btrfs: add dummy callback for readpage_io_failed and drop checks

Make extent_io_ops::readpage_io_failed_hook callback mandatory and
define a dummy function for btrfs_extent_io_ops. As the failed IO
callback is not performance critical, the branch vs extra trade off does
not hurt.

Signed-off-by: David Sterba <dsterba@suse.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 0786985a8cc5..28e81922a21c 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -2581,7 +2581,7 @@ static void end_bio_extent_readpage(struct bio *bio)
                 if (likely(uptodate))
                         goto readpage_ok;
 
-                if (tree->ops && tree->ops->readpage_io_failed_hook) {
+                if (tree->ops) {
                         ret = tree->ops->readpage_io_failed_hook(page, mirror);
                         if (!ret && !bio->bi_error)
                                 uptodate = 1;