From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Tue, 3 Nov 2020 08:36:28 +0000
From: Christoph Hellwig <hch@infradead.org>
Subject: Re: [PATCH v2 2/4] mm: simplify compat_sys_move_pages
Message-ID: <20201103083628.GC9092@infradead.org>
References: <20201102123151.2860165-1-arnd@kernel.org>
 <20201102123151.2860165-3-arnd@kernel.org>
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To: Arnd Bergmann <arnd@kernel.org>
Cc: linux-arch@vger.kernel.org, Thomas Gleixner <tglx@linutronix.de>, Arnd Bergmann <arnd@arndb.de>, Brian Gerst <brgerst@gmail.com>, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, Christoph Hellwig <hch@infradead.org>, linux-mm@kvack.org, Borislav Petkov <bp@alien8.de>, Alexander Viro <viro@zeniv.linux.org.uk>, Andy Lutomirski <luto@kernel.org>, "H . Peter Anvin" <hpa@zytor.com>, Andrew Morton <akpm@linux-foundation.org>, Ingo Molnar <mingo@kernel.org>, linux-arm-kernel@lists.infradead.org, Eric Biederman <ebiederm@xmission.com>

>  #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.

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