diff options
| author | Andreas Dilger <adilger@dilger.ca> | 2019-02-14 17:52:18 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-05-22 07:37:46 +0200 |
| commit | e8816d3bc5956a3d4d0f00651138a8a3b36a07bf (patch) | |
| tree | 09378abfc114e6fcb38586dbe7557b24f0eade28 /fs/ext4/super.c | |
| parent | 6172ae55a187378b091282c7a5b4895635e63371 (diff) | |
ext4: don't update s_rev_level if not required
commit c9e716eb9b3455a83ed7c5f5a81256a3da779a95 upstream.
Don't update the superblock s_rev_level during mount if it isn't
actually necessary, only if superblock features are being set by
the kernel. This was originally added for ext3 since it always
set the INCOMPAT_RECOVER and HAS_JOURNAL features during mount,
but this is not needed since no journal mode was added to ext4.
That will allow Geert to mount his 20-year-old ext2 rev 0.0 m68k
filesystem, as a testament of the backward compatibility of ext4.
Fixes: 0390131ba84f ("ext4: Allow ext4 to run without a journal")
Signed-off-by: Andreas Dilger <adilger@dilger.ca>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/ext4/super.c')
| -rw-r--r-- | fs/ext4/super.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 07d73fb22b60..a270391228af 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -2259,7 +2259,6 @@ static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); le16_add_cpu(&es->s_mnt_count, 1); ext4_update_tstamp(es, s_mtime); - ext4_update_dynamic_rev(sb); if (sbi->s_journal) ext4_set_feature_journal_needs_recovery(sb); |