linux-kernel - Re: [PATCH] x86: modernize sync

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Message-Id: <5B31EA9C02000078001CDD33@prv1-mh.provo.novell.com>
Date:   Tue, 26 Jun 2018 01:26:20 -0600
From:   "Jan Beulich" <JBeulich@...e.com>
To:     "Ingo Molnar" <mingo@...nel.org>
Cc:     <mingo@...e.hu>, <tglx@...utronix.de>,
        <linux-kernel@...r.kernel.org>, <hpa@...or.com>
Subject: Re: [PATCH] x86: modernize sync_bitops.h

>>> On 26.06.18 at 09:18, <mingo@...nel.org> wrote:
> * Jan Beulich <JBeulich@...e.com> wrote:
> 
>> Add missing insn suffixes and use rmwcc.h just like was (more or less)
>> recently done for bitops.h as well.
>> 
>> Signed-off-by: Jan Beulich <jbeulich@...e.com>
>> ---
>>  arch/x86/include/asm/sync_bitops.h |   34 ++++++++++++----------------------
>>  1 file changed, 12 insertions(+), 22 deletions(-)
> 
> Have you verified that a typical x86 vmlinux (with defconfig for example) is the 
> same before/after?

It works the same, but the binary is unlikely to be the same with the switch
to condition code asm() outputs.

Jan