audit: remove dirlen argument to audit_compare_dname_path

All the callers set this to NULL now.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

kernel/audit.h

@@ -79,8 +79,7 @@ extern int audit_comparator(const u32 left, const u32 op, const u32 right);
 extern int audit_uid_comparator(kuid_t left, u32 op, kuid_t right);
 extern int audit_gid_comparator(kgid_t left, u32 op, kgid_t right);
 extern int parent_len(const char *path);
-extern int audit_compare_dname_path(const char *dname, const char *path,
-				    int *dirlen);
+extern int audit_compare_dname_path(const char *dname, const char *path);
 extern struct sk_buff *	    audit_make_reply(int pid, int seq, int type,
 					     int done, int multi,
 					     const void *payload, int size);

kernel/audit_watch.c

@@ -265,7 +265,7 @@ static void audit_update_watch(struct audit_parent *parent,
 	/* Run all of the watches on this parent looking for the one that
 	 * matches the given dname */
 	list_for_each_entry_safe(owatch, nextw, &parent->watches, wlist) {
-		if (audit_compare_dname_path(dname, owatch->path, NULL))
+		if (audit_compare_dname_path(dname, owatch->path))
 			continue;
 
 		/* If the update involves invalidating rules, do the inode-based

kernel/auditfilter.c

@@ -1330,8 +1330,7 @@ int parent_len(const char *path)
 
 /* Compare given dentry name with last component in given path,
  * return of 0 indicates a match. */
-int audit_compare_dname_path(const char *dname, const char *path,
-			     int *dirlen)
+int audit_compare_dname_path(const char *dname, const char *path)
 {
 	int dlen, plen;
 	const char *p;
@@ -1360,9 +1359,6 @@ int audit_compare_dname_path(const char *dname, const char *path,
 			p++;
 	}
 
-	/* return length of path's directory component */
-	if (dirlen)
-		*dirlen = p - path;
 	return strncmp(p, dname, dlen);
 }
 

kernel/auditsc.c

@@ -2222,7 +2222,7 @@ void __audit_inode_child(const struct inode *parent,
 			continue;
 
 		if (n->ino == parent->i_ino &&
-		    !audit_compare_dname_path(dname, n->name, NULL)) {
+		    !audit_compare_dname_path(dname, n->name)) {
 			found_parent = n->name;
 			goto add_names;
 		}
@@ -2235,7 +2235,7 @@ void __audit_inode_child(const struct inode *parent,
 
 		/* strcmp() is the more likely scenario */
 		if (!strcmp(dname, n->name) ||
-		     !audit_compare_dname_path(dname, n->name, NULL)) {
+		     !audit_compare_dname_path(dname, n->name)) {
 			if (inode)
 				audit_copy_inode(n, dentry, inode);
 			else