[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20240502213839.376636-28-john.ogness@linutronix.de>
Date: Thu, 2 May 2024 23:44:36 +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>,
Kefeng Wang <wangkefeng.wang@...wei.com>,
Uros Bizjak <ubizjak@...il.com>,
Lukas Wunner <lukas@...ner.de>,
Arnd Bergmann <arnd@...db.de>
Subject: [PATCH printk v5 27/30] 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, the CPU will not perform console output for the
printk() calls. Instead, a flushing of the console output is
triggered when exiting the emergency section.
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 de8115c829cf..ee03193f9495 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -667,6 +667,8 @@ 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)
@@ -697,6 +699,8 @@ 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
Powered by blists - more mailing lists