linux-kernel - Re: [PATCH v17 08/15] seccomp: add system call filtering using BPF

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Message-Id: <20120406140929.538fd5fd.akpm@linux-foundation.org>
Date:	Fri, 6 Apr 2012 14:09:29 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Kees Cook <keescook@...omium.org>, Will Drewry <wad@...omium.org>,
	linux-kernel@...r.kernel.org,
	linux-security-module@...r.kernel.org, linux-arch@...r.kernel.org,
	linux-doc@...r.kernel.org, kernel-hardening@...ts.openwall.com,
	netdev@...r.kernel.org, x86@...nel.org, arnd@...db.de,
	davem@...emloft.net, mingo@...hat.com, oleg@...hat.com,
	peterz@...radead.org, rdunlap@...otime.net, mcgrathr@...omium.org,
	tglx@...utronix.de, luto@....edu, eparis@...hat.com,
	serge.hallyn@...onical.com, djm@...drot.org, scarybeasts@...il.com,
	indan@....nu, pmoore@...hat.com, corbet@....net,
	eric.dumazet@...il.com, markus@...omium.org,
	coreyb@...ux.vnet.ibm.com, jmorris@...ei.org
Subject: Re: [PATCH v17 08/15] seccomp: add system call filtering using BPF

On Fri, 06 Apr 2012 14:06:01 -0700
"H. Peter Anvin" <hpa@...or.com> wrote:

> On 04/06/2012 02:05 PM, Andrew Morton wrote:
> >>>
> >>> hm, I'm surprised that we don't have a zero-returning implementation of
> >>> is_compat_task() when CONFIG_COMPAT=n.  Seems silly.  Blames Arnd.
> >>
> >> There is
> > 
> > I can't find it.  The definition in include/linux/compat.h is inside
> > #ifdef CONFIG_COMPAT.
> > 
> 
> I thought Linus globalized it very recently...

Oh, yeah, I misread.

We should be able to remove quite a few open-coded ifdefs now.
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