linux-kernel - Re: PAGE_SIZE Availability Inconsistency

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Date:	Thu, 8 Mar 2007 13:03:48 -0800
From:	"David Brown" <dmlb2000@...il.com>
To:	"Anton Blanchard" <anton@...ba.org>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	"Christoph Hellwig" <hch@...radead.org>,
	"Arjan van de Ven" <arjan@...radead.org>,
	"Roman Zippel" <zippel@...ux-m68k.org>,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
	gdb@...rceware.org
Subject: Re: PAGE_SIZE Availability Inconsistency

On 3/8/07, Anton Blanchard <anton@...ba.org> wrote:
>
> > By the way, it's a massive snafu that the swap area magic number is
> > dependent on PAGE_SIZE.  There is absolutely no good reason for that.
>
> Agreed, its been a big problem booting between 4kB and 64kB kernels on
> ppc64.

Okay this really seems like a couple of things need to happen, first
change swap dependency on PAGE_SIZE, then move the __KERNEL__ define
above the PAGE_SIZE and friends defines in the appropriate
asm-*/page.h files.

Do these tasks need to happen in this order? I haven't really looked
at the swap code at all...

Also, I'd be willing to help I've done kernel coding for experimental
projects and such but nothing for kernel.org so I might need some
shepherding.

- David Brown
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