linux-kernel - Re: [PATCH 5/5] proc: export more page flags in /proc/kpageflags

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Message-Id: <20090428215050.67b7b4db.akpm@linux-foundation.org>
Date:	Tue, 28 Apr 2009 21:50:50 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Nathan Lynch <ntl@...ox.com>
Cc:	Wu Fengguang <fengguang.wu@...el.com>,
	"linux-kernel\@vger.kernel.org" <linux-kernel@...r.kernel.org>,
	"kosaki.motohiro\@jp.fujitsu.com" <kosaki.motohiro@...fujitsu.com>,
	"andi\@firstfloor.org" <andi@...stfloor.org>,
	"mpm\@selenic.com" <mpm@...enic.com>,
	"adobriyan\@gmail.com" <adobriyan@...il.com>,
	"linux-mm\@kvack.org" <linux-mm@...ck.org>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	Chandra Seetharaman <sekharan@...ibm.com>,
	Olof Johansson <olof@...om.net>,
	Helge Deller <deller@...isc-linux.org>, linuxppc-dev@...abs.org
Subject: Re: [PATCH 5/5] proc: export more page flags in /proc/kpageflags

On Tue, 28 Apr 2009 23:41:52 -0500 Nathan Lynch <ntl@...ox.com> wrote:

> > CONFIG_DEBUG_KERNEL being enabled in distro kernels effectively means 
> >
> >         #ifdef CONFIG_DEBUG_KERNEL == #if 1
> >
> > as the following patch demos. Now it becomes obviously silly.
> 
> Sure, #if 1 is usually silly.  But if the point is that DEBUG_KERNEL is
> not supposed to directly affect code generation, then I see two options
> for powerpc:
> 
> - remove the #ifdef CONFIG_DEBUG_KERNEL guards from
>   arch/powerpc/kernel/sysfs.c, unconditionally enabling the hid/ima
>   sysfs attributes, or
> 
> - define a new config symbol which governs whether those attributes are
>   enabled, and make it depend on DEBUG_KERNEL

yup.
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