linux-kernel - Re: [RFC PATCH v2 7/9] arm64: allocate sys

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Message-ID: <2075941251.9404.1442421484155.JavaMail.zimbra@efficios.com>
Date:	Wed, 16 Sep 2015 16:38:04 +0000 (UTC)
From:	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
To:	Will Deacon <will.deacon@....com>
Cc:	Catalin Marinas <Catalin.Marinas@....com>,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-api <linux-api@...r.kernel.org>
Subject: Re: [RFC PATCH v2 7/9] arm64: allocate sys_membarrier system call
 number

----- On Sep 16, 2015, at 12:35 PM, Will Deacon will.deacon@....com wrote:

> Hi Mathieu,
> 
> On Wed, Sep 16, 2015 at 04:18:39PM +0100, Mathieu Desnoyers wrote:
>> ----- On Sep 7, 2015, at 12:15 PM, Mathieu Desnoyers
>> mathieu.desnoyers@...icios.com wrote:
>> 
>> > arm64 sys_membarrier number is already wired for arm64 through
>> > asm-generic/unistd.h, but needs to be allocated separately for
>> > the 32-bit compability layer of arm64.
>> > 
>> > [ Untested on this architecture. To try it out: fetch linux-next/akpm,
>> >  apply this patch, build/run a membarrier-enabled kernel, and do make
>> >  kselftest. ]
>> 
>> sys_membarrier has been merged into Linux 4.3-rc1. sys_membarrier can therefore
>> be tested on top of Linus' master.
> 
> Just to say that I'm happy to merge this once arch/arm/ also has the
> syscall wired up. It'd be a bit weird to have the support in the arm64
> compat layer but not the arch/arm/ native kernel!

Sounds good! We're currently testing sys_membarrier on a wandboard. We'll
provide feedback by replying to the ARM patch thread soon.

Thanks,

Mathieu

-- 
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com
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