Re: [RFC PATCH 1/9] powerpc: allocate sys_membarrier system call number

From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
To: Michael Ellerman <mpe@ellerman.id.au>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	linux-api <linux-api@vger.kernel.org>,
	linux-kernel@vger.kernel.org,
	Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Paul Mackerras <paulus@samba.org>,
	linuxppc-dev@lists.ozlabs.org
Subject: Re: [RFC PATCH 1/9] powerpc: allocate sys_membarrier system call number
Date: Mon, 31 Aug 2015 15:32:54 +0000 (UTC)	[thread overview]
Message-ID: <131898944.32688.1441035174419.JavaMail.zimbra@efficios.com> (raw)
In-Reply-To: <1441004045.5735.8.camel@ellerman.id.au>

----- On Aug 31, 2015, at 2:54 AM, Michael Ellerman mpe@ellerman.id.au wrote:

> On Thu, 2015-08-27 at 13:56 -0400, Mathieu Desnoyers wrote:
>> Allow it to be used from SPU, since it should not have unwanted
>> side-effects.
>> 
>> [ 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. ]
>> 
>> Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
>> CC: Andrew Morton <akpm@linux-foundation.org>
>> CC: linux-api@vger.kernel.org
>> CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>
>> CC: Paul Mackerras <paulus@samba.org>
>> CC: Michael Ellerman <mpe@ellerman.id.au>
>> CC: linuxppc-dev@lists.ozlabs.org
> 
> Thanks.
> 
> I get:
> 
> $ ./membarrier_test
> membarrier MEMBARRIER_CMD_QUERY syscall available.
> membarrier: MEMBARRIER_CMD_SHARED success.
> membarrier: tests done!
> 
> Which looks good.
> 
> Assuming the membarrier support hits 4.3, I'll take this via my tree for 4.3
> also.

Great! I'll take care of your comments about self-tests,

Thanks,

Mathieu

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