From: Dave Hansen <dave.hansen@intel.com>
To: "Christoph Lameter (Ampere)" <cl@gentwo.org>
Cc: Peter Zijlstra <peterz@infradead.org>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Ingo Molnar <mingo@kernel.org>, Uros Bizjak <ubizjak@gmail.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
llvm@lists.linux.dev, Dennis Zhou <dennis@kernel.org>,
Tejun Heo <tj@kernel.org>, Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
Nathan Chancellor <nathan@kernel.org>,
Nick Desaulniers <ndesaulniers@google.com>,
Bill Wendling <morbo@google.com>,
Justin Stitt <justinstitt@google.com>
Subject: Re: [PATCH v1 1/1] x86/percpu: Cast -1 to argument type when comparing in percpu_add_op()
Date: Wed, 23 Oct 2024 10:15:12 -0700 [thread overview]
Message-ID: <bc707fc1-b5fe-4c2d-af88-c44737198876@intel.com> (raw)
In-Reply-To: <4b1a26b2-cccb-75d8-ee2f-f30ae211e598@gentwo.org>
On 10/22/24 16:24, Christoph Lameter (Ampere) wrote:
> On Tue, 22 Oct 2024, Dave Hansen wrote:
>
>> So I think Peter's version was the best. It shuts up clang and also
>> preserves the existing (good) gcc 'sub' behavior. I'll send it out for
>> real in a bit, but I'm thinking of something like the attached patch.
> The desired behavior is a "dec". "sub" has a longer op code AFAICT.
Gah, yes, of course. I misspoke.
We want "inc" and "dec" for +1 and -1. "add" and "sub" are heftier and
get used for everything else.
next prev parent reply other threads:[~2024-10-23 17:15 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-05 17:03 Andy Shevchenko
2024-10-16 13:37 ` Andy Shevchenko
2024-10-16 15:44 ` Dave Hansen
2024-10-16 17:03 ` Nick Desaulniers
2024-10-16 18:06 ` Andy Shevchenko
2024-10-16 18:20 ` Andy Shevchenko
2024-10-16 19:43 ` Dave Hansen
2024-10-16 19:20 ` Peter Zijlstra
2024-10-16 19:44 ` Dave Hansen
2024-10-17 18:18 ` Peter Zijlstra
2024-10-18 12:21 ` Andy Shevchenko
2024-10-22 19:53 ` Dave Hansen
2024-10-22 23:24 ` Christoph Lameter (Ampere)
2024-10-23 17:15 ` Dave Hansen [this message]
2024-10-23 21:40 ` H. Peter Anvin
2024-10-23 14:24 ` Andy Shevchenko
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=bc707fc1-b5fe-4c2d-af88-c44737198876@intel.com \
--to=dave.hansen@intel.com \
--cc=andriy.shevchenko@linux.intel.com \
--cc=bp@alien8.de \
--cc=cl@gentwo.org \
--cc=dave.hansen@linux.intel.com \
--cc=dennis@kernel.org \
--cc=hpa@zytor.com \
--cc=justinstitt@google.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=llvm@lists.linux.dev \
--cc=mingo@kernel.org \
--cc=mingo@redhat.com \
--cc=morbo@google.com \
--cc=nathan@kernel.org \
--cc=ndesaulniers@google.com \
--cc=peterz@infradead.org \
--cc=tglx@linutronix.de \
--cc=tj@kernel.org \
--cc=ubizjak@gmail.com \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox