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| author | David Sterba <dsterba@suse.com> | 2018-08-24 16:24:26 +0200 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2019-04-29 19:02:21 +0200 |
| commit | c79adfc085c0662385cfcb55f15590303212e8e9 (patch) | |
| tree | 56de865729349310e8e70178deb57a392104a757 /fs | |
| parent | e3f153886702302482918a3788ba3bb24a37a4aa (diff) | |
| download | linux-c79adfc085c0662385cfcb55f15590303212e8e9.tar.gz linux-c79adfc085c0662385cfcb55f15590303212e8e9.tar.bz2 linux-c79adfc085c0662385cfcb55f15590303212e8e9.zip | |
btrfs: use assertion helpers for extent buffer write lock counters
Use the helpers where open coded. On non-debug builds, the warnings will
not trigger and extent_buffer::write_locks become unused and can be
moved to the appropriate section, saving a few bytes.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/extent_io.c | 2 | ||||
| -rw-r--r-- | fs/btrfs/extent_io.h | 3 | ||||
| -rw-r--r-- | fs/btrfs/locking.c | 6 |
3 files changed, 5 insertions, 6 deletions
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index c189b018ed69..97d32b80060d 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -4677,7 +4677,6 @@ __alloc_extent_buffer(struct btrfs_fs_info *fs_info, u64 start, eb->fs_info = fs_info; eb->bflags = 0; rwlock_init(&eb->lock); - atomic_set(&eb->write_locks, 0); atomic_set(&eb->blocking_readers, 0); atomic_set(&eb->blocking_writers, 0); eb->lock_nested = 0; @@ -4701,6 +4700,7 @@ __alloc_extent_buffer(struct btrfs_fs_info *fs_info, u64 start, atomic_set(&eb->spinning_writers, 0); atomic_set(&eb->spinning_readers, 0); atomic_set(&eb->read_locks, 0); + atomic_set(&eb->write_locks, 0); #endif return eb; diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h index 41c5d0e9dc75..43a9530279db 100644 --- a/fs/btrfs/extent_io.h +++ b/fs/btrfs/extent_io.h @@ -160,8 +160,6 @@ struct extent_buffer { struct rcu_head rcu_head; pid_t lock_owner; - /* count of read lock holders on the extent buffer */ - atomic_t write_locks; atomic_t blocking_writers; atomic_t blocking_readers; short lock_nested; @@ -185,6 +183,7 @@ struct extent_buffer { atomic_t spinning_writers; atomic_t spinning_readers; atomic_t read_locks; + atomic_t write_locks; struct list_head leak_list; #endif }; diff --git a/fs/btrfs/locking.c b/fs/btrfs/locking.c index 1c9bb0620e4b..3f7b5989e31e 100644 --- a/fs/btrfs/locking.c +++ b/fs/btrfs/locking.c @@ -243,7 +243,7 @@ int btrfs_try_tree_write_lock(struct extent_buffer *eb) write_unlock(&eb->lock); return 0; } - atomic_inc(&eb->write_locks); + btrfs_assert_tree_write_locks_get(eb); btrfs_assert_spinning_writers_get(eb); eb->lock_owner = current->pid; return 1; @@ -310,7 +310,7 @@ again: goto again; } btrfs_assert_spinning_writers_get(eb); - atomic_inc(&eb->write_locks); + btrfs_assert_tree_write_locks_get(eb); eb->lock_owner = current->pid; } @@ -325,7 +325,7 @@ void btrfs_tree_unlock(struct extent_buffer *eb) btrfs_assert_tree_locked(eb); eb->lock_owner = 0; - atomic_dec(&eb->write_locks); + btrfs_assert_tree_write_locks_put(eb); if (blockers) { btrfs_assert_no_spinning_writers(eb); |