linux-kernel - [PATCH 6/8] epoll: delete these duplicate static variables long_zero and long

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Date: Sun, 25 Feb 2024 12:05:36 +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>,
	Jan Kara <jack@...e.cz>,
	"Darrick J. Wong" <djwong@...nel.org>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 6/8] epoll: delete these duplicate static variables long_zero and long_max

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

Since these static variables (long_zero and long_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: Jan Kara <jack@...e.cz>
Cc: "Darrick J. Wong" <djwong@...nel.org>
Cc: linux-kernel@...r.kernel.org
---
 fs/eventpoll.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index 3534d36a1474..22864d6de04f 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -309,9 +309,6 @@ static void unlist_file(struct epitems_head *head)
 
 #include <linux/sysctl.h>
 
-static long long_zero;
-static long long_max = LONG_MAX;
-
 static struct ctl_table epoll_table[] = {
 	{
 		.procname	= "max_user_watches",
@@ -319,8 +316,8 @@ static struct ctl_table epoll_table[] = {
 		.maxlen		= sizeof(max_user_watches),
 		.mode		= 0644,
 		.proc_handler	= proc_doulongvec_minmax,
-		.extra1		= &long_zero,
-		.extra2		= &long_max,
+		.extra1		= SYSCTL_LONG_ZERO,
+		.extra2		= SYSCTL_LONG_MAX,
 	},
 };
 
-- 
2.25.1