linux-kernel - Re: sys_kcmp (was: Re: [PATCH 1/2] ARM: add finit

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Message-ID: <20120922133847.GC20003@linux-mips.org>
Date:	Sat, 22 Sep 2012 15:38:47 +0200
From:	Ralf Baechle <ralf@...ux-mips.org>
To:	Cyrill Gorcunov <gorcunov@...nvz.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Kees Cook <keescook@...omium.org>,
	linux-kernel@...r.kernel.org,
	Linux-Arch <linux-arch@...r.kernel.org>,
	Heiko Carstens <heiko.carstens@...ibm.com>
Subject: Re: sys_kcmp (was: Re: [PATCH 1/2] ARM: add finit_module syscall to
 ARM)

On Sat, Sep 22, 2012 at 02:20:46PM +0100, Russell King wrote:

> 2. There allegedly exists a patch to remove x86isms from sys_kcmp -
>    allegedly also in akpm's tree.  However, I've looked through the code in
>    mainline, and nothing stands out.  Ralf Beachle also said yesterday that
>    he has looked through from the MIPS PoV and also can't see any x86isms,
>    so we're both thinking that it should merely have the x86 dependency
>    removed.
> 
> 3. Until the x86 dependency is gone (that depends on what akpm proposes to
>    do with the patches he's allegedly sitting on), non-x86 arches can only
>    reserve the syscall, and add an IGNORE for it.

There is a weak definition provided in kernel/sys_ni.c so it actually can
be properly wired up in preparation for the day when the dependency in
Kconfig gets fixed.

> It would be good to at least get checksyscalls.sh fixed so arch maintainers
> get their warnings for new syscalls back.

Indeed.  That script has become just too important.

  Ralf
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