tree eccb4e34275854d3f388141e22ffca7470d90513
parent 553c3187f94520772154a98c9854a70253b3c4d9
author Al Viro <viro@zeniv.linux.org.uk> 1541338716 -0500
committer Al Viro <viro@zeniv.linux.org.uk> 1541338716 -0500

fix do_emergency_remount_callback() and do_umount_root()

The former is racy - fetching ->s_root outside of ->s_umount.
The latter actually never propagates errors (ret in inner
scope shadows ret in the outer, so any assignments are lost
by the time we get to return ret;).

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>