From: Andy Shevchenko <andy.shevchenko@gmail.com>
To: David Laight <David.Laight@aculab.com>
Cc: Brian Gerst <brgerst@gmail.com>,
Nick Desaulniers <ndesaulniers@google.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Sedat Dilek <sedat.dilek@gmail.com>,
stable <stable@vger.kernel.org>,
Jesse Brandeburg <jesse.brandeburg@intel.com>,
"kernelci . org bot" <bot@kernelci.org>,
Andy Shevchenko <andriy.shevchenko@intel.com>,
Ilie Halip <ilie.halip@gmail.com>,
"the arch/x86 maintainers" <x86@kernel.org>,
"H. Peter Anvin" <hpa@zytor.com>, Marco Elver <elver@google.com>,
"Paul E. McKenney" <paulmck@kernel.org>,
"Peter Zijlstra (Intel)" <peterz@infradead.org>,
Daniel Axtens <dja@axtens.net>,
Masahiro Yamada <yamada.masahiro@socionext.com>,
Luc Van Oostenryck <luc.vanoostenryck@gmail.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
"clang-built-linux@googlegroups.com"
<clang-built-linux@googlegroups.com>
Subject: Re: [PATCH] x86: bitops: fix build regression
Date: Thu, 7 May 2020 12:17:05 +0300 [thread overview]
Message-ID: <CAHp75VceSvk25rbbS-hmJKAgP4Xe+U6tFQDHBEA=9EHnzBH5+g@mail.gmail.com> (raw)
In-Reply-To: <60b16c05ca9e4954a7e4fcdd3075e23d@AcuMS.aculab.com>
On Thu, May 7, 2020 at 10:50 AM David Laight <David.Laight@aculab.com> wrote:
> From: Brian Gerst
> > Sent: 07 May 2020 07:18
> > I think a better fix would be to make CONST_MASK() return a u8 value
> > rather than have to cast on every use.
>
> Or assign to a local variable - then it doesn't matter how
> the value is actually calculated. So:
> u8 mask = CONST_MASK(nr);
Another case with negation won't work like this I believe.
So, I thin kthe patch we have is good enough, no need to seek for an evil.
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2020-05-07 9:17 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-05 17:44 [PATCH] x86: bitops: fix build regression Nick Desaulniers
2020-05-05 18:07 ` hpa
2020-05-05 18:22 ` Nick Desaulniers
2020-05-07 11:34 ` Peter Zijlstra
2020-05-07 14:00 ` Brian Gerst
2020-05-07 19:19 ` Nick Desaulniers
2020-05-07 22:29 ` Nick Desaulniers
2020-05-08 1:57 ` Brian Gerst
2020-05-08 17:21 ` Nick Desaulniers
2020-05-08 17:31 ` H. Peter Anvin
2020-05-10 11:59 ` David Laight
2020-05-10 12:33 ` hpa
2020-05-07 19:29 ` hpa
2020-05-06 4:30 ` Nathan Chancellor
2020-05-06 9:22 ` Sedat Dilek
2020-05-06 15:41 ` Nathan Chancellor
2020-05-06 16:37 ` Nick Desaulniers
2020-05-06 16:55 ` Ilie Halip
2020-05-07 6:18 ` Brian Gerst
2020-05-07 7:02 ` hpa
2020-05-07 13:32 ` Brian Gerst
2020-05-07 15:09 ` David Laight
2020-05-07 19:31 ` hpa
2020-05-07 19:29 ` hpa
2020-05-07 7:44 ` David Laight
2020-05-07 7:59 ` hpa
2020-05-07 8:35 ` David Laight
2020-05-07 8:38 ` hpa
2020-05-07 9:17 ` Andy Shevchenko [this message]
2020-05-07 19:22 ` Nick Desaulniers
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