diff options
Diffstat (limited to 'fs/btrfs/ioctl.c')
| -rw-r--r-- | fs/btrfs/ioctl.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 3abc068c5543..b590e23fa03e 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -617,7 +617,7 @@ fail: return ret; } -static void btrfs_wait_nocow_write(struct btrfs_root *root) +static void btrfs_wait_for_no_snapshoting_writes(struct btrfs_root *root) { s64 writers; DEFINE_WAIT(wait); @@ -649,7 +649,7 @@ static int create_snapshot(struct btrfs_root *root, struct inode *dir, atomic_inc(&root->will_be_snapshoted); smp_mb__after_atomic(); - btrfs_wait_nocow_write(root); + btrfs_wait_for_no_snapshoting_writes(root); ret = btrfs_start_delalloc_inodes(root, 0); if (ret) @@ -732,7 +732,8 @@ fail: free: kfree(pending_snapshot); out: - atomic_dec(&root->will_be_snapshoted); + if (atomic_dec_and_test(&root->will_be_snapshoted)) + wake_up_atomic_t(&root->will_be_snapshoted); return ret; } |