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Message-Id: <20240820063001.36405-33-john.ogness@linutronix.de>
Date: Tue, 20 Aug 2024 08:35:58 +0206
From: John Ogness <john.ogness@...utronix.de>
To: Petr Mladek <pmladek@...e.com>
Cc: Sergey Senozhatsky <senozhatsky@...omium.org>,
Steven Rostedt <rostedt@...dmis.org>,
Thomas Gleixner <tglx@...utronix.de>,
linux-kernel@...r.kernel.org,
Andrew Morton <akpm@...ux-foundation.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Jani Nikula <jani.nikula@...el.com>,
Uros Bizjak <ubizjak@...il.com>,
Feng Tang <feng.tang@...el.com>
Subject: [PATCH printk v8 32/35] panic: Mark emergency section in warn
From: Thomas Gleixner <tglx@...utronix.de>
Mark the full contents of __warn() as an emergency section. In
this section, every printk() call will attempt to directly
flush to the consoles using the EMERGENCY priority.
Co-developed-by: John Ogness <john.ogness@...utronix.de>
Signed-off-by: John Ogness <john.ogness@...utronix.de>
Signed-off-by: Thomas Gleixner (Intel) <tglx@...utronix.de>
Reviewed-by: Petr Mladek <pmladek@...e.com>
---
kernel/panic.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/kernel/panic.c b/kernel/panic.c
index 93096d5abcc7..1a10b6e2a855 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -718,6 +718,8 @@ struct warn_args {
void __warn(const char *file, int line, void *caller, unsigned taint,
struct pt_regs *regs, struct warn_args *args)
{
+ nbcon_cpu_emergency_enter();
+
disable_trace_on_warning();
if (file)
@@ -753,6 +755,8 @@ void __warn(const char *file, int line, void *caller, unsigned taint,
/* Just a warning, don't kill lockdep. */
add_taint(taint, LOCKDEP_STILL_OK);
+
+ nbcon_cpu_emergency_exit();
}
#ifdef CONFIG_BUG
--
2.39.2
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