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| author | Jeff Layton <jlayton@redhat.com> | 2017-05-25 13:39:52 +0300 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2017-06-19 19:26:01 +0300 |
| commit | 3189ff778630d9ce8a9f2fda9f8ae4510cceb154 (patch) | |
| tree | 3a54d9e4db65217606a47189b0c11ced8094e8d1 /fs/btrfs/disk-io.h | |
| parent | 118c701e20ad6edfb35fd83ec6989991714b1d89 (diff) | |
| download | linux-3189ff778630d9ce8a9f2fda9f8ae4510cceb154.tar.xz | |
btrfs: btrfs_wait_tree_block_writeback can be void return
Nothing checks its return value.
Is it safe to skip checking return value of btrfs_wait_tree_block_writeback?
Liu Bo: I think yes, it's used in walk_log_tree which is called in two
places, free_log_tree and log replay. For free_log_tree, it waits for
any running writeback of the extent buffer under freeing to finish in
case we need to access the eb pointer from page->private, and it's OK to
not check the return value, while for log replay, it's doesn't wait
because wc->wait is not set. So neither cares about the writeback error.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
[ added more explanation to changelog, from Liu Bo ]
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/disk-io.h')
| -rw-r--r-- | fs/btrfs/disk-io.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/btrfs/disk-io.h b/fs/btrfs/disk-io.h index 35ddfcf04ad0..4654d129aa76 100644 --- a/fs/btrfs/disk-io.h +++ b/fs/btrfs/disk-io.h @@ -127,7 +127,7 @@ int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct bio *bio, extent_submit_bio_hook_t *submit_bio_done); unsigned long btrfs_async_submit_limit(struct btrfs_fs_info *info); int btrfs_write_tree_block(struct extent_buffer *buf); -int btrfs_wait_tree_block_writeback(struct extent_buffer *buf); +void btrfs_wait_tree_block_writeback(struct extent_buffer *buf); int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans, struct btrfs_fs_info *fs_info); int btrfs_add_log_tree(struct btrfs_trans_handle *trans, |