lib/string.c: simplify stricmp()

Removes 32 bytes on core2 with gcc 4.4.1:
   text    data     bss     dec     hex filename
   3196       0       0    3196     c7c lib/string-BEFORE.o
   3164       0       0    3164     c5c lib/string-AFTER.o

Signed-off-by: André Goddard Rosa <andre.goddard@gmail.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>

1 files changed, 15 insertions, 19 deletions

diff --git a/lib/string.c b/lib/string.c
index a1cdcfcc42d0..0f8624532082 100644
--- a/lib/string.c
+++ b/lib/string.c
@@ -36,25 +36,21 @@ int strnicmp(const char *s1, const char *s2, size_t len)
         /* Yes, Virginia, it had better be unsigned */
         unsigned char c1, c2;
 
-        c1 = c2 = 0;
-        if (len) {
-                do {
-                        c1 = *s1;
-                        c2 = *s2;
-                        s1++;
-                        s2++;
-                        if (!c1)
-                                break;
-                        if (!c2)
-                                break;
-                        if (c1 == c2)
-                                continue;
-                        c1 = tolower(c1);
-                        c2 = tolower(c2);
-                        if (c1 != c2)
-                                break;
-                } while (--len);
-        }
+        if (!len)
+                return 0;
+
+        do {
+                c1 = *s1++;
+                c2 = *s2++;
+                if (!c1 || !c2)
+                        break;
+                if (c1 == c2)
+                        continue;
+                c1 = tolower(c1);
+                c2 = tolower(c2);
+                if (c1 != c2)
+                        break;
+        } while (--len);
         return (int)c1 - (int)c2;
 }
 EXPORT_SYMBOL(strnicmp);