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| author | Zhao Lei | 2016-01-06 11:56:36 +0100 |
|---|---|---|
| committer | Chris Mason | 2016-01-20 16:22:13 +0100 |
| commit | 0bc19f9031e0c59770286f82b8561c1d35064a65 (patch) | |
| tree | 2469a01dbf180d1e95d6aebd5f61271dd877ea0a /fs/btrfs/extent-tree.c | |
| parent | btrfs: delete unused argument in btrfs_copy_from_user (diff) | |
| download | kernel-qcow2-linux-0bc19f9031e0c59770286f82b8561c1d35064a65.tar.gz kernel-qcow2-linux-0bc19f9031e0c59770286f82b8561c1d35064a65.tar.xz kernel-qcow2-linux-0bc19f9031e0c59770286f82b8561c1d35064a65.zip | |
btrfs: merge functions for wait snapshot creation
wait_for_snapshot_creation() is in same group with oher two:
btrfs_start_write_no_snapshoting()
btrfs_end_write_no_snapshoting()
Rename wait_for_snapshot_creation() and move it into same place
with other two.
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'fs/btrfs/extent-tree.c')
| -rw-r--r-- | fs/btrfs/extent-tree.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index abcffa4b8231..8e8079808728 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -10817,3 +10817,23 @@ int btrfs_start_write_no_snapshoting(struct btrfs_root *root) } return 1; } + +static int wait_snapshoting_atomic_t(atomic_t *a) +{ + schedule(); + return 0; +} + +void btrfs_wait_for_snapshot_creation(struct btrfs_root *root) +{ + while (true) { + int ret; + + ret = btrfs_start_write_no_snapshoting(root); + if (ret) + break; + wait_on_atomic_t(&root->will_be_snapshoted, + wait_snapshoting_atomic_t, + TASK_UNINTERRUPTIBLE); + } +} |