--- a/arch/mips/include/asm/system.h
+++ b/arch/mips/include/asm/system.h
@@ -194,7 +194,7 @@ extern __u64 __xchg_u64_unsupported_on_3
 #define __xchg_u64 __xchg_u64_unsupported_on_32bit_kernels
 #endif
 
-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: