Apparently we didn't update the mmap control page right after mmap(),
which leads to surprises when userspace wants to use it.
Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Cc: Arun Sharma <asharma@fb.com>
Link: http://lkml.kernel.org/n/tip-dcpi7164djsexmx6ya7lilrc@git.kernel.orgSigned-off-by: NIngo Molnar <mingo@elte.hu>