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panic: Mark emergency section in warn

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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@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Signed-off-by: Thomas Gleixner (Intel) <tglx@linutronix.de>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/20240820063001.36405-33-john.ogness@linutronix.de
Signed-off-by: Petr Mladek <pmladek@suse.com>
This commit is contained in:
Thomas Gleixner
2024-08-20 08:35:58 +02:06
committed by Petr Mladek
parent ecb5e1aa82
commit 4833794db6
1 changed files with 4 additions and 0 deletions
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4
kernel/panic.c
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@@ -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