-
- if (rw == BTRFS_WRITE_LOCK_BLOCKING) {
- BUG_ON(atomic_read(&eb->blocking_writers) != 1);
- write_lock(&eb->lock);
- WARN_ON(atomic_read(&eb->spinning_writers));
- atomic_inc(&eb->spinning_writers);
- /* atomic_dec_and_test implies a barrier */
- if (atomic_dec_and_test(&eb->blocking_writers))
- cond_wake_up_nomb(&eb->write_lock_wq);
- } else if (rw == BTRFS_READ_LOCK_BLOCKING) {
- BUG_ON(atomic_read(&eb->blocking_readers) == 0);
- read_lock(&eb->lock);
- atomic_inc(&eb->spinning_readers);
- /* atomic_dec_and_test implies a barrier */
- if (atomic_dec_and_test(&eb->blocking_readers))
- cond_wake_up_nomb(&eb->read_lock_wq);
- }
+ BUG_ON(atomic_read(&eb->blocking_writers) != 1);
+ write_lock(&eb->lock);
+ WARN_ON(atomic_read(&eb->spinning_writers));
+ atomic_inc(&eb->spinning_writers);
+ /* atomic_dec_and_test implies a barrier */
+ if (atomic_dec_and_test(&eb->blocking_writers))
+ cond_wake_up_nomb(&eb->write_lock_wq);