tree 3d41133619858b27d3c34e09d787a6120b3646cb
parent 54481cf88bc59923ea30f2ca345a73c60155e901
author Isaku Yamahata <yamahata@valinux.co.jp> 1213653493 -0700
committer Ingo Molnar <mingo@elte.hu> 1213966590 +0200

xen: Use wmb instead of rmb in xen_evtchn_do_upcall().

This patch is ported one from 534:77db69c38249 of linux-2.6.18-xen.hg.
Use wmb instead of rmb to enforce ordering between
evtchn_upcall_pending and evtchn_pending_sel stores
in xen_evtchn_do_upcall().

Cc: Samuel Thibault <samuel.thibault@eu.citrix.com>
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: the arch/x86 maintainers <x86@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>