linux-kernel - Re: [PATCH] lib/genalloc: use try_cmpxchg in {set,clear}_bits

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Message-ID: <CAHk-=wiRtgOweogzkky6phOSCySWRzWmDQ1S7J5xxQR2UCJ+dg@mail.gmail.com>
Date:   Mon, 23 Jan 2023 17:51:00 -0800
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Mateusz Guzik <mjguzik@...il.com>
Cc:     Al Viro <viro@...iv.linux.org.uk>, Uros Bizjak <ubizjak@...il.com>,
        David Laight <David.Laight@...lab.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] lib/genalloc: use try_cmpxchg in {set,clear}_bits_ll

On Mon, Jan 23, 2023 at 4:11 PM Mateusz Guzik <mjguzik@...il.com> wrote:
>
> On another point how to end up dealing with lockref less, I have to
> note glibc switched fstat(fd, buf) to use newfstatat(fd, "", buf,
> AT_EMPTY_PATH) internally.

Yeah, that's just plain stupid.

I don't know what the thinking (or rather, lack-thereof) was inside
glibc for that one.

              Linus