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SubjectRe: [RFC PATCH v2 7/9] arm64: allocate sys_membarrier system call number
----- On Sep 7, 2015, at 12:15 PM, Mathieu Desnoyers mathieu.desnoyers@efficios.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@efficios.com>
> CC: Andrew Morton <akpm@linux-foundation.org>
> CC: linux-api@vger.kernel.org
> CC: Catalin Marinas <catalin.marinas@arm.com>
> CC: Will Deacon <will.deacon@arm.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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