On Wed, Sep 16, 2015 at 06:27:10PM +0000, Mathieu Desnoyers wrote:

----- On Sep 7, 2015, at 12:15 PM, Mathieu Desnoyers mathieu.desnoyers-vg+e7yoeK/dWk0Htik3J/w@public.gmane.org wrote:

quoted

[ 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. ]

Hi,

We tested the system call on our ARM board (Wandboard, SoC
Freescale i.MX6 Quad) by applying this patch on top of
Linux 4.3-rc1. Both the membarrier kselftest and
Userspace RCU regression tests (the latter manually wired up
on sys_membarrier) work fine.

Tested-by: Mathieu Desnoyers <mathieu.desnoyers-vg+e7yoeK/dWk0Htik3J/w@public.gmane.org>

sys_membarrier has been pulled into Linux 4.3-rc1. Please
feel free to wire it up on ARM.

Well, it's not going to end up with 388, but 389, because we also have
userfaultfd added in the same merge window, and I follow the x86
syscall ordering when adding to ARM.

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