Merge branch 'ovl-fixes' into for-linus

Backmerge to resolve a conflict in ovl_lookup_real();
"ovl_lookup_real(): use lookup_one_len_unlocked()" instead,
but it was too late in the cycle to rebase.

diff --cc fs/namei.c
Simple merge

diff --cc fs/open.c
Simple merge

diff --cc fs/overlayfs/super.c
Simple merge

diff --cc fs/proc/base.c
Simple merge

diff --cc include/linux/dcache.h
Simple merge