44 lines
1.3 KiB
Diff
44 lines
1.3 KiB
Diff
From b6903e4522c7e636e2cd825a56715a459e6fc52d Mon Sep 17 00:00:00 2001
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From: Thomas Gleixner <tglx@linutronix.de>
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Date: Mon, 11 Sep 2023 15:53:04 +0000
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Subject: [PATCH 143/196] panic: Mark emergency section in warn
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Mark the full contents of __warn() as an emergency section. In
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this section, the CPU will not perform console output for the
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printk() calls. Instead, a flushing of the console output will
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triggered when exiting the emergency section.
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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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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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diff --git a/kernel/panic.c b/kernel/panic.c
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index f0e91a0c4001..147803c3a402 100644
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--- a/kernel/panic.c
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+++ b/kernel/panic.c
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@@ -663,6 +663,8 @@ 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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@@ -693,6 +695,8 @@ void __warn(const char *file, int line, void *caller, unsigned taint,
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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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--
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2.43.2
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