linux-kernel - [PATCH 06/12] fork: mv threads-max into kernel/fork.c

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Message-Id: <20250509-jag-mv_ctltables_iter2-v1-6-d0ad83f5f4c3@kernel.org>
Date: Fri, 09 May 2025 14:54:10 +0200
From: Joel Granados <joel.granados@...nel.org>
To: Luis Chamberlain <mcgrof@...nel.org>, Petr Pavlu <petr.pavlu@...e.com>, 
 Sami Tolvanen <samitolvanen@...gle.com>, 
 Daniel Gomez <da.gomez@...sung.com>, Kees Cook <kees@...nel.org>, 
 Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
 Will Deacon <will@...nel.org>, Boqun Feng <boqun.feng@...il.com>, 
 Waiman Long <longman@...hat.com>, "Paul E. McKenney" <paulmck@...nel.org>, 
 Frederic Weisbecker <frederic@...nel.org>, 
 Neeraj Upadhyay <neeraj.upadhyay@...nel.org>, 
 Joel Fernandes <joel@...lfernandes.org>, 
 Josh Triplett <josh@...htriplett.org>, Uladzislau Rezki <urezki@...il.com>, 
 Steven Rostedt <rostedt@...dmis.org>, 
 Mathieu Desnoyers <mathieu.desnoyers@...icios.com>, 
 Lai Jiangshan <jiangshanlai@...il.com>, Zqiang <qiang.zhang1211@...il.com>, 
 Andrew Morton <akpm@...ux-foundation.org>, 
 "James E.J. Bottomley" <James.Bottomley@...senPartnership.com>, 
 Helge Deller <deller@....de>, 
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 Jiri Slaby <jirislaby@...nel.org>
Cc: linux-modules@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-fsdevel@...r.kernel.org, rcu@...r.kernel.org, linux-mm@...ck.org, 
 linux-parisc@...r.kernel.org, linux-serial@...r.kernel.org, 
 Joel Granados <joel.granados@...nel.org>
Subject: [PATCH 06/12] fork: mv threads-max into kernel/fork.c

make sysctl_max_threads static as it no longer needs to be exported into
sysctl.c.

This is part of a greater effort to move ctl tables into their
respective subsystems which will reduce the merge conflicts in
kernel/sysctl.c.

Signed-off-by: Joel Granados <joel.granados@...nel.org>
---
 include/linux/sysctl.h |  3 ---
 kernel/fork.c          | 20 +++++++++++++++++++-
 kernel/sysctl.c        |  7 -------
 3 files changed, 19 insertions(+), 11 deletions(-)

diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h
index ae762eabb7c9715e973356cadafbaaea3f20c7e9..30bcbc59d12d2f4cec7545e7ee3f5ea5f0eefbd7 100644
--- a/include/linux/sysctl.h
+++ b/include/linux/sysctl.h
@@ -284,7 +284,4 @@ static inline bool sysctl_is_alias(char *param)
 }
 #endif /* CONFIG_SYSCTL */

-int sysctl_max_threads(const struct ctl_table *table, int write, void *buffer,
-		size_t *lenp, loff_t *ppos);
-
 #endif /* _LINUX_SYSCTL_H */
diff --git a/kernel/fork.c b/kernel/fork.c
index c4b26cd8998b8e7b2b516e0bb0b1d4676ff644dc..ed39064b86c25849c4b21cf99ac68dded05038b3 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -3470,7 +3470,7 @@ int unshare_files(void)
 	return 0;
 }

-int sysctl_max_threads(const struct ctl_table *table, int write,
+static int sysctl_max_threads(const struct ctl_table *table, int write,
 		       void *buffer, size_t *lenp, loff_t *ppos)
 {
 	struct ctl_table t;
@@ -3492,3 +3492,21 @@ int sysctl_max_threads(const struct ctl_table *table, int write,

 	return 0;
 }
+
+static const struct ctl_table fork_sysctl_table[] = {
+	{
+		.procname	= "threads-max",
+		.data		= NULL,
+		.maxlen		= sizeof(int),
+		.mode		= 0644,
+		.proc_handler	= sysctl_max_threads,
+	},
+};
+
+static int __init init_fork_sysctl(void)
+{
+	register_sysctl_init("kernel", fork_sysctl_table);
+	return 0;
+}
+
+subsys_initcall(init_fork_sysctl);
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 718140251972b797f5aa5a056de40e8856805eed..febf328054aa5a7b2462a256598f86f5ded87c90 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -1630,13 +1630,6 @@ static const struct ctl_table kern_table[] = {
 		.proc_handler	= proc_do_cad_pid,
 	},
 #endif
-	{
-		.procname	= "threads-max",
-		.data		= NULL,
-		.maxlen		= sizeof(int),
-		.mode		= 0644,
-		.proc_handler	= sysctl_max_threads,
-	},
 	{
 		.procname	= "overflowuid",
 		.data		= &overflowuid,

-- 
2.47.2