41 lines
1.3 KiB
Diff
41 lines
1.3 KiB
Diff
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From: Thomas Gleixner <tglx@linutronix.de>
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Date: Tue, 20 Aug 2024 08:35:58 +0206
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Subject: [PATCH 32/54] panic: Mark emergency section in warn
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Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/6.11/older/patches-6.11-rt7.tar.xz
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Mark the full contents of __warn() as an emergency section. In
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this section, every printk() call will attempt to directly
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flush to the consoles using the EMERGENCY priority.
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Co-developed-by: John Ogness <john.ogness@linutronix.de>
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Signed-off-by: John Ogness <john.ogness@linutronix.de>
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Signed-off-by: Thomas Gleixner (Intel) <tglx@linutronix.de>
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Reviewed-by: Petr Mladek <pmladek@suse.com>
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Link: https://lore.kernel.org/r/20240820063001.36405-33-john.ogness@linutronix.de
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Signed-off-by: Petr Mladek <pmladek@suse.com>
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Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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---
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kernel/panic.c | 4 ++++
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1 file changed, 4 insertions(+)
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--- a/kernel/panic.c
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+++ b/kernel/panic.c
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@@ -718,6 +718,8 @@ struct warn_args {
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void __warn(const char *file, int line, void *caller, unsigned taint,
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struct pt_regs *regs, struct warn_args *args)
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{
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+ nbcon_cpu_emergency_enter();
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+
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disable_trace_on_warning();
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if (file)
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@@ -753,6 +755,8 @@ void __warn(const char *file, int line,
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/* Just a warning, don't kill lockdep. */
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add_taint(taint, LOCKDEP_STILL_OK);
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+
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+ nbcon_cpu_emergency_exit();
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}
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#ifdef CONFIG_BUG
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