linux-kernel - Re: [RFC PATCH v2 7/9] arm64: allocate sys

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Message-ID: <4692929.9334.1442416719904.JavaMail.zimbra@efficios.com>
Date:	Wed, 16 Sep 2015 15:18:39 +0000 (UTC)
From:	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
To:	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>
Cc:	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-api <linux-api@...r.kernel.org>
Subject: Re: [RFC PATCH v2 7/9] arm64: allocate sys_membarrier system call
 number

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

Hi,

sys_membarrier has been merged into Linux 4.3-rc1. sys_membarrier can therefore
be tested on top of Linus' master.

Thanks,

Mathieu

> 
> Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
> CC: Andrew Morton <akpm@...ux-foundation.org>
> CC: linux-api@...r.kernel.org
> CC: Catalin Marinas <catalin.marinas@....com>
> CC: Will Deacon <will.deacon@....com>
> ---
> arch/arm64/include/asm/unistd.h   | 2 +-
> arch/arm64/include/asm/unistd32.h | 2 ++
> 2 files changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/include/asm/unistd.h b/arch/arm64/include/asm/unistd.h
> index 3bc498c..e70f7e7 100644
> --- a/arch/arm64/include/asm/unistd.h
> +++ b/arch/arm64/include/asm/unistd.h
> @@ -44,7 +44,7 @@
> #define __ARM_NR_compat_cacheflush	(__ARM_NR_COMPAT_BASE+2)
> #define __ARM_NR_compat_set_tls		(__ARM_NR_COMPAT_BASE+5)
> 
> -#define __NR_compat_syscalls		388
> +#define __NR_compat_syscalls		389
> #endif
> 
> #define __ARCH_WANT_SYS_CLONE
> 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)
> --
> 1.9.1

-- 
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com
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