xenfs: Use proc_create_mount_point() to create /proc/xen
authorSeth Forshee <seth.forshee@canonical.com>
Mon, 14 Nov 2016 11:12:56 +0000 (11:12 +0000)
committerJuergen Gross <jgross@suse.com>
Thu, 17 Nov 2016 12:52:18 +0000 (13:52 +0100)
commitf97df70b1c879f764f88b25b0e67b03a5213968a
tree3358865fd56dcac3907492c156cb98cc79f788fc
parent1ea55e8078a4fede5c21ea195d4e96091240a6ad
xenfs: Use proc_create_mount_point() to create /proc/xen

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 this interface to modules, then use it in
xenbus when creating /proc/xen.

Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
drivers/xen/xenbus/xenbus_probe.c
fs/proc/generic.c
fs/proc/internal.h
include/linux/proc_fs.h