linux-kernel - Re: [PATCH v2 14/29] arch: add pkey and rseq syscall numbers everywhere

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Message-ID: <CAMuHMdWaJyNqUeq4qu3AgU0fYrQdZ_zbo0DFFiM97Y5HESYYnA@mail.gmail.com>
Date:   Mon, 21 Jan 2019 09:55:48 +0100
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     y2038 Mailman List <y2038@...ts.linaro.org>,
        Linux API <linux-api@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
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        Matt Turner <mattst88@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
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        "the arch/x86 maintainers" <x86@...nel.org>,
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Subject: Re: [PATCH v2 14/29] arch: add pkey and rseq syscall numbers everywhere

On Fri, Jan 18, 2019 at 5:20 PM Arnd Bergmann <arnd@...db.de> wrote:
> Most architectures define system call numbers for the rseq and pkey system
> calls, even when they don't support the features, and perhaps never will.
>
> Only a few architectures are missing these, so just define them anyway
> for consistency. If we decide to add them later to one of these, the
> system call numbers won't get out of sync then.
>
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

>  arch/m68k/kernel/syscalls/syscall.tbl   | 4 ++++

> --- a/arch/m68k/kernel/syscalls/syscall.tbl
> +++ b/arch/m68k/kernel/syscalls/syscall.tbl
> @@ -388,6 +388,10 @@
>  378    common  pwritev2                        sys_pwritev2
>  379    common  statx                           sys_statx
>  380    common  seccomp                         sys_seccomp
> +381    common  pkey_alloc                      sys_pkey_alloc
> +382    common  pkey_free                       sys_pkey_free
> +383    common  pkey_mprotect                   sys_pkey_mprotect
> +384    common  rseq                            sys_rseq

Note that all architectures that already define pkey syscalls, list
pkey_mprotect
first.

Regardless, for m68k:
Acked-by: Geert Uytterhoeven <geert@...ux-m68k.org>

>  # room for arch specific calls
>  393    common  semget                          sys_semget
>  394    common  semctl                          sys_semctl

Gr{oetje,eeting}s,

                        Geert


--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds