linux-kernel - Re: [PATCH AUTOSEL 4.19 5/9] sched_getaffinity: don't assume 'cpumask

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Message-ID: <CAHk-=whZ8r85GhA=n8=NJCXOnpJ5KNqitV2FK2YnK73+Z7tzUg@mail.gmail.com>
Date:   Wed, 22 Mar 2023 14:08:54 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Sasha Levin <sashal@...nel.org>
Cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Ryan Roberts <ryan.roberts@....com>,
        Yury Norov <yury.norov@...il.com>, mingo@...hat.com,
        peterz@...radead.org, juri.lelli@...hat.com,
        vincent.guittot@...aro.org
Subject: Re: [PATCH AUTOSEL 4.19 5/9] sched_getaffinity: don't assume
 'cpumask_size()' is fully initialized

On Wed, Mar 22, 2023 at 1:09 PM Sasha Levin <sashal@...nel.org> wrote:
>
> The getaffinity() system call uses 'cpumask_size()' to decide how big
> the CPU mask is - so far so good.  It is indeed the allocation size of a
> cpumask. [...]

Same comment as about commit 8ca09d5fa354 - this is a fine cleanup /
fix and might be worth backporting just for that, but it didn't really
turn into an actual visible bug until commit 596ff4a09b89.

                Linus