writecache_error
writecache_error(wc, r, "unable to read metadata: %d", r);
writecache_error(wc, r, "hardware memory error when reading superblock: %d", r);
writecache_error(wc, r, "hardware memory error when reading metadata entry %lu: %d",
writecache_error(wc, -EINVAL,
writecache_error(wc, r, "hardware memory error when reading data: %d", r);
writecache_error(wc, blk_status_to_errno(wb->bio.bi_status),
writecache_error(wc, c->error, "copy error");
writecache_error(endio->wc, -EIO, "error writing metadata");
writecache_error(wc, r, "error writing superblock");
writecache_error(wc, r, "error flushing metadata: %d", r);