lsm: rename exists_ordered_lsm() to lsm_order_exists()

Also add a header comment block to the function.

Reviewed-by: Casey Schaufler <casey@schaufler-ca.com>
Reviewed-by: John Johansen <john.johhansen@canonical.com>
Reviewed-by: Mimi Zohar <zohar@linux.ibm.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>

Author: pcmoore

security/lsm_init.c

@@ -108,8 +108,11 @@ static inline bool lsm_is_enabled(struct lsm_info *lsm)
 	return (lsm->enabled ? *lsm->enabled : false);
 }
 
-/* Is an LSM already listed in the ordered LSMs list? */
-static bool __init exists_ordered_lsm(struct lsm_info *lsm)
+/**
+ * lsm_order_exists - Determine if a LSM exists in the ordered list
+ * @lsm: LSM definition
+ */
+static bool __init lsm_order_exists(struct lsm_info *lsm)
 {
 	struct lsm_info **check;
 
@@ -126,7 +129,7 @@ static int last_lsm __initdata;
 static void __init append_ordered_lsm(struct lsm_info *lsm, const char *from)
 {
 	/* Ignore duplicate selections. */
-	if (exists_ordered_lsm(lsm))
+	if (lsm_order_exists(lsm))
 		return;
 
 	if (WARN(last_lsm == MAX_LSM_COUNT, "%s: out of LSM static calls!?\n", from))
@@ -269,7 +272,7 @@ static void __init ordered_lsm_parse(const char *order, const char *origin)
 	/* Process "security=", if given. */
 	if (lsm_order_legacy) {
 		lsm_for_each_raw(lsm) {
-			if (exists_ordered_lsm(lsm))
+			if (lsm_order_exists(lsm))
 				continue;
 			if (strcmp(lsm->id->name, lsm_order_legacy) == 0)
 				append_ordered_lsm(lsm, "security=");
@@ -284,7 +287,7 @@ static void __init ordered_lsm_parse(const char *order, const char *origin)
 
 	/* Disable all LSMs not in the ordered list. */
 	lsm_for_each_raw(lsm) {
-		if (exists_ordered_lsm(lsm))
+		if (lsm_order_exists(lsm))
 			continue;
 		lsm_enabled_set(lsm, false);
 		init_debug("%s skipped: %s (not in requested order)\n",