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[Xen-changelog] [xen-3.4-testing] PV-on-HVM: Define atomic_cmpxchg() for

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Subject:	[Xen-changelog] [xen-3.4-testing] PV-on-HVM: Define atomic_cmpxchg() for old Linux kernels.
From:	"Xen patchbot-3.4-testing" <patchbot-3.4-testing@xxxxxxxxxxxxxxxxxxx>
Date:	Tue, 02 Jun 2009 22:10:24 -0700
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# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1243863397 -3600
# Node ID f331e54e6655ce44a90e2016b02a6ae9b8e4e635
# Parent  46f9eccaff11f0b210b0e2e62cd728e3d661f7c9
PV-on-HVM: Define atomic_cmpxchg() for old Linux kernels.

Signed-off-by: KUWAMURA Shin'ya <kuwa@xxxxxxxxxxxxxx>
xen-unstable changeset:   19637:97f2e7c576ab
xen-unstable date:        Tue May 26 09:52:59 2009 +0100
---
 unmodified_drivers/linux-2.6/compat-include/xen/platform-compat.h |    4 ++++
 1 files changed, 4 insertions(+)

diff -r 46f9eccaff11 -r f331e54e6655 
unmodified_drivers/linux-2.6/compat-include/xen/platform-compat.h
--- a/unmodified_drivers/linux-2.6/compat-include/xen/platform-compat.h Mon Jun 
01 14:36:09 2009 +0100
+++ b/unmodified_drivers/linux-2.6/compat-include/xen/platform-compat.h Mon Jun 
01 14:36:37 2009 +0100
@@ -157,4 +157,8 @@ typedef irqreturn_t (*irq_handler_t)(int
 #define setup_xen_features xen_setup_features
 #endif
 
+#ifndef atomic_cmpxchg
+#define atomic_cmpxchg(v, old, new) (cmpxchg(&((v)->counter), (old), (new)))
 #endif
+
+#endif

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