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@arm.com wrote:

Hi Mathieu,

On Wed, Sep 16, 2015 at 04:18:39PM +0100, Mathieu Desnoyers wrote:

quoted

----- On Sep 7, 2015, at 12:15 PM, Mathieu Desnoyers
mathieu.desnoyers@efficios.com wrote:

quoted

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