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From: Will Deacon <will.deacon@arm.com>
To: Arnd Bergmann <arnd@arndb.de>
Cc: y2038@lists.linaro.org, linux-api@vger.kernel.org,
	linux-kernel@vger.kernel.org, ink@jurassic.park.msu.ru,
	mattst88@gmail.com, linux@armlinux.org.uk,
	catalin.marinas@arm.com, tony.luck@intel.com,
	fenghua.yu@intel.com, geert@linux-m68k.org, monstr@monstr.eu,
	paul.burton@mips.com, deller@gmx.de, mpe@ellerman.id.au,
	schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com,
	dalias@libc.org, davem@davemloft.net, luto@kernel.org,
	tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com,
	x86@kernel.org, jcmvbkbc@gmail.com, firoz.khan@linaro.org,
	ebiederm@xmission.com, deepa.kernel@gmail.com,
	linux@dominikbrodowski.net, akpm@linux-foundation.org,
	dave@stgolabs.net, linux-alpha@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org, linux-ia64@vger.kernel.org,
	linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org,
	linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
	linux-s390@vger.kernel.org, linux-sh@vger.kernel.org,
	sparclinux@vger.kernel.org
Subject: Re: [PATCH 06/15] ARM: add migrate_pages() system call
Date: Thu, 10 Jan 2019 16:32:20 +0000	[thread overview]
Message-ID: <20190110163220.GB31683@fuggles.cambridge.arm.com> (raw)
In-Reply-To: <20190110162435.309262-7-arnd@arndb.de>

On Thu, Jan 10, 2019 at 05:24:26PM +0100, Arnd Bergmann wrote:
> The migrate_pages system call has an assigned number on all architectures
> except ARM. When it got added initially in commit d80ade7b3231 ("ARM:
> Fix warning: #warning syscall migrate_pages not implemented"), it was
> intentionally left out based on the observation that there are no 32-bit
> ARM NUMA systems.
> 
> However, there are now arm64 NUMA machines that can in theory run 32-bit
> kernels (actually enabling NUMA there would require additional work)
> as well as 32-bit user space on 64-bit kernels, so that argument is no
> longer very strong.
> 
> Assigning the number lets us use the system call on 64-bit kernels as well
> as providing a more consistent set of syscalls across architectures.
> 
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---
>  arch/arm/include/asm/unistd.h     | 1 -
>  arch/arm/tools/syscall.tbl        | 1 +
>  arch/arm64/include/asm/unistd.h   | 2 +-
>  arch/arm64/include/asm/unistd32.h | 2 ++
>  4 files changed, 4 insertions(+), 2 deletions(-)

[...]

> diff --git a/arch/arm64/include/asm/unistd32.h b/arch/arm64/include/asm/unistd32.h
> index 04ee190b90fe..355fe2bc035b 100644
> --- a/arch/arm64/include/asm/unistd32.h
> +++ b/arch/arm64/include/asm/unistd32.h
> @@ -821,6 +821,8 @@ __SYSCALL(__NR_statx, sys_statx)
>  __SYSCALL(__NR_rseq, sys_rseq)
>  #define __NR_io_pgetevents 399
>  __SYSCALL(__NR_io_pgetevents, compat_sys_io_pgetevents)
> +#define __NR_migrate_pages 400
> +__SYSCALL(__NR_migrate_pages, sys_migrate_pages)

Should be compat_sys_migrate_pages instead?

Will

  reply	other threads:[~2019-01-10 16:32 UTC|newest]

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-10 16:24 [PATCH 00/15] arch: synchronize syscall tables in preparation for y2038 Arnd Bergmann
2019-01-10 16:24 ` [PATCH 01/15] ia64: add __NR_umount2 definition Arnd Bergmann
2019-01-10 16:24 ` [PATCH 02/15] ia64: add statx and io_pgetevents syscalls Arnd Bergmann
2019-01-10 16:24 ` [PATCH 03/15] ia64: assign syscall numbers for perf and seccomp Arnd Bergmann
2019-01-10 16:24 ` [PATCH 04/15] alpha: wire up io_pgetevents system call Arnd Bergmann
2019-01-10 16:24 ` [PATCH 05/15] alpha: update syscall macro definitions Arnd Bergmann
2019-01-10 16:24 ` [PATCH 06/15] ARM: add migrate_pages() system call Arnd Bergmann
2019-01-10 16:32   ` Will Deacon [this message]
2019-01-10 17:11     ` Arnd Bergmann
2019-01-10 16:24 ` [PATCH 07/15] ARM: add kexec_file_load system call number Arnd Bergmann
2019-01-10 16:39   ` Will Deacon
2019-01-10 17:14     ` Arnd Bergmann
2019-01-10 16:24 ` [PATCH 08/15] m68k: assign syscall number for seccomp Arnd Bergmann
2019-01-10 16:24 ` [PATCH 09/15] sh: remove duplicate unistd_32.h file Arnd Bergmann
2019-01-10 16:24 ` [PATCH 10/15] sh: add statx system call Arnd Bergmann
2019-01-10 16:24 ` [PATCH 11/15] mips: fix n32 compat_ipc_parse_version Arnd Bergmann
2019-01-10 16:24 ` [PATCH 12/15] sparc64: fix sparc_ipc type conversion Arnd Bergmann
2019-01-10 16:24 ` [PATCH 13/15] ipc: rename old-style shmctl/semctl/msgctl syscalls Arnd Bergmann
2019-01-10 16:24 ` [PATCH 14/15] arch: add split IPC system calls where needed Arnd Bergmann
2019-01-10 20:32   ` Heiko Carstens
2019-01-11 17:33     ` Arnd Bergmann
2019-01-14  3:40   ` Michael Ellerman
2019-01-14  3:59   ` Michael Ellerman
2019-01-14  9:58     ` Michael Ellerman
2019-01-15 15:01     ` Arnd Bergmann
2019-01-15 15:18       ` Arnd Bergmann
2019-01-15 16:35         ` Geert Uytterhoeven
2019-01-15 21:24           ` Arnd Bergmann
2019-01-16  0:09         ` Michael Ellerman
2019-01-16  0:10       ` Michael Ellerman
2019-01-10 16:24 ` [PATCH 15/15] arch: add pkey and rseq syscall numbers everywhere Arnd Bergmann
2019-01-10 20:36   ` Heiko Carstens
2019-01-11 17:30     ` Arnd Bergmann
2019-01-14  8:31       ` Heiko Carstens
2019-01-15 11:52   ` Russell King - ARM Linux admin
2019-01-15 14:47     ` Arnd Bergmann
2019-01-10 16:59 ` [PATCH 00/15] arch: synchronize syscall tables in preparation for y2038 Geert Uytterhoeven
2019-01-10 17:06   ` Arnd Bergmann
2019-01-10 18:11     ` Geert Uytterhoeven
2019-01-10 22:43       ` Arnd Bergmann
2019-01-11  8:07         ` Geert Uytterhoeven
2019-01-10 18:10 ` Joseph Myers
2019-01-10 22:42   ` Arnd Bergmann
2019-01-10 23:14     ` Michael Cree

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