#define fast_wmb() __sync()
#define fast_rmb() __sync()
#define fast_mb() __sync()
+#ifdef CONFIG_SGI_IP28
+#define fast_iob() \
+ __asm__ __volatile__( \
+ ".set push\n\t" \
+ ".set noreorder\n\t" \
+ "lw $0,%0\n\t" \
+ "sync\n\t" \
+ "lw $0,%0\n\t" \
+ ".set pop" \
+ : /* no output */ \
+ : "m" (*(int *)CKSEG1ADDR(0x1fa00004)) \
+ : "memory")
+#else
#define fast_iob() \
do { \
__sync(); \
__fast_iob(); \
} while (0)
+#endif
#ifdef CONFIG_CPU_HAS_WB