Merge branch 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszer...

Pull overlayfs updates from Miklos Szeredi:
 "Because copy up can take a long time, serialized copy ups could be a
  big performance bottleneck. This update allows concurrent copy up of
  regular files eliminating this potential problem.

  There are also minor fixes"

* 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs:
  ovl: drop CAP_SYS_RESOURCE from saved mounter's credentials
  ovl: properly implement sync_filesystem()
  ovl: concurrent copy up of regular files
  ovl: introduce copy up waitqueue
  ovl: copy up regular file using O_TMPFILE
  ovl: rearrange code in ovl_copy_up_locked()
  ovl: check if upperdir fs supports O_TMPFILE

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

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

diff --cc fs/overlayfs/util.c
index 9dc1c0af586bad0332cd3550dbeebe3d5b8e441d,01157d6e8cfe055e95371a6f443381ddf1832aa4..1953986ee6bc221f555f4c53f8129f9c865f91e5
--- 1/fs/overlayfs/util.c
--- 2/fs/overlayfs/util.c
+++ b/fs/overlayfs/util.c
@@@ -10,8 -10,7 +10,9 @@@
  #include <linux/fs.h>
  #include <linux/mount.h>
  #include <linux/slab.h>
 +#include <linux/cred.h>
  #include <linux/xattr.h>
++#include <linux/sched/signal.h>
  #include "overlayfs.h"
  #include "ovl_entry.h"