linux-kernel - Re: Microblaze noMMU/MMU merge

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Date:	Tue, 21 Apr 2009 21:06:28 +1000
From:	Greg Ungerer <gerg@...pgear.com>
To:	michal.simek@...alogix.com
CC:	Ingo Molnar <mingo@...e.hu>, lkml <linux-arch@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Arnd Bergmann <arnd@...db.de>,
	Linux Kernel list <linux-kernel@...r.kernel.org>
Subject: Re: Microblaze noMMU/MMU merge

Hi Michal,

Michal Simek wrote:
> I would like to say your opinion about putting together Microblaze MMU
> arch to noMMU version.
> 
> In C code will be #ifdef CONFIG_MMU ... #endif  or #ifndef.
> 
> Here is proposal for headers. The similar style is used in m68k but I
> would like to have the same code
> for both archs in main file.
> 
> #ifndef _ASM_MICROBLAZE_PAGE_H
> #define _ASM_MICROBLAZE_PAGE_H
> 
> code for noMMU and MMU which is the same for both.
> 
> #ifdef __uClinux__
> #include "page_no.h" -> noMMU specific
> #else
> #include "page_mm.h"-> MMU specific
> #endif
> #endif /* _ASM_MICROBLAZE_PAGE_H */

Breaking up the files that way is really only temporary. They will
eventually all be merged back to single files (I have probably
reworked about 60% of them so far). There ends up being very little
difference.

I would keep single files if you could.

Regards
Greg


------------------------------------------------------------------------
Greg Ungerer  --  Principal Engineer        EMAIL:     gerg@...pgear.com
SnapGear Group, McAfee                      PHONE:       +61 7 3435 2888
825 Stanley St,                             FAX:         +61 7 3891 3630
Woolloongabba, QLD, 4102, Australia         WEB: http://www.SnapGear.com
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