From: Qu Wenruo wqu@suse.com
commit d5321a0fa8bc49f11bea0b470800962c17d92d8f upstream.
The following error message lack the "0x" obviously:
cannot mount because of unsupported optional features (4000)
Add the prefix to make it less confusing. This can happen on older kernels that try to mount a filesystem with newer features so it makes sense to backport to older trees.
CC: stable@vger.kernel.org # 4.14+ Reviewed-by: Nikolay Borisov nborisov@suse.com Signed-off-by: Qu Wenruo wqu@suse.com Reviewed-by: David Sterba dsterba@suse.com Signed-off-by: David Sterba dsterba@suse.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/btrfs/disk-io.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -2855,7 +2855,7 @@ int open_ctree(struct super_block *sb, ~BTRFS_FEATURE_INCOMPAT_SUPP; if (features) { btrfs_err(fs_info, - "cannot mount because of unsupported optional features (%llx)", + "cannot mount because of unsupported optional features (0x%llx)", features); err = -EINVAL; goto fail_alloc; @@ -2915,7 +2915,7 @@ int open_ctree(struct super_block *sb, ~BTRFS_FEATURE_COMPAT_RO_SUPP; if (!sb_rdonly(sb) && features) { btrfs_err(fs_info, - "cannot mount read-write because of unsupported optional features (%llx)", + "cannot mount read-write because of unsupported optional features (0x%llx)", features); err = -EINVAL; goto fail_alloc;