linux-kernel - Re: [PATCH] EDAC/amd64: remove unneeded call to reserve_mc_sibling

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Date:   Mon, 13 Feb 2023 13:17:51 -0800
From:   Tom Rix <trix@...hat.com>
To:     Nathan Chancellor <nathan@...nel.org>,
        Borislav Petkov <bp@...en8.de>
Cc:     Yazen Ghannam <yazen.ghannam@....com>, tony.luck@...el.com,
        james.morse@....com, mchehab@...nel.org, rric@...nel.org,
        linux-edac@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] EDAC/amd64: remove unneeded call to
 reserve_mc_sibling_devs()


On 2/13/23 12:28 PM, Nathan Chancellor wrote:
> On Mon, Feb 13, 2023 at 09:23:47PM +0100, Borislav Petkov wrote:
>> On Mon, Feb 13, 2023 at 08:12:38PM +0000, Yazen Ghannam wrote:
>>> These errors are encountered when extra warnings are enabled, correct?
>> It says so in the warning which one it is: -Werror,-Wsometimes-uninitialized
>>
>> Don't know if we enable that one for clang with W= or Nathan adds
>> additional switches.
> -Wsometimes-uninitialized is part of clang's -Wall so it is on by
> default in all builds, regardless of W=
>
> -Werror comes from CONFIG_WERROR, which is enabled with allmodconfig.
>
>>> I think the following patch would resolve this issue. This is part of a set
>>> that isn't fully applied.
>>> https://lore.kernel.org/linux-edac/20230127170419.1824692-12-yazen.ghannam@amd.com/
>>>
>>> Boris,
>>> Do you think one of these patches should be applied or just hold off until the
>>> entire original set is applied?
>> I still wanted to go through the rest but I'm not sure I'll have time
>> for it before the merge window. So unless this is breaking some silly
>> testing scenario, I'd say I'll leave things as they are.
> This breaks allmodconfig with clang, so it would be great if one of
> these solutions was applied in the meantime.

This happens at least on allyesconfig clang W=1,2, i do not know about 
default, it's in a bad state as well.

It would be great if the clang build was working.

Nathan's patch is fine, go with that.

Tom

>
> Cheers,
> Nathan
>