[Xen-changelog] [linux-2.6.18-xen] evtchn: Use wmb instead of rmb to enforce ordering between

["Xen patchbot-linux-2.6.18-xen" <patchbot-linux-2.6.18-xen@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1210244142 -3600
# Node ID 77db69c382497116ca3835cd51824723d20b5fb9
# Parent  63b51bcb6bf6cdc746cd2662f6c8e6a1ebae078d
evtchn: Use wmb instead of rmb to enforce ordering between
evtchn_upcall_pending and evtchn_pending_sel stores.

Signed-off-by: Samuel Thibault <samuel.thibault@xxxxxxxxxxxxx>
---
 drivers/xen/core/evtchn.c |    2 +-
 1 files changed, 1 insertion(+), 1 deletion(-)

diff -r 63b51bcb6bf6 -r 77db69c38249 drivers/xen/core/evtchn.c
--- a/drivers/xen/core/evtchn.c Thu May 08 11:14:47 2008 +0100
+++ b/drivers/xen/core/evtchn.c Thu May 08 11:55:42 2008 +0100
@@ -246,7 +246,7 @@ asmlinkage void evtchn_do_upcall(struct 
 
 #ifndef CONFIG_X86 /* No need for a barrier -- XCHG is a barrier on x86. */
                /* Clear master flag /before/ clearing selector flag. */
-               rmb();
+               wmb();
 #endif
                l1 = xchg(&vcpu_info->evtchn_pending_sel, 0);
 

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