linux-kernel - Re: [PATCH 2/2] arch: add pidfd and io

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Message-ID: <87y34vl6ji.fsf@concordia.ellerman.id.au>
Date:   Sun, 31 Mar 2019 20:47:13 +1100
From:   Michael Ellerman <mpe@...erman.id.au>
To:     Arnd Bergmann <arnd@...db.de>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     Richard Henderson <rth@...ddle.net>,
        Ivan Kokshaysky <ink@...assic.park.msu.ru>,
        Matt Turner <mattst88@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Tony Luck <tony.luck@...el.com>,
        Fenghua Yu <fenghua.yu@...el.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Michal Simek <monstr@...str.eu>,
        Ralf Baechle <ralf@...ux-mips.org>,
        Paul Burton <paul.burton@...s.com>,
        James Hogan <jhogan@...nel.org>,
        "James E . J . Bottomley" <James.Bottomley@...senPartnership.com>,
        Helge Deller <deller@....de>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Martin Schwidefsky <schwidefsky@...ibm.com>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        Rich Felker <dalias@...c.org>,
        "David S . Miller" <davem@...emloft.net>,
        Max Filippov <jcmvbkbc@...il.com>,
        Firoz Khan <firoz.khan@...aro.org>,
        linux-alpha@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-ia64@...r.kernel.org,
        linux-m68k@...ts.linux-m68k.org, linux-mips@...r.kernel.org,
        linux-parisc@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        linux-s390@...r.kernel.org, linux-sh@...r.kernel.org,
        sparclinux@...r.kernel.org, Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH 2/2] arch: add pidfd and io_uring syscalls everywhere

Arnd Bergmann <arnd@...db.de> writes:
> Add the io_uring and pidfd_send_signal system calls to all architectures.
>
> These system calls are designed to handle both native and compat tasks,
> so all entries are the same across architectures, only arm-compat and
> the generic tale still use an old format.
>
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
>  arch/alpha/kernel/syscalls/syscall.tbl      | 4 ++++
>  arch/arm/tools/syscall.tbl                  | 4 ++++
>  arch/arm64/include/asm/unistd.h             | 2 +-
>  arch/arm64/include/asm/unistd32.h           | 8 ++++++++
>  arch/ia64/kernel/syscalls/syscall.tbl       | 4 ++++
>  arch/m68k/kernel/syscalls/syscall.tbl       | 4 ++++
>  arch/microblaze/kernel/syscalls/syscall.tbl | 4 ++++
>  arch/mips/kernel/syscalls/syscall_n32.tbl   | 4 ++++
>  arch/mips/kernel/syscalls/syscall_n64.tbl   | 4 ++++
>  arch/mips/kernel/syscalls/syscall_o32.tbl   | 4 ++++
>  arch/parisc/kernel/syscalls/syscall.tbl     | 4 ++++
>  arch/powerpc/kernel/syscalls/syscall.tbl    | 4 ++++

Have you done any testing?

I'd rather not wire up syscalls that have never been tested at all on
powerpc.

cheers