--- a/arch/mips/include/asm/system.h
+++ b/arch/mips/include/asm/system.h
@@ -187,7 +187,7 @@ extern __u64 __xchg_u64_unsupported_on_3
    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: