linux-kernel - [PATCH 07/12] Input: sysrq: mv sysrq into drivers/tty/sysrq.c

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20250509-jag-mv_ctltables_iter2-v1-7-d0ad83f5f4c3@kernel.org>
Date: Fri, 09 May 2025 14:54:11 +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 07/12] Input: sysrq: mv sysrq into drivers/tty/sysrq.c

Move both sysrq ctl_table and supported sysrq_sysctl_handler helper
function into drivers/tty/sysrq.c. Replaced the __do_proc_dointvec in
helper function with do_proc_dointvec as the former is local to
kernel/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>
---
 drivers/tty/sysrq.c | 38 ++++++++++++++++++++++++++++++++++++++
 kernel/sysctl.c     | 30 ------------------------------
 2 files changed, 38 insertions(+), 30 deletions(-)

diff --git a/drivers/tty/sysrq.c b/drivers/tty/sysrq.c
index 6853c4660e7c2586487fea83c12f0b7780db1ee1..8a304189749f3e33af48141a1aba5e456616c7de 100644
--- a/drivers/tty/sysrq.c
+++ b/drivers/tty/sysrq.c
@@ -1119,6 +1119,44 @@ int sysrq_toggle_support(int enable_mask)
 }
 EXPORT_SYMBOL_GPL(sysrq_toggle_support);

+static int sysrq_sysctl_handler(const struct ctl_table *table, int write,
+				void *buffer, size_t *lenp, loff_t *ppos)
+{
+	int tmp, ret;
+	struct ctl_table t = *table;
+
+	tmp = sysrq_mask();
+	t.data = &tmp;
+
+	ret = proc_dointvec_minmax(&t, write, buffer, lenp, ppos);
+
+	if (ret || !write)
+		return ret;
+
+	if (write)
+		sysrq_toggle_support(tmp);
+
+	return 0;
+}
+
+static const struct ctl_table sysrq_sysctl_table[] = {
+	{
+		.procname	= "sysrq",
+		.data		= NULL,
+		.maxlen		= sizeof(int),
+		.mode		= 0644,
+		.proc_handler	= sysrq_sysctl_handler,
+	},
+};
+
+static int __init init_sysrq_sysctl(void)
+{
+	register_sysctl_init("kernel", sysrq_sysctl_table);
+	return 0;
+}
+
+subsys_initcall(init_sysrq_sysctl);
+
 static int __sysrq_swap_key_ops(u8 key, const struct sysrq_key_op *insert_op_p,
 				const struct sysrq_key_op *remove_op_p)
 {
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index febf328054aa5a7b2462a256598f86f5ded87c90..ebcc7d75acd9fecbf3c10f31480c3cb6960cb53e 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -31,7 +31,6 @@
 #include <linux/kernel.h>
 #include <linux/kobject.h>
 #include <linux/net.h>
-#include <linux/sysrq.h>
 #include <linux/highuid.h>
 #include <linux/writeback.h>
 #include <linux/ratelimit.h>
@@ -964,26 +963,6 @@ int proc_dou8vec_minmax(const struct ctl_table *table, int write,
 }
 EXPORT_SYMBOL_GPL(proc_dou8vec_minmax);

-#ifdef CONFIG_MAGIC_SYSRQ
-static int sysrq_sysctl_handler(const struct ctl_table *table, int write,
-				void *buffer, size_t *lenp, loff_t *ppos)
-{
-	int tmp, ret;
-
-	tmp = sysrq_mask();
-
-	ret = __do_proc_dointvec(&tmp, table, write, buffer,
-			       lenp, ppos, NULL, NULL);
-	if (ret || !write)
-		return ret;
-
-	if (write)
-		sysrq_toggle_support(tmp);
-
-	return 0;
-}
-#endif
-
 static int __do_proc_doulongvec_minmax(void *data,
 		const struct ctl_table *table, int write,
 		void *buffer, size_t *lenp, loff_t *ppos,
@@ -1612,15 +1591,6 @@ static const struct ctl_table kern_table[] = {
 		.proc_handler	= proc_dostring,
 	},
 #endif
-#ifdef CONFIG_MAGIC_SYSRQ
-	{
-		.procname	= "sysrq",
-		.data		= NULL,
-		.maxlen		= sizeof (int),
-		.mode		= 0644,
-		.proc_handler	= sysrq_sysctl_handler,
-	},
-#endif
 #ifdef CONFIG_PROC_SYSCTL
 	{
 		.procname	= "cad_pid",

-- 
2.47.2