ext4: remove redundant sb checksum recomputation

Superblock is written out either through ext4_commit_super() or through
ext4_handle_dirty_super(). In both cases we recompute the checksum so it
is not necessary to recompute it after updating superblock free inodes &
blocks counters.

Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Link: https://lore.kernel.org/r/20201127113405.26867-3-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 3ef84e8..7bb516c 100644 (file)
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -5010,13 +5010,11 @@ no_journal:
        block = ext4_count_free_clusters(sb);
        ext4_free_blocks_count_set(sbi->s_es, 
                                   EXT4_C2B(sbi, block));
-       ext4_superblock_csum_set(sb);
        err = percpu_counter_init(&sbi->s_freeclusters_counter, block,
                                  GFP_KERNEL);
        if (!err) {
                unsigned long freei = ext4_count_free_inodes(sb);
                sbi->s_es->s_free_inodes_count = cpu_to_le32(freei);
-               ext4_superblock_csum_set(sb);
                err = percpu_counter_init(&sbi->s_freeinodes_counter, freei,
                                          GFP_KERNEL);
        }