This fixes the api for __xchg function in system.h so that PPC Xen can
build correctly in Xen unstable. This is the same API used in the __xchg
on x86. 

Signed-off-by: Jerone Young <[EMAIL PROTECTED]>

diff -r 7e431ea834a8 xen/include/asm-powerpc/system.h
--- a/xen/include/asm-powerpc/system.h  Tue Apr 03 13:22:37 2007 +0100
+++ b/xen/include/asm-powerpc/system.h  Wed Jan 29 05:37:30 2031 -0600
@@ -73,7 +73,7 @@ extern void __xchg_called_with_bad_point
 extern void __xchg_called_with_bad_pointer(void);

 static __inline__ unsigned long
-__xchg(volatile void *ptr, unsigned long x, int size)
+__xchg(unsigned long x, volatile void *ptr, int size)
     switch (size) {
     case 4:

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