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Tip revision: e783362eb54cd99b2cac8b3a9aeac942e6f6ac07 authored by Linus Torvalds on 23 January 2022, 08:12:53 UTC
Linux 5.17-rc1
Tip revision: e783362
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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