From: Isaku Yamahata <yamahata@valinux.co.jp>
Date: Mon, 16 Jun 2008 21:58:13 +0000 (-0700)
Subject: xen: Use wmb instead of rmb in xen_evtchn_do_upcall().
X-Git-Tag: v2.6.27-rc1~1106^2~251^24~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6673cf63e5d973db5145d1f48b354efcb9fe2a13;p=pandora-kernel.git

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>
---

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