Initial commit from HTC m7ul-3.4.10-jb-crc-ddcfb8c
diff --git a/include/linux/prefetch.h b/include/linux/prefetch.h
new file mode 100644
index 0000000..e3ec518
--- /dev/null
+++ b/include/linux/prefetch.h
@@ -0,0 +1,37 @@
+
+#ifndef _LINUX_PREFETCH_H
+#define _LINUX_PREFETCH_H
+
+#include <linux/types.h>
+#include <asm/processor.h>
+#include <asm/cache.h>
+
+
+#ifndef ARCH_HAS_PREFETCH
+#define prefetch(x) __builtin_prefetch(x)
+#endif
+
+#ifndef ARCH_HAS_PREFETCHW
+#define prefetchw(x) __builtin_prefetch(x,1)
+#endif
+
+#ifndef ARCH_HAS_SPINLOCK_PREFETCH
+#define spin_lock_prefetch(x) prefetchw(x)
+#endif
+
+#ifndef PREFETCH_STRIDE
+#define PREFETCH_STRIDE (4*L1_CACHE_BYTES)
+#endif
+
+static inline void prefetch_range(void *addr, size_t len)
+{
+#ifdef ARCH_HAS_PREFETCH
+ char *cp;
+ char *end = addr + len;
+
+ for (cp = addr; cp < end; cp += PREFETCH_STRIDE)
+ prefetch(cp);
+#endif
+}
+
+#endif