Re: [RFC PATCH v2 7/9] arm64: allocate sys_membarrier system call number

[Mathieu Desnoyers]

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