[Xen-changelog] [xen-unstable] PV-on-HVM: Define atomic_cmpxchg() for old Linux kernels.

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1243327979 -3600
# Node ID 97f2e7c576ab506e894a20ce3b7cfda31afe49a0
# Parent  0f752c773497b8e5ee4a774249bd2db4477416d0
PV-on-HVM: Define atomic_cmpxchg() for old Linux kernels.

Signed-off-by: KUWAMURA Shin'ya <kuwa@xxxxxxxxxxxxxx>
---
 unmodified_drivers/linux-2.6/compat-include/xen/platform-compat.h |    4 ++++
 1 files changed, 4 insertions(+)

diff -r 0f752c773497 -r 97f2e7c576ab 
unmodified_drivers/linux-2.6/compat-include/xen/platform-compat.h
--- a/unmodified_drivers/linux-2.6/compat-include/xen/platform-compat.h Tue May 
26 09:50:35 2009 +0100
+++ b/unmodified_drivers/linux-2.6/compat-include/xen/platform-compat.h Tue May 
26 09:52:59 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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