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btrfs: switch extent_buffer::lock_nested to bool

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The member is tracking simple status of the lock, we can use bool for
that and make some room for further space reduction in the structure.

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba
2018-08-24 16:31:17 +02:00
parent c79adfc085
commit ed1b4ed79d
3 changed files with 5 additions and 5 deletions
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2
fs/btrfs/extent_io.c
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@@ -4679,7 +4679,7 @@ __alloc_extent_buffer(struct btrfs_fs_info *fs_info, u64 start,
rwlock_init(&eb->lock);
atomic_set(&eb->blocking_readers, 0);
atomic_set(&eb->blocking_writers, 0);
eb->lock_nested = 0;
eb->lock_nested = false;
init_waitqueue_head(&eb->write_lock_wq);
init_waitqueue_head(&eb->read_lock_wq);