linux-kernel - Re: [PATCH] kdump, oldmem: support mmap on /dev/oldmem

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Date:	Mon, 11 Feb 2013 15:44:14 -0500
From:	Vivek Goyal <vgoyal@...hat.com>
To:	"Hatayama, Daisuke" <d.hatayama@...fujitsu.com>
Cc:	"kexec@...ts.infradead.org" <kexec@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"lisa.mitchell@...com" <lisa.mitchell@...com>,
	"kumagai-atsushi@....nes.nec.co.jp" 
	<kumagai-atsushi@....nes.nec.co.jp>,
	"ebiederm@...ssion.com" <ebiederm@...ssion.com>,
	"cpw@....com" <cpw@....com>
Subject: Re: [PATCH] kdump, oldmem: support mmap on /dev/oldmem

On Fri, Feb 08, 2013 at 12:33:49AM +0000, Hatayama, Daisuke wrote:

[..]
> Also, remap_pfn_range is the function exported into kernel modules, so changing the third argument means changing ABI. Introducing a kind of remap_pfn_range_64 is a good idea? if there's someone needing the feature on 32-bit kernel.

I thought kernel does not care about compatibility with out of tree
modules and any user of in-tree module is updated to use new API. I could
be wrong though...

Thanks
Vivek
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