linux-kernel - Re: [PATCH] pcmcia: ppc64 needs 64-bit ioaddr

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Date:	Sun, 13 May 2007 23:46:08 +0200
From:	Christoph Hellwig <hch@....de>
To:	Olof Johansson <olof@...om.net>
Cc:	paulus@...ba.org, linuxppc-dev@...abs.org,
	linux-pcmcia@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] pcmcia: ppc64 needs 64-bit ioaddr_t

On Sat, May 12, 2007 at 09:31:05AM -0500, Olof Johansson wrote:
> ppc64 really needs ioaddr_t to be 64-bit, since I/O addresses really
> are MMIO addresses, and remapped to a high range.
> 
> While the type is exported to userspace, there hasn't been any platforms
> with PCMCIA on 64-bit powerpc until now, so changing it won't regress
> any existing users.

In fact the only use of the type should be in the obsolete ioctl-based user
interface.  So instead of changing the size of the type you should

 a) make sure you're not using cardmgr
 b) fix up those places that still use ioaddr_t where they shouldn't
    and switch the to kio_addr_t (why not just unsigned long like all
    other busses?) 

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