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btrfs: add dummy callback for readpage_io_failed and drop checks

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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>
This commit is contained in:
David Sterba
2017-02-17 16:24:29 +01:00
parent 20c9801d39
commit 20a7db8ab3
4 changed files with 10 additions and 3 deletions
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7
fs/btrfs/inode.c
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@@ -10509,6 +10509,12 @@ out_inode:
}
__attribute__((const))
static int dummy_readpage_io_failed_hook(struct page *page, int failed_mirror)
{
return 0;
}
static const struct inode_operations btrfs_dir_inode_operations = {
.getattr = btrfs_getattr,
.lookup = btrfs_lookup,
@@ -10551,6 +10557,7 @@ static const struct extent_io_ops btrfs_extent_io_ops = {
.submit_bio_hook = btrfs_submit_bio_hook,
.readpage_end_io_hook = btrfs_readpage_end_io_hook,
.merge_bio_hook = btrfs_merge_bio_hook,
.readpage_io_failed_hook = dummy_readpage_io_failed_hook,
/* optional callbacks */
.fill_delalloc = run_delalloc_range,