/* Nop everywhere except on alpha. */
#define smp_read_barrier_depends()
-/* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */
-static inline void rep_nop(void)
-{
- asm volatile("rep; nop" ::: "memory");
-}
-
static inline void cpu_relax(void)
{
rep_nop();