linux-kernel - [PATCH v3 1/6] panic: Separate sysctl logic from CONFIG

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Message-Id: <20221117234328.594699-1-keescook@chromium.org>
Date:   Thu, 17 Nov 2022 15:43:21 -0800
From:   Kees Cook <keescook@...omium.org>
To:     Jann Horn <jannh@...gle.com>
Cc:     Kees Cook <keescook@...omium.org>, Petr Mladek <pmladek@...e.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        tangmeng <tangmeng@...ontech.com>,
        "Guilherme G. Piccoli" <gpiccoli@...lia.com>,
        Tiezhu Yang <yangtiezhu@...ngson.cn>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Luis Chamberlain <mcgrof@...nel.org>,
        Seth Jenkins <sethjenkins@...gle.com>,
        Greg KH <gregkh@...uxfoundation.org>,
        Linus Torvalds <torvalds@...uxfoundation.org>,
        Andy Lutomirski <luto@...nel.org>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        Arnd Bergmann <arnd@...db.de>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Juri Lelli <juri.lelli@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ben Segall <bsegall@...gle.com>,
        Daniel Bristot de Oliveira <bristot@...hat.com>,
        Valentin Schneider <vschneid@...hat.com>,
        Andrey Ryabinin <ryabinin.a.a@...il.com>,
        Alexander Potapenko <glider@...gle.com>,
        Andrey Konovalov <andreyknvl@...il.com>,
        Vincenzo Frascino <vincenzo.frascino@....com>,
        David Gow <davidgow@...gle.com>,
        "Paul E. McKenney" <paulmck@...nel.org>,
        Jonathan Corbet <corbet@....net>,
        Baolin Wang <baolin.wang@...ux.alibaba.com>,
        "Jason A. Donenfeld" <Jason@...c4.com>,
        Eric Biggers <ebiggers@...gle.com>,
        Huang Ying <ying.huang@...el.com>,
        Anton Vorontsov <anton@...msg.org>,
        Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        Laurent Dufour <ldufour@...ux.ibm.com>,
        Rob Herring <robh@...nel.org>, linux-kernel@...r.kernel.org,
        kasan-dev@...glegroups.com, linux-mm@...ck.org,
        linux-doc@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: [PATCH v3 1/6] panic: Separate sysctl logic from CONFIG_SMP

In preparation for adding more sysctls directly in kernel/panic.c, split
CONFIG_SMP from the logic that adds sysctls.

Cc: Petr Mladek <pmladek@...e.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: tangmeng <tangmeng@...ontech.com>
Cc: "Guilherme G. Piccoli" <gpiccoli@...lia.com>
Cc: Tiezhu Yang <yangtiezhu@...ngson.cn>
Cc: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Reviewed-by: Luis Chamberlain <mcgrof@...nel.org>
Signed-off-by: Kees Cook <keescook@...omium.org>
---
 kernel/panic.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/kernel/panic.c b/kernel/panic.c
index da323209f583..d843d036651e 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -75,8 +75,9 @@ ATOMIC_NOTIFIER_HEAD(panic_notifier_list);
 
 EXPORT_SYMBOL(panic_notifier_list);
 
-#if defined(CONFIG_SMP) && defined(CONFIG_SYSCTL)
+#ifdef CONFIG_SYSCTL
 static struct ctl_table kern_panic_table[] = {
+#ifdef CONFIG_SMP
 	{
 		.procname       = "oops_all_cpu_backtrace",
 		.data           = &sysctl_oops_all_cpu_backtrace,
@@ -86,6 +87,7 @@ static struct ctl_table kern_panic_table[] = {
 		.extra1         = SYSCTL_ZERO,
 		.extra2         = SYSCTL_ONE,
 	},
+#endif
 	{ }
 };
 
-- 
2.34.1