Merge tag 'csky-for-linus-5.2-perf-unwind-libdw' of git://github.com/c-sky/csky-linux

[platform/kernel/linux-rpi.git] / Documentation / clearing-warn-once.txt

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.