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Tip revision: 609488bc979f99f805f34e9a32c1e3b71179d10b authored by Linus Torvalds on 28 July 2019, 19:47:02 UTC
Linux 5.3-rc2
Tip revision: 609488b
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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