bcachefs: Kill bch2_assert_btree_nodes_not_locked()

We no longer track individual btree node locks with lockdep, so this
will never be enabled.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

fs/bcachefs/btree_io.c

@@ -46,8 +46,6 @@ void bch2_btree_node_io_unlock(struct btree *b)
 
 void bch2_btree_node_io_lock(struct btree *b)
 {
-	bch2_assert_btree_nodes_not_locked();
-
 	wait_on_bit_lock_io(&b->flags, BTREE_NODE_write_in_flight,
 			    TASK_UNINTERRUPTIBLE);
 }
@@ -66,16 +64,12 @@ void __bch2_btree_node_wait_on_write(struct btree *b)
 
 void bch2_btree_node_wait_on_read(struct btree *b)
 {
-	bch2_assert_btree_nodes_not_locked();
-
 	wait_on_bit_io(&b->flags, BTREE_NODE_read_in_flight,
 		       TASK_UNINTERRUPTIBLE);
 }
 
 void bch2_btree_node_wait_on_write(struct btree *b)
 {
-	bch2_assert_btree_nodes_not_locked();
-
 	wait_on_bit_io(&b->flags, BTREE_NODE_write_in_flight,
 		       TASK_UNINTERRUPTIBLE);
 }

fs/bcachefs/btree_locking.c

@@ -13,16 +13,6 @@ void bch2_btree_lock_init(struct btree_bkey_cached_common *b,
 	lockdep_set_notrack_class(&b->lock);
 }
 
-#ifdef CONFIG_LOCKDEP
-void bch2_assert_btree_nodes_not_locked(void)
-{
-#if 0
-	//Re-enable when lock_class_is_held() is merged:
-	BUG_ON(lock_class_is_held(&bch2_btree_node_lock_key));
-#endif
-}
-#endif
-
 /* Btree node locking: */
 
 struct six_lock_count bch2_btree_node_lock_counts(struct btree_trans *trans,

fs/bcachefs/btree_locking.h

@@ -15,12 +15,6 @@
 
 void bch2_btree_lock_init(struct btree_bkey_cached_common *, enum six_lock_init_flags);
 
-#ifdef CONFIG_LOCKDEP
-void bch2_assert_btree_nodes_not_locked(void);
-#else
-static inline void bch2_assert_btree_nodes_not_locked(void) {}
-#endif
-
 void bch2_trans_unlock_noassert(struct btree_trans *);
 
 static inline bool is_btree_node(struct btree_path *path, unsigned l)