linux-kernel - [PATCH v2 8/9] fs: inotify: delete these unnecessary static variables it_zero and it_int

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Date: Sat,  9 Mar 2024 18:31:25 +0800
From: wenyang.linux@...mail.com
To: "Eric W . Biederman" <ebiederm@...ssion.com>,
	Luis Chamberlain <mcgrof@...nel.org>,
	Kees Cook <keescook@...omium.org>,
	Joel Granados <j.granados@...sung.com>,
	Christian Brauner <brauner@...nel.org>
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 v2 8/9] fs: inotify: delete these unnecessary static variables it_zero and it_int_max

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

Delete unnecessary static variables (it_zero and it_int_max)
and encode them directly in the table entry.

Signed-off-by: Wen Yang <wenyang.linux@...mail.com>
Cc: Eric W. Biederman <ebiederm@...ssion.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/notify/inotify/inotify_user.c | 49 +++++++++++++-------------------
 1 file changed, 20 insertions(+), 29 deletions(-)

diff --git a/fs/notify/inotify/inotify_user.c b/fs/notify/inotify/inotify_user.c
index 85d8fdd55329..b346d61179ea 100644
--- a/fs/notify/inotify/inotify_user.c
+++ b/fs/notify/inotify/inotify_user.c
@@ -55,36 +55,27 @@ struct kmem_cache *inotify_inode_mark_cachep __ro_after_init;
 
 #include <linux/sysctl.h>
 
-static long it_zero = 0;
-static long it_int_max = INT_MAX;
-
 static struct ctl_table inotify_table[] = {
-	{
-		.procname	= "max_user_instances",
-		.data		= &init_user_ns.ucount_max[UCOUNT_INOTIFY_INSTANCES],
-		.maxlen		= sizeof(long),
-		.mode		= 0644,
-		.proc_handler	= proc_doulongvec_minmax,
-		.extra1		= &it_zero,
-		.extra2		= &it_int_max,
-	},
-	{
-		.procname	= "max_user_watches",
-		.data		= &init_user_ns.ucount_max[UCOUNT_INOTIFY_WATCHES],
-		.maxlen		= sizeof(long),
-		.mode		= 0644,
-		.proc_handler	= proc_doulongvec_minmax,
-		.extra1		= &it_zero,
-		.extra2		= &it_int_max,
-	},
-	{
-		.procname	= "max_queued_events",
-		.data		= &inotify_max_queued_events,
-		.maxlen		= sizeof(int),
-		.mode		= 0644,
-		.proc_handler	= proc_dointvec_minmax,
-		.extra1		= SYSCTL_ZERO
-	},
+	CTL_TABLE_ENTRY_MINMAX("max_user_instances",
+			       &init_user_ns.ucount_max[UCOUNT_INOTIFY_INSTANCES],
+			       sizeof(long),
+			       0644,
+			       proc_doulongvec_minmax,
+			       SYSCTL_NUMERIC_ZERO,
+			       SYSCTL_NUMERIC_INT_MAX),
+	CTL_TABLE_ENTRY_MINMAX("max_user_watches",
+			       &init_user_ns.ucount_max[UCOUNT_INOTIFY_WATCHES],
+			       sizeof(long),
+			       0644,
+			       proc_doulongvec_minmax,
+			       SYSCTL_NUMERIC_ZERO,
+			       SYSCTL_NUMERIC_INT_MAX),
+	CTL_TABLE_ENTRY_MIN("max_queued_events",
+			    &inotify_max_queued_events,
+			    sizeof(int),
+			    0644,
+			    proc_dointvec_minmax,
+			    SYSCTL_NUMERIC_ZERO),
 };
 
 static void __init inotify_sysctls_init(void)
-- 
2.25.1