From a7a2bc1a69ec2b16b984f991817eefcd4f297bc7 Mon Sep 17 00:00:00 2001
From: Hollis Blanchard <hollisb@us.ibm.com>
Date: Thu, 12 Apr 2007 13:05:04 -0500
Subject: [PATCH] [XEN][POWERPC] Fix debug=y build. When debug=y, we use -O0
 for single-stepping. This breaks the force-link-error trick used in __xchg(),
 so we provide a real function to link with. Signed-off-by: Hollis Blanchard
 <hollisb@us.ibm.com>

---
 xen/arch/powerpc/0opt.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/xen/arch/powerpc/0opt.c b/xen/arch/powerpc/0opt.c
index 6d85e63c9e..e029ed11eb 100644
--- a/xen/arch/powerpc/0opt.c
+++ b/xen/arch/powerpc/0opt.c
@@ -21,6 +21,12 @@
 #include <xen/config.h>
 #include <xen/lib.h>
 
+extern void __xchg_called_with_bad_pointer(void);
+void __xchg_called_with_bad_pointer(void)
+{
+    BUG();
+}
+
 extern void __cmpxchg_called_with_bad_pointer(void);
 void __cmpxchg_called_with_bad_pointer(void)
 {
-- 
2.30.2