linux-kernel - Re: [PATCH v2] scripts/syscalls: add system call table file for asm-generic

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Message-ID: <CAK8P3a2CqpjG4b9WNYwi5-B8=RHN+edji0p5_Y3Ln-oH_B-Auw@mail.gmail.com>
Date:   Wed, 9 Jan 2019 11:10:42 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     Firoz Khan <firoz.khan@...aro.org>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Philippe Ombredanne <pombredanne@...b.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Kate Stewart <kstewart@...uxfoundation.org>,
        y2038 Mailman List <y2038@...ts.linaro.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-arch <linux-arch@...r.kernel.org>,
        Deepa Dinamani <deepa.kernel@...il.com>,
        Marcin Juszkiewicz <marcin.juszkiewicz@...aro.org>
Subject: Re: [PATCH v2] scripts/syscalls: add system call table file for asm-generic

On Mon, Jan 7, 2019 at 3:31 PM Firoz Khan <firoz.khan@...aro.org> wrote:

> +242    common  accept4                         sys_accept4
> +243    common  recvmmsg                        sys_recvmmsg                    compat_sys_recvmmsg
> +244    archs0  arch_specific_syscall0          sys_arch_specific_syscall0
> +245    archs1  arch_specific_syscall1          sys_arch_specific_syscall1
> +246    archs2  arch_specific_syscall2          sys_arch_specific_syscall2
> +247    archs3  arch_specific_syscall3          sys_arch_specific_syscall3
> +248    archs4  arch_specific_syscall4          sys_arch_specific_syscall4
> +260    common  wait4                           sys_wait4                       compat_sys_wait4

This arch_specific_syscall0 should be fine as well, but there is a small
chance that existing user space code refers to the __NR_arch_specific_syscall
(without trailing 0) macro, so please change 244 back to
'arch_specific_syscall'.

Not sure if we should then count from 0 or 1, i.e. whether 245 should be
arch_specific_syscall1 or arch_specific_syscall2.

      Arnd