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btrfs: dev-replace: remove unused members of btrfs_dev_replace 

Lock owner and nesting level have been unused since day 1, probably
copy&pasted from the extent_buffer locking scheme without much thinking.
The locking of device replace is simpler and does not need any lock
nesting.

Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2018-07-20 16:30:20 +02:00
parent e17385ca29
commit e9539cff04
2 changed files with 0 additions and 4 deletions
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2
fs/btrfs/ctree.h
View File

@ -365,8 +365,6 @@ struct btrfs_dev_replace {
struct btrfs_device *srcdev;
struct btrfs_device *tgtdev;
pid_t lock_owner;
atomic_t nesting_level;
struct mutex lock_finishing_cancel_unmount;
rwlock_t lock;
atomic_t read_locks;

2
fs/btrfs/disk-io.c
View File

@ -2154,8 +2154,6 @@ static void btrfs_init_btree_inode(struct btrfs_fs_info *fs_info)
static void btrfs_init_dev_replace_locks(struct btrfs_fs_info *fs_info)
{
fs_info->dev_replace.lock_owner = 0;
atomic_set(&fs_info->dev_replace.nesting_level, 0);
mutex_init(&fs_info->dev_replace.lock_finishing_cancel_unmount);
rwlock_init(&fs_info->dev_replace.lock);
atomic_set(&fs_info->dev_replace.read_locks, 0);