From: Nick Desaulniers <ndesaulniers@google.com>
To: Arnd Bergmann <arnd@arndb.de>
Cc: linux-arch <linux-arch@vger.kernel.org>,
Shuah Khan <shuah@kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
"open list:KERNEL SELFTEST FRAMEWORK"
<linux-kselftest@vger.kernel.org>,
Dmitry Safonov <0x7f454c46@gmail.com>,
Mark Salyzyn <salyzyn@android.com>,
Huw Davies <huw@codeweavers.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Daniel Lezcano <daniel.lezcano@linaro.org>,
Will Deacon <will.deacon@arm.com>,
linux-mips@vger.kernel.org, Ralf Baechle <ralf@linux-mips.org>,
Russell King <linux@armlinux.org.uk>,
clang-built-linux <clang-built-linux@googlegroups.com>,
Paul Burton <paul.burton@mips.com>,
Andy Lutomirski <luto@kernel.org>,
Rasmus Villemoes <linux@rasmusvillemoes.dk>,
Thomas Gleixner <tglx@linutronix.de>,
Vincenzo Frascino <vincenzo.frascino@arm.com>,
Peter Collingbourne <pcc@google.com>,
Linux ARM <linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH] vsyscall: use __iter_div_u64_rem()
Date: Thu, 11 Jul 2019 10:14:10 -0700 [thread overview]
Message-ID: <CAKwvOdkubvsRCnJKCaesB=PF=DgXfsBzwzR8kyE9NzWPU8Gehg@mail.gmail.com> (raw)
In-Reply-To: <CAK8P3a1EBaWdbAEzirFDSgHVJMtWjuNt2HGG8z+vpXeNHwETFQ@mail.gmail.com>
On Thu, Jul 11, 2019 at 5:28 AM Arnd Bergmann <arnd@arndb.de> wrote:
> clang does not like an inline assembly with a "=q" contraint for
> a 64-bit output:
Seems like starting in GCC 7, GCC may not like it either:
https://godbolt.org/z/UyBUfh
it simply warns then proceeds with code gen. Another difference may
come from when GCC vs Clang perform dead code elimination (DCE) vs
semantic analysis.
--
Thanks,
~Nick Desaulniers
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2019-07-11 17:14 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-10 13:01 [PATCH] vsyscall: use __iter_div_u64_rem() Arnd Bergmann
2019-07-10 16:56 ` Nathan Chancellor
2019-07-11 12:14 ` Vincenzo Frascino
2019-07-11 12:28 ` Arnd Bergmann
2019-07-11 13:08 ` Vincenzo Frascino
2019-07-11 17:14 ` Nick Desaulniers [this message]
2019-07-11 20:55 ` Arnd Bergmann
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='CAKwvOdkubvsRCnJKCaesB=PF=DgXfsBzwzR8kyE9NzWPU8Gehg@mail.gmail.com' \
--to=ndesaulniers@google.com \
--cc=0x7f454c46@gmail.com \
--cc=arnd@arndb.de \
--cc=catalin.marinas@arm.com \
--cc=clang-built-linux@googlegroups.com \
--cc=daniel.lezcano@linaro.org \
--cc=huw@codeweavers.com \
--cc=linux-arch@vger.kernel.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-kselftest@vger.kernel.org \
--cc=linux-mips@vger.kernel.org \
--cc=linux@armlinux.org.uk \
--cc=linux@rasmusvillemoes.dk \
--cc=luto@kernel.org \
--cc=paul.burton@mips.com \
--cc=pcc@google.com \
--cc=ralf@linux-mips.org \
--cc=salyzyn@android.com \
--cc=shuah@kernel.org \
--cc=tglx@linutronix.de \
--cc=vincenzo.frascino@arm.com \
--cc=will.deacon@arm.com \
/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;
as well as URLs for NNTP newsgroup(s).