From 90299ad0bbd08ede502c5adbbc521e6da4e06f50 Mon Sep 17 00:00:00 2001
From: Coconut <85353552+Coconutat@users.noreply.github.com>
Date: Tue, 20 Jun 2023 10:35:07 +0800
Subject: [PATCH] kernel:Fix the issue of incompatible __maybe_unused in the
 GCC compiler kernel used in versions 4.4. x to 4.9. x. (#660)

---
 kernel/ksud.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/kernel/ksud.c b/kernel/ksud.c
index bb4c038c..8ef4f445 100644
--- a/kernel/ksud.c
+++ b/kernel/ksud.c
@@ -108,7 +108,13 @@ static const char __user *get_user_arg_ptr(struct user_arg_ptr argv, int nr)
 /*
  * count() counts the number of strings in array ARGV.
  */
-static int count(struct user_arg_ptr argv, int max) __maybe_unused
+
+ /*
+ * Make sure old GCC compiler can use __maybe_unused,
+ * Test passed in 4.4.x ~ 4.9.x when use GCC.
+ */
+
+static int __maybe_unused count(struct user_arg_ptr argv, int max)
 {
 	int i = 0;