[2/4] btrfs: Refactor locked condition in btrfs_init_new_device
diff mbox series

Message ID 20200722080925.6802-3-nborisov@suse.com
State New
Headers show
Series
  • Misc cleanups around device addition
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Commit Message

Nikolay Borisov July 22, 2020, 8:09 a.m. UTC
Invert unlocked to locked and exploit the fact it can only ever be
modified if we are adding a new device to a seed filesystem. This allows
to simplify the check in error: label. No semantics changes.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
---
 fs/btrfs/volumes.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

Comments

Anand Jain July 30, 2020, 4:31 a.m. UTC | #1
On 22/7/20 4:09 pm, Nikolay Borisov wrote:
> Invert unlocked to locked and exploit the fact it can only ever be
> modified if we are adding a new device to a seed filesystem. This allows
> to simplify the check in error: label. No semantics changes.
> 
> Signed-off-by: Nikolay Borisov <nborisov@suse.com>

Reviewed-by: Anand Jain <anand.jain@oracle.com>

Patch
diff mbox series

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 0795ab511f8b..384614fe0e2a 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -2484,7 +2484,7 @@  int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *device_path
 	u64 orig_super_num_devices;
 	int seeding_dev = 0;
 	int ret = 0;
-	bool unlocked = false;
+	bool locked = false;
 
 	if (sb_rdonly(sb) && !fs_devices->seeding)
 		return -EROFS;
@@ -2498,6 +2498,7 @@  int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *device_path
 		seeding_dev = 1;
 		down_write(&sb->s_umount);
 		mutex_lock(&uuid_mutex);
+		locked = true;
 	}
 
 	filemap_write_and_wait(bdev->bd_inode->i_mapping);
@@ -2629,7 +2630,7 @@  int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *device_path
 	if (seeding_dev) {
 		mutex_unlock(&uuid_mutex);
 		up_write(&sb->s_umount);
-		unlocked = true;
+		locked = false;
 
 		if (ret) /* transaction commit */
 			return ret;
@@ -2690,7 +2691,7 @@  int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *device_path
 	btrfs_free_device(device);
 error:
 	blkdev_put(bdev, FMODE_EXCL);
-	if (seeding_dev && !unlocked) {
+	if (locked) {
 		mutex_unlock(&uuid_mutex);
 		up_write(&sb->s_umount);
 	}