diff options
| -rw-r--r-- | fs/btrfs/file.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index 37bf473f2132..c2e83babdb8d 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -962,6 +962,7 @@ lock_and_cleanup_extent_if_need(struct btrfs_inode *inode, struct folio *folio, * @pos: File offset. * @write_bytes: The length to write, will be updated to the nocow writeable * range. + * @nowait: Indicate if we can block or not (non-blocking IO context). * * This function will flush ordered extents in the range to ensure proper * nocow checks. @@ -970,7 +971,8 @@ lock_and_cleanup_extent_if_need(struct btrfs_inode *inode, struct folio *folio, * > 0 If we can nocow, and updates @write_bytes. * 0 If we can't do a nocow write. * -EAGAIN If we can't do a nocow write because snapshoting of the inode's - * root is in progress. + * root is in progress or because we are in a non-blocking IO + * context and need to block (@nowait is true). * < 0 If an error happened. * * NOTE: Callers need to call btrfs_check_nocow_unlock() if we return > 0. |