linux-kernel - Re: [PATCH v2 2/4] mm: simplify compat_sys_move

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Message-ID: <20201103083628.GC9092@infradead.org>
Date:   Tue, 3 Nov 2020 08:36:28 +0000
From:   Christoph Hellwig <hch@...radead.org>
To:     Arnd Bergmann <arnd@...nel.org>
Cc:     linux-arch@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Andy Lutomirski <luto@...nel.org>,
        Borislav Petkov <bp@...en8.de>,
        Brian Gerst <brgerst@...il.com>,
        Christoph Hellwig <hch@...radead.org>,
        Eric Biederman <ebiederm@...ssion.com>,
        Ingo Molnar <mingo@...nel.org>,
        "H . Peter Anvin" <hpa@...or.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, kexec@...ts.infradead.org
Subject: Re: [PATCH v2 2/4] mm: simplify compat_sys_move_pages

>  #ifdef CONFIG_COMPAT
>  COMPAT_SYSCALL_DEFINE6(move_pages, pid_t, pid, compat_ulong_t, nr_pages,
> +		       compat_uptr_t __user *, pages,
>  		       const int __user *, nodes,
>  		       int __user *, status,
>  		       int, flags)
>  {
> +	return kernel_move_pages(pid, nr_pages,
> +				 (const void __user *__user *)pages,
> +				 nodes, status, flags);
>  }

Same as for kexec - all the compat syscall tables can just point to
the native version now.