From mboxrd@z Thu Jan 1 00:00:00 1970 From: Will Deacon Subject: Re: [RFC PATCH v2 7/9] arm64: allocate sys_membarrier system call number Date: Wed, 16 Sep 2015 17:39:45 +0100 Message-ID: <20150916163945.GQ28771@arm.com> References: <1441642556-30972-1-git-send-email-mathieu.desnoyers@efficios.com> <1441642556-30972-8-git-send-email-mathieu.desnoyers@efficios.com> <4692929.9334.1442416719904.JavaMail.zimbra@efficios.com> <20150916163527.GO28771@arm.com> <2075941251.9404.1442421484155.JavaMail.zimbra@efficios.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <2075941251.9404.1442421484155.JavaMail.zimbra-vg+e7yoeK/dWk0Htik3J/w@public.gmane.org> Sender: linux-api-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Mathieu Desnoyers Cc: Catalin Marinas , "linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" , Andrew Morton , linux-api List-Id: linux-api@vger.kernel.org On Wed, Sep 16, 2015 at 05:38:04PM +0100, Mathieu Desnoyers wrote: > ----- On Sep 16, 2015, at 12:35 PM, Will Deacon will.deacon-5wv7dgnIgG8@public.gmane.org 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-vg+e7yoeK/dWk0Htik3J/w@public.gmane.org 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. Ok. I was about to kick the selftest on my Juno board (arm64). Will