[SRU] [L/M] [PATCH 0/1] Fix RCU warning on AMD laptops
Kai-Heng Feng
kai.heng.feng at canonical.com
Mon Sep 18 04:58:40 UTC 2023
BugLink: https://bugs.launchpad.net/bugs/2036377
[Impact]
Scary kernel splat about RCU can be observed everytime laptop resumes
from suspend.
[Fix]
Use non-atomic notifier for power supply change to relax the constraint.
[Test]
Once the fix is applied, no more RCU warning can be found after several
suspend/resume cycle.
[Where problems could occur]
Essentially no regression potential. Atomic notifier should be used by
core kernel, and things like power supply doesn't need to be atomic
anyway.
Kai-Heng Feng (1):
power: supply: core: Use blocking_notifier_call_chain to avoid RCU
complaint
drivers/power/supply/power_supply_core.c | 8 ++++----
include/linux/power_supply.h | 2 +-
2 files changed, 5 insertions(+), 5 deletions(-)
--
2.34.1
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