diff options
| -rw-r--r-- | fs/btrfs/extent_io.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index cf3f576d6277..a268cc6923e0 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -3652,11 +3652,14 @@ static void end_extent_buffer_writeback(struct extent_buffer *eb) } /* - * Lock eb pages and flush the bio if we can't the locks + * Lock extent buffer status and pages for writeback. * - * Return 0 if nothing went wrong - * Return >0 is same as 0, except bio is not submitted - * Return <0 if something went wrong, no page is locked + * May try to flush write bio if we can't get the lock. + * + * Return 0 if the extent buffer doesn't need to be submitted. + * (E.g. the extent buffer is not dirty) + * Return >0 is the extent buffer is submitted to bio. + * Return <0 if something went wrong, no page is locked. */ static noinline_for_stack int lock_extent_buffer_for_io(struct extent_buffer *eb, struct extent_page_data *epd) |