From mboxrd@z Thu Jan 1 00:00:00 1970 From: Will Deacon Subject: Re: [RFC PATCH 3/9] arm64: allocate sys_membarrier system call number Date: Wed, 2 Sep 2015 11:10:50 +0100 Message-ID: <20150902101049.GE25720@arm.com> References: <1440698215-8355-1-git-send-email-mathieu.desnoyers@efficios.com> <1440698215-8355-4-git-send-email-mathieu.desnoyers@efficios.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <1440698215-8355-4-git-send-email-mathieu.desnoyers-vg+e7yoeK/dWk0Htik3J/w@public.gmane.org> Sender: linux-api-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Mathieu Desnoyers Cc: Andrew Morton , "linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" , "linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" , Catalin Marinas List-Id: linux-api@vger.kernel.org On Thu, Aug 27, 2015 at 06:56:49PM +0100, Mathieu Desnoyers 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. ] > > Signed-off-by: Mathieu Desnoyers > CC: Andrew Morton > CC: linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org > CC: Catalin Marinas > CC: Will Deacon > --- > arch/arm64/include/asm/unistd32.h | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/arch/arm64/include/asm/unistd32.h b/arch/arm64/include/asm/unistd32.h > index cef934a..d97be80 100644 > --- a/arch/arm64/include/asm/unistd32.h > +++ b/arch/arm64/include/asm/unistd32.h > @@ -797,3 +797,5 @@ __SYSCALL(__NR_memfd_create, sys_memfd_create) > __SYSCALL(__NR_bpf, sys_bpf) > #define __NR_execveat 387 > __SYSCALL(__NR_execveat, compat_sys_execveat) > +#define __NR_membarrier 388 > +__SYSCALL(__NR_membarrier, sys_membarrier) I think people have made similar comments for other architectures, but please also updated __NR_compat_syscalls when adding new compat syscalls here. Will