[PATCHv4 3/3] xenfs: Use proc_create_mount_point() to create /proc/xen

From: Seth Forshee Mounting proc in user namespace containers fails if the xenbus filesystem is mounted on /proc/xen because this directory fails the "permanently empty" test. proc_create_mount_point() exists specifically to create such mountpoints in proc but is

[PATCHv4 3/3] xenfs: Use proc_create_mount_point() to create /proc/xen

From: Seth Forshee Mounting proc in user namespace containers fails if the xenbus filesystem is mounted on /proc/xen because this directory fails the "permanently empty" test. proc_create_mount_point() exists specifically to create such mountpoints in proc but is currently proc-internal. Export