From 9743d12d0c63968320ece31e2e48723f3235be6d Mon Sep 17 00:00:00 2001
From: Feng Tang <feng.tang@linux.alibaba.com>
Date: Thu, 3 Jul 2025 10:10:03 +0800
Subject: panic: add 'panic_sys_info=' setup option for kernel cmdline

'panic_sys_info=' sysctl interface is already added for runtime setting.
Add counterpart kernel cmdline option for boottime setting.

Link: https://lkml.kernel.org/r/20250703021004.42328-5-feng.tang@linux.alibaba.com
Signed-off-by: Feng Tang <feng.tang@linux.alibaba.com>
Suggested-by: Petr Mladek <pmladek@suse.com>
Cc: John Ogness <john.ogness@linutronix.de>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: "Paul E . McKenney" <paulmck@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
 kernel/panic.c | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'kernel/panic.c')

diff --git a/kernel/panic.c b/kernel/panic.c
index d7aa427dc23c..d9d4fcd5e318 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -143,6 +143,15 @@ static __init int kernel_panic_sysctls_init(void)
 late_initcall(kernel_panic_sysctls_init);
 #endif
 
+/* The format is "panic_sys_info=tasks,mem,locks,ftrace,..." */
+static int __init setup_panic_sys_info(char *buf)
+{
+	/* There is no risk of race in kernel boot phase */
+	panic_print = sys_info_parse_param(buf);
+	return 1;
+}
+__setup("panic_sys_info=", setup_panic_sys_info);
+
 static atomic_t warn_count = ATOMIC_INIT(0);
 
 #ifdef CONFIG_SYSFS
-- 
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