swh:1:snp:c3bf2749e3476071fa748f67b0ffa2fdc5fe49d9
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Tip revision: 136057256686de39cc3a07c2e39ef6bc43003ff6 authored by Linus Torvalds on 21 November 2021, 21:47:39 UTC
Linux 5.16-rc2
Tip revision: 1360572
clearing-warn-once.rst
Clearing WARN_ONCE
------------------

WARN_ONCE / WARN_ON_ONCE / printk_once only emit a message once.

echo 1 > /sys/kernel/debug/clear_warn_once

clears the state and allows the warnings to print once again.
This can be useful after test suite runs to reproduce problems.
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