X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=lib%2Fstring.c;h=e5878de4f1013ddbdd3db07d1fca2bcc3a692a7c;hb=623e3db9f9b7d6e7b2a99180f9cf0825c936ab7a;hp=0573a20df9a6d85c7d559c608ea42df8140163a8;hpb=50af5ead3b44ccf8bd2b4d2a50c1b610f557c480;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git

diff --git a/lib/string.c b/lib/string.c
index 0573a20..e5878de 100644
--- a/lib/string.c
+++ b/lib/string.c
@@ -22,8 +22,10 @@
 #include <linux/types.h>
 #include <linux/string.h>
 #include <linux/ctype.h>
+#include <linux/kernel.h>
+#include <linux/export.h>
 #include <linux/bug.h>
-#include <linux/module.h>
+#include <linux/errno.h>
 
 #ifndef __HAVE_ARCH_STRNICMP
 /**
@@ -786,12 +788,24 @@ void *memchr_inv(const void *start, int c, size_t bytes)
 	if (bytes <= 16)
 		return check_bytes8(start, value, bytes);
 
-	value64 = value | value << 8 | value << 16 | value << 24;
-	value64 = (value64 & 0xffffffff) | value64 << 32;
-	prefix = 8 - ((unsigned long)start) % 8;
+	value64 = value;
+#if defined(ARCH_HAS_FAST_MULTIPLIER) && BITS_PER_LONG == 64
+	value64 *= 0x0101010101010101;
+#elif defined(ARCH_HAS_FAST_MULTIPLIER)
+	value64 *= 0x01010101;
+	value64 |= value64 << 32;
+#else
+	value64 |= value64 << 8;
+	value64 |= value64 << 16;
+	value64 |= value64 << 32;
+#endif
 
+	prefix = (unsigned long)start % 8;
 	if (prefix) {
-		u8 *r = check_bytes8(start, value, prefix);
+		u8 *r;
+
+		prefix = 8 - prefix;
+		r = check_bytes8(start, value, prefix);
 		if (r)
 			return r;
 		start += prefix;