Use the helpers where open coded. On non-debug builds, the warnings will not trigger and extent_buffer::spining_readers become unused and can be moved to the appropriate section, saving a few bytes.
Signed-off-by: David Sterba <[email protected]> --- fs/btrfs/extent_io.c | 2 +- fs/btrfs/extent_io.h | 2 +- fs/btrfs/locking.c | 12 +++++------- 3 files changed, 7 insertions(+), 9 deletions(-) diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index 11a95919bb3e..30363cb97625 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -4672,7 +4672,6 @@ __alloc_extent_buffer(struct btrfs_fs_info *fs_info, u64 start, atomic_set(&eb->read_locks, 0); atomic_set(&eb->blocking_readers, 0); atomic_set(&eb->blocking_writers, 0); - atomic_set(&eb->spinning_readers, 0); eb->lock_nested = 0; init_waitqueue_head(&eb->write_lock_wq); init_waitqueue_head(&eb->read_lock_wq); @@ -4692,6 +4691,7 @@ __alloc_extent_buffer(struct btrfs_fs_info *fs_info, u64 start, #ifdef CONFIG_BTRFS_DEBUG atomic_set(&eb->spinning_writers, 0); + atomic_set(&eb->spinning_readers, 0); #endif return eb; diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h index c5eb261c1ea9..e49310d2caf4 100644 --- a/fs/btrfs/extent_io.h +++ b/fs/btrfs/extent_io.h @@ -151,7 +151,6 @@ struct extent_buffer { atomic_t read_locks; atomic_t blocking_writers; atomic_t blocking_readers; - atomic_t spinning_readers; short lock_nested; /* >= 0 if eb belongs to a log tree, -1 otherwise */ short log_index; @@ -171,6 +170,7 @@ struct extent_buffer { struct page *pages[INLINE_EXTENT_BUFFER_PAGES]; #ifdef CONFIG_BTRFS_DEBUG atomic_t spinning_writers; + atomic_t spinning_readers; struct list_head leak_list; #endif }; diff --git a/fs/btrfs/locking.c b/fs/btrfs/locking.c index 2dd3ae524aa3..ce9dc985ce05 100644 --- a/fs/btrfs/locking.c +++ b/fs/btrfs/locking.c @@ -62,8 +62,7 @@ void btrfs_set_lock_blocking_read(struct extent_buffer *eb) return; btrfs_assert_tree_read_locked(eb); atomic_inc(&eb->blocking_readers); - WARN_ON(atomic_read(&eb->spinning_readers) == 0); - atomic_dec(&eb->spinning_readers); + btrfs_assert_spinning_readers_put(eb); read_unlock(&eb->lock); } @@ -150,7 +149,7 @@ void btrfs_tree_read_lock(struct extent_buffer *eb) goto again; } atomic_inc(&eb->read_locks); - atomic_inc(&eb->spinning_readers); + btrfs_assert_spinning_readers_get(eb); } /* @@ -169,7 +168,7 @@ int btrfs_tree_read_lock_atomic(struct extent_buffer *eb) return 0; } atomic_inc(&eb->read_locks); - atomic_inc(&eb->spinning_readers); + btrfs_assert_spinning_readers_get(eb); return 1; } @@ -190,7 +189,7 @@ int btrfs_try_tree_read_lock(struct extent_buffer *eb) return 0; } atomic_inc(&eb->read_locks); - atomic_inc(&eb->spinning_readers); + btrfs_assert_spinning_readers_get(eb); return 1; } @@ -232,8 +231,7 @@ void btrfs_tree_read_unlock(struct extent_buffer *eb) return; } btrfs_assert_tree_read_locked(eb); - WARN_ON(atomic_read(&eb->spinning_readers) == 0); - atomic_dec(&eb->spinning_readers); + btrfs_assert_spinning_readers_put(eb); atomic_dec(&eb->read_locks); read_unlock(&eb->lock); } -- 2.20.1
