj);
+
+ fence->shared_max = fence->shared_count;
+ }
+}
+#endif
+
/**
* dma_resv_add_shared_fence - Add a fence to a shared slot
* @obj: the reservation object
dma_resv_held(obj));
}
+#ifdef CONFIG_DEBUG_MUTEXES
+void dma_resv_reset_shared_max(struct dma_resv *obj);
+#else
+static inline void dma_resv_reset_shared_max(struct dma_resv *obj) {}
+#endif
+
/**
* dma_resv_lock - lock the reservation object
* @obj: the reservation object
*/
static inline void dma_resv_unlock(struct dma_resv *obj)
{
-#ifdef CONFIG_DEBUG_MUTEXES
- /* Test shared fence slot reservation */
- if (rcu_access_pointer(obj->fence)) {
- struct dma_resv_list *fence = dma_resv_get_list(obj);
-
- fence->shared_max = fence->shared_count;
- }
-#endif
+ dma_resv_reset_shared_max(obj);
ww_mutex_unlock(&obj->lock);
}