The read_locks are a simple counter to track locking balance and used to assert tree locks. Add helpers to make it conditionally work only in DEBUG builds. Will be used in followup patches.
Signed-off-by: David Sterba <[email protected]> --- fs/btrfs/locking.c | 25 ++++++++++++++++++------- 1 file changed, 18 insertions(+), 7 deletions(-) diff --git a/fs/btrfs/locking.c b/fs/btrfs/locking.c index ce9dc985ce05..947c66c01e34 100644 --- a/fs/btrfs/locking.c +++ b/fs/btrfs/locking.c @@ -12,8 +12,6 @@ #include "extent_io.h" #include "locking.h" -static void btrfs_assert_tree_read_locked(struct extent_buffer *eb); - #ifdef CONFIG_BTRFS_DEBUG static void btrfs_assert_spinning_writers_get(struct extent_buffer *eb) { @@ -43,12 +41,30 @@ static void btrfs_assert_spinning_readers_put(struct extent_buffer *eb) atomic_dec(&eb->spinning_readers); } +static void btrfs_assert_tree_read_locks_get(struct extent_buffer *eb) +{ + atomic_inc(&eb->read_locks); +} + +static void btrfs_assert_tree_read_locks_put(struct extent_buffer *eb) +{ + atomic_dec(&eb->read_locks); +} + +static void btrfs_assert_tree_read_locked(struct extent_buffer *eb) +{ + BUG_ON(!atomic_read(&eb->read_locks)); +} + #else static void btrfs_assert_spinning_writers_get(struct extent_buffer *eb) { } static void btrfs_assert_spinning_writers_put(struct extent_buffer *eb) { } static void btrfs_assert_no_spinning_writers(struct extent_buffer *eb) { } static void btrfs_assert_spinning_readers_put(struct extent_buffer *eb) { } static void btrfs_assert_spinning_readers_get(struct extent_buffer *eb) { } +static void btrfs_assert_tree_read_locked(struct extent_buffer *eb) { } +static void btrfs_assert_tree_read_locks_get(struct extent_buffer *eb) { } +static void btrfs_assert_tree_read_locks_put(struct extent_buffer *eb) { } #endif void btrfs_set_lock_blocking_read(struct extent_buffer *eb) @@ -309,8 +325,3 @@ void btrfs_assert_tree_locked(struct extent_buffer *eb) { BUG_ON(!atomic_read(&eb->write_locks)); } - -static void btrfs_assert_tree_read_locked(struct extent_buffer *eb) -{ - BUG_ON(!atomic_read(&eb->read_locks)); -} -- 2.20.1
