lib/string.c: simplify strnstr()

Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Cc: Joe Perches <joe@perches.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/lib/string.c b/lib/string.c
index 0f86245..f71bead 100644 (file)
--- a/lib/string.c
+++ b/lib/string.c
@@ -689,13 +689,13 @@ EXPORT_SYMBOL(strstr);
  */
 char *strnstr(const char *s1, const char *s2, size_t len)
 {
-       size_t l1 = len, l2;
+       size_t l2;
 
        l2 = strlen(s2);
        if (!l2)
                return (char *)s1;
-       while (l1 >= l2) {
-               l1--;
+       while (len >= l2) {
+               len--;
                if (!memcmp(s1, s2, l2))
                        return (char *)s1;
                s1++;