linux-kernel - Re: [PATCH] [v2] waitqueue: shut up clang -Wuninitialized warnings

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] [day] [month] [year] [list]

Message-ID: <20190724073130.GH3402@hirez.programming.kicks-ass.net>
Date:   Wed, 24 Jul 2019 09:31:30 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Nick Desaulniers <ndesaulniers@...gle.com>
Cc:     Nathan Chancellor <natechancellor@...il.com>,
        Arnd Bergmann <arnd@...db.de>, Ingo Molnar <mingo@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        clang-built-linux <clang-built-linux@...glegroups.com>
Subject: Re: [PATCH] [v2] waitqueue: shut up clang -Wuninitialized warnings

On Tue, Jul 23, 2019 at 01:54:03PM -0700, Nick Desaulniers wrote:
> Note that pre-clang-9 can be used for LTS x86_64; I don't think
> CONFIG_JUMP_LABEL was made mandatory for x86 until 4.20 release, IIRC.
> There's only a small window of non LTS kernels and only for x86 where
> clang-9+ is really necessary.

Given all the code-gen issues we've been finding, I wouldn't want to
touch a pre-9 clang. Irrespective of wether it builds or not, it's
absolutely unreliable crap.