[PATCH] m68k: cast in strnlen switched to unsigned long

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Cc: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/include/asm-m68k/uaccess.h b/include/asm-m68k/uaccess.h
index a653bf8..2ffd87b 100644
--- a/include/asm-m68k/uaccess.h
+++ b/include/asm-m68k/uaccess.h
@@ -805,7 +805,7 @@
 {
 	long res;
 
-	res = -(long)src;
+	res = -(unsigned long)src;
 	__asm__ __volatile__
 		("1:\n"
 		 "   tstl %2\n"