ACK: [SRU] [L/M] [PATCH 0/1] Fix RCU warning on AMD laptops

[Tim Gardner]

On 9/17/23 10:58 PM, Kai-Heng Feng wrote:
> 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(-)
> 
Acked-by: Tim Gardner <tim.gardner at canonical.com>
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Tim Gardner
Canonical, Inc