-#define cmm_mb() asm volatile("mb":::"memory")
-#define cmm_wmb() asm volatile("wmb":::"memory")
-#define cmm_read_barrier_depends() asm volatile("mb":::"memory")
+#define cmm_mb() __asm__ __volatile__ ("mb":::"memory")
+#define cmm_wmb() __asm__ __volatile__ ("wmb":::"memory")
+#define cmm_read_barrier_depends() __asm__ __volatile__ ("mb":::"memory")