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| author | Andreas Dilger | 2019-02-14 23:52:18 +0100 |
|---|---|---|
| committer | Theodore Ts'o | 2019-02-14 23:52:18 +0100 |
| commit | c9e716eb9b3455a83ed7c5f5a81256a3da779a95 (patch) | |
| tree | 77d6ae90a17991f610b74d6a45b5557950c6a1f4 /fs/ext4/super.c | |
| parent | jbd2: fold jbd2_superblock_csum_{verify,set} into their callers (diff) | |
| download | kernel-qcow2-linux-c9e716eb9b3455a83ed7c5f5a81256a3da779a95.tar.gz kernel-qcow2-linux-c9e716eb9b3455a83ed7c5f5a81256a3da779a95.tar.xz kernel-qcow2-linux-c9e716eb9b3455a83ed7c5f5a81256a3da779a95.zip | |
ext4: don't update s_rev_level if not required
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>
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 fb12d3c17c1b..6e4cac646345 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -2249,7 +2249,6 @@ 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); |