linux-kernel - [PATCH 8/8] ucounts: delete these duplicate static variables ue_zero and ue_int

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Date: Sun, 25 Feb 2024 12:05:38 +0800
From: wenyang.linux@...mail.com
To: Luis Chamberlain <mcgrof@...nel.org>,
	Kees Cook <keescook@...omium.org>,
	Joel Granados <j.granados@...sung.com>,
	Christian Brauner <brauner@...nel.org>,
	davem@...emloft.net,
	David Ahern <dsahern@...nel.org>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>
Cc: Wen Yang <wenyang.linux@...mail.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Shuah Khan <skhan@...uxfoundation.org>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 8/8] ucounts: delete these duplicate static variables ue_zero and ue_int_max

From: Wen Yang <wenyang.linux@...mail.com>

Since these static variables (ue_zero and ue_int_max) are only used for
boundary checks and will not be changed, remove it and use the ones in
our shared const array.

Signed-off-by: Wen Yang <wenyang.linux@...mail.com>
Cc: Luis Chamberlain <mcgrof@...nel.org>
Cc: Kees Cook <keescook@...omium.org>
Cc: Joel Granados <j.granados@...sung.com>
Cc: Christian Brauner <brauner@...nel.org>
Cc: "Eric W. Biederman" <ebiederm@...ssion.com>
Cc: Shuah Khan <skhan@...uxfoundation.org>
Cc: linux-kernel@...r.kernel.org
---
 kernel/ucount.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/kernel/ucount.c b/kernel/ucount.c
index 4aa6166cb856..05bbba02ae4f 100644
--- a/kernel/ucount.c
+++ b/kernel/ucount.c
@@ -58,17 +58,14 @@ static struct ctl_table_root set_root = {
 	.permissions = set_permissions,
 };
 
-static long ue_zero = 0;
-static long ue_int_max = INT_MAX;
-
 #define UCOUNT_ENTRY(name)					\
 	{							\
 		.procname	= name,				\
 		.maxlen		= sizeof(long),			\
 		.mode		= 0644,				\
 		.proc_handler	= proc_doulongvec_minmax,	\
-		.extra1		= &ue_zero,			\
-		.extra2		= &ue_int_max,			\
+		.extra1		= SYSCTL_LONG_ZERO,		\
+		.extra2		= SYSCTL_LONG_S32_MAX,		\
 	}
 static struct ctl_table user_table[] = {
 	UCOUNT_ENTRY("max_user_namespaces"),
-- 
2.25.1