prefetchw(x) - prefetches the cacheline at "x" for write
spin_lock_prefetch(x) - prefetches the spinlock *x for taking
- there is also PREFETCH_STRIDE which is the architecure-prefered
+ there is also PREFETCH_STRIDE which is the architecure-preferred
"lookahead" size for prefetching streamed operations.
*/
-/*
- * These cannot be do{}while(0) macros. See the mental gymnastics in
- * the loop macro.
- */
-
#ifndef ARCH_HAS_PREFETCH
-static inline void prefetch(const void *x) {;}
+#define prefetch(x) __builtin_prefetch(x)
#endif
#ifndef ARCH_HAS_PREFETCHW
-static inline void prefetchw(const void *x) {;}
+#define prefetchw(x) __builtin_prefetch(x,1)
#endif
#ifndef ARCH_HAS_SPINLOCK_PREFETCH