There is only pass NULL 'bh' in ext4_multi_mount_protect, So just call sb_getblk get buffer head fisrt, and we will simplify read_mmp_block function. Signed-off-by: Ye Bin <yebin10@xxxxxxxxxx> --- fs/ext4/mmp.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/fs/ext4/mmp.c b/fs/ext4/mmp.c index 4af8b99ade84..6ac6aacd8fa5 100644 --- a/fs/ext4/mmp.c +++ b/fs/ext4/mmp.c @@ -295,6 +295,10 @@ int ext4_multi_mount_protect(struct super_block *sb, goto failed; } + bh = sb_getblk(sb, mmp_block); + if (bh) + goto failed; + retval = read_mmp_block(sb, &bh, mmp_block); if (retval) goto failed; -- 2.31.1
