mm/secretmem: remove reduntant return value

The return value @ret is always 0, so remove it and return 0 directly.

Link: https://lkml.kernel.org/r/20220920012205.246217-1-xiujianfeng@huawei.comSigned-off-by: Xiu Jianfeng <xiujianfeng@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

mm/secretmem.c

@@ -278,10 +278,8 @@ static struct file_system_type secretmem_fs = {
 
 static int __init secretmem_init(void)
 {
-	int ret = 0;
-
 	if (!secretmem_enable)
-		return ret;
+		return 0;
 
 	secretmem_mnt = kern_mount(&secretmem_fs);
 	if (IS_ERR(secretmem_mnt))
@@ -290,6 +288,6 @@ static int __init secretmem_init(void)
 	/* prevent secretmem mappings from ever getting PROT_EXEC */
 	secretmem_mnt->mnt_flags |= MNT_NOEXEC;
 
-	return ret;
+	return 0;
 }
 fs_initcall(secretmem_init);