diff -urN linux-2.6.21.1.old/include/asm-mips/system.h linux-2.6.21.1.dev/include/asm-mips/system.h
--- linux-2.6.21.1.old/include/asm-mips/system.h	2007-04-27 23:49:26.000000000 +0200
+++ linux-2.6.21.1.dev/include/asm-mips/system.h	2007-05-26 19:26:30.870146040 +0200
@@ -188,7 +188,7 @@
    if something tries to do an invalid xchg().  */
 extern void __xchg_called_with_bad_pointer(void);
 
-static inline unsigned long __xchg(unsigned long x, volatile void * ptr, int size)
+static __always_inline unsigned long __xchg(unsigned long x, volatile void * ptr, int size)
 {
 	switch (size) {
 	case 4:
