FYI, we noticed the below changes on

https://github.com/0day-ci/linux Chao-Yu/f2fs-clean-up-node-page-updating-flow/20151211-161235
commit 9f88450ff18d8bd577ff431318f7ae00034465c0 ("f2fs: do more integrity verification for superblock")


After your commit, our mounting f2fs partition operations will fail with
following error message.  But I have no dmesg now.  Do you need it?

mount: wrong fs type, bad option, bad superblock on /dev/sda3,
       missing codepage or helper program, or other error

       In some cases useful info is found in syslog - try
       dmesg | tail or so.


To reproduce:

        git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
        cd lkp-tests
        bin/lkp install job.yaml  # job file is attached in this email
        bin/lkp run     job.yaml



Thanks,
Ying Huang