linux-kernel - Re: [PATCH 01/13] syscalls: compat: Fix the missing part for __SYSCALL

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Date:   Thu, 23 Dec 2021 22:52:17 -0800
From:   Christoph Hellwig <hch@...radead.org>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Guo Ren <guoren@...nel.org>, Palmer Dabbelt <palmer@...belt.com>,
        Anup Patel <anup.patel@....com>,
        gregkh <gregkh@...uxfoundation.org>,
        liush <liush@...winnertech.com>, wefu@...hat.com,
        Drew Fustini <drew@...gleboard.org>, wangjunqiang@...as.ac.cn,
        Wei Wu (吴伟) <lazyparser@...il.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-riscv <linux-riscv@...ts.infradead.org>,
        linux-csky@...r.kernel.org, Guo Ren <guoren@...ux.alibaba.com>
Subject: Re: [PATCH 01/13] syscalls: compat: Fix the missing part for
 __SYSCALL_COMPAT

On Tue, Dec 21, 2021 at 06:08:45PM +0100, Arnd Bergmann wrote:
> > -__SYSCALL(__NR_ptrace, sys_ptrace)
> > +__SC_COMP(__NR_ptrace, sys_ptrace, compat_sys_ptrace)
> >
> 
> Right. We could merge sys_ptrace and compat_sys_ptrace() by adding
> a in_compat_syscall() check, but either way works.

I think merging them would be very useful, including merging
compat_arch_ptrace into arch_ptrace.  But we can leave that for
later.