From: "Darrick J. Wong" <darrick.wong@xxxxxxxxxx> Date: Fri, 2 Jun 2017 11:08:08 -0700 > ext4/jbd2's crc32c implementations will also need a fix like this for > {ext4,jbd2}_chksum. Note that both of these modules call the crypto api > directly to avoid a static dependence on libcrc32c; this was done to > reduce kernel footprint for applications that don't need it. (ext2, > ext3, and ext4 before the metadata_csum feature existed). Good catch. I even looked at that code the other day so should have spotted it as well. I'll integrate fixes for those into my patch when I get a chance, thanks!