Description of problem: mount API prereqs. Mostly that's LSM mount options cleanups. One trivial conflict in security/selinux/hooks.c, resolved by taking the variant from this branch - the method has been split, leaving only the part that used to be conditional upon "it's not an internal mount" and check has been moved into the caller of the remaining piece. The last commit in this pile ("mount_fs: suppress MAC on MS_SUBMOUNT as well as MS_KERNMOUNT") is an equivalent of the conflict-creating mainline change. There are several minor fixes in there, but nothing earth-shattering (leaks on failure exits, mostly).
The PR Link: https://gitee.com/anolis/cloud-kernel/pulls/1902