Re: [PATCH v2 09/11] drivers/char/ipmi: convert stats to use counter_atomic32

[Kees Cook]

On Tue, Oct 06, 2020 at 02:44:40PM -0600, Shuah Khan wrote:
> counter_atomic* is introduced to be used when a variable is used as
> a simple counter and doesn't guard object lifetimes. This clearly
> differentiates atomic_t usages that guard object lifetimes.
> 
> counter_atomic* variables will wrap around to 0 when it overflows and
> should not be used to guard resource lifetimes, device usage and
> open counts that control state changes, and pm states.
> 
> atomic_t variables used for stats are atomic counters. Overflow will
> wrap around and reset the stats and no change with the conversion.
> 
> Convert them to use counter_atomic32.
> 
> Reviewed-by: Corey Minyard <cminyard@xxxxxxxxxx>
> Signed-off-by: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx>

Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx>

-- 
Kees Cook