linux-kernel - Re: [PATCH 11/11] drivers/edac: convert pci counters to counter

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Date:   Mon, 28 Sep 2020 14:05:00 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Shuah Khan <skhan@...uxfoundation.org>
Cc:     mchehab@...nel.org, tony.luck@...el.com, james.morse@....com,
        rric@...nel.org, gregkh@...uxfoundation.org, keescook@...omium.org,
        linux-edac@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 11/11] drivers/edac: convert pci counters to
 counter_atomic32

On Fri, Sep 25, 2020 at 05:47:25PM -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 pci counters keep track of pci parity and
> non-parity errors. Convert them to use counter_atomic32.
> 
> Overflow will wrap around and reset the counts as was the case prior to
> the conversion.
> 
> Signed-off-by: Shuah Khan <skhan@...uxfoundation.org>
> ---
>  drivers/edac/edac_pci.h       |  5 +++--
>  drivers/edac/edac_pci_sysfs.c | 28 ++++++++++++++--------------
>  2 files changed, 17 insertions(+), 16 deletions(-)

The patches I was Cced - this one and the apei one, look ok to me.

Acked-by: Borislav Petkov <bp@...e.de>

Thx.

-- 
Regards/Gruss,
    Boris.

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