On Mon, 22 Aug 2011 13:52:18 -0700
Andrew Morton [off-list ref] wrote:

quoted

+	value64 = value | value << 8 | value << 16 | value << 24;
+	value64 = (value64 & 0xffffffff) | value64 << 32;
+	prefix = 8 - ((unsigned long)start) % 8;
+
+	if (prefix) {
+		u8 *r = check_bytes8(start, value, prefix);
+		if (r)
+			return r;
+		start += prefix;
+		bytes -= prefix;
+	}
+
+	words = bytes / 8;
+
+	while (words) {
+		if (*(u64 *)start != value64)

OK, problem.  This will explode if passed a misaligned address on
certain (non-x86) architectures.

pls ignore.  As Marcin points out, I can't read.