linux-kernel - Re: [PATCH] [13/31] CPA: Use macros to modify the PG_arch_1 page flags in change_page

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Date:	Tue, 15 Jan 2008 11:25:22 +0100
From:	Andi Kleen <ak@...e.de>
To:	Harvey Harrison <harvey.harrison@...il.com>
Cc:	linux-kernel@...r.kernel.org, jbeulich@...ell.com, mingo@...e.hu,
	tglx@...utronix.de
Subject: Re: [PATCH] [13/31] CPA: Use macros to modify the PG_arch_1 page flags in change_page_attr

On Tuesday 15 January 2008 11:15:02 Harvey Harrison wrote:
> On Tue, 2008-01-15 at 11:06 +0100, Andi Kleen wrote:
> > On Tuesday 15 January 2008 10:29:51 Harvey Harrison wrote:
> > > On Mon, 2008-01-14 at 23:16 +0100, Andi Kleen wrote:
> > > > Instead of open coding the bit accesses uses standard style
> > > > *PageDeferred* macros. 
> > > > 
> > > 
> > > Any reason these couldn't be static inlines in a shared header?
> > 
> > The whole usage of that bit is private to the file
> 
> True if pageattr_32|64.c get merged, not one I have looked at yet,
> but wouldn't a static inline in the files then be better for the
> typechecking?

If you pass in something other than a struct page * the compiler
will already complain. Also all the other Page* accessor in page-flags.h are macros.

-Andi
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