mirror of
https://github.com/OpenVoiceOS/OpenVoiceOS
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44 lines
1.5 KiB
Diff
44 lines
1.5 KiB
Diff
From db621f13961fb858c2545305b62a569ccf95314e Mon Sep 17 00:00:00 2001
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From: John Ogness <john.ogness@linutronix.de>
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Date: Thu, 14 Dec 2023 20:48:23 +0000
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Subject: [PATCH 123/198] panic: Flush kernel log buffer at the end
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If the kernel crashes in a context where printk() calls always
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defer printing (such as in NMI or inside a printk_safe section)
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then the final panic messages will be deferred to irq_work. But
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if irq_work is not available, the messages will not get printed
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unless explicitly flushed. The result is that the final
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"end Kernel panic" banner does not get printed.
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Add one final flush after the last printk() call to make sure
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the final panic messages make it out as well.
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Signed-off-by: John Ogness <john.ogness@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 | 8 ++++++++
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1 file changed, 8 insertions(+)
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diff --git a/kernel/panic.c b/kernel/panic.c
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index ffa037fa777d..ef9f9a4e928d 100644
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--- a/kernel/panic.c
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+++ b/kernel/panic.c
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@@ -442,6 +442,14 @@ void panic(const char *fmt, ...)
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/* Do not scroll important messages printed above */
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suppress_printk = 1;
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+
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+ /*
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+ * The final messages may not have been printed if in a context that
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+ * defers printing (such as NMI) and irq_work is not available.
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+ * Explicitly flush the kernel log buffer one last time.
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+ */
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+ console_flush_on_panic(CONSOLE_FLUSH_PENDING);
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+
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local_irq_enable();
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for (i = 0; ; i += PANIC_TIMER_STEP) {
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touch_softlockup_watchdog();
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--
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2.44.0
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