linux-kernel - Re: [GIT PULL] hotfixes for 6.3-rc1

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <87jzzu7jt9.fsf@yhuang6-desk2.ccr.corp.intel.com>
Date:   Mon, 06 Mar 2023 09:25:06 +0800
From:   "Huang, Ying" <ying.huang@...el.com>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        mm-commits@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [GIT PULL] hotfixes for 6.3-rc1

Hi, Linus,

Linus Torvalds <torvalds@...ux-foundation.org> writes:

> On Sat, Mar 4, 2023 at 3:21 PM Andrew Morton <akpm@...ux-foundation.org> wrote:
>>
>> Ah. Ying did it this way:
>
> Yeah, I saw that patch flying past, but I actually think that it only
> silences the warning almost by mistake. There's nothing fundamental in
> there that a compiler wouldn't just follow across two assignments, and
> it just happens to now not trigger any more.
>
> Assigning to a union entry is a more fundamental operation in that
> respect. Not that the compiler still doesn't see that it's assigning a
> value that in the end is not really type compatible, so a different
> version of gcc could still warn, but at that point I feel like it's
> more of an actual compiler bug than just "oh, the compiler didn't
> happen to follow the cast through a temporary".

Yes.  Your fix is much better.  This can be used for
__page_set_anon_rmap() family too to make the code look better?

Best Regards,
Huang, Ying