TOMOYO: Cleanup part 4.

Gather string constants to one file in order to make the object size smaller.
Use unsigned type where appropriate.
read()/write() returns ssize_t.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: James Morris <jmorris@namei.org>
diff --git a/security/tomoyo/audit.c b/security/tomoyo/audit.c
index ef2172f..45e0a9f 100644
--- a/security/tomoyo/audit.c
+++ b/security/tomoyo/audit.c
@@ -163,7 +163,8 @@
 			     const bool is_granted)
 {
 	u8 mode;
-	const u8 category = TOMOYO_MAC_CATEGORY_FILE + TOMOYO_MAX_MAC_INDEX;
+	const u8 category = tomoyo_index2category[index] +
+		TOMOYO_MAX_MAC_INDEX;
 	struct tomoyo_profile *p;
 	if (!tomoyo_policy_loaded)
 		return false;