Date: Fri, 27 Jan 2006 20:16:03 +0000
From: Russell King <rmk+lkml@arm.linux.org.uk>
To: Pierre Ossman <drzeus-list@drzeus.cx>
Cc: LKML <linux-kernel@vger.kernel.org>
Subject: Re: How to map high memory for block io
Message-ID: <20060127201602.GB2767@flint.arm.linux.org.uk>
Mail-Followup-To: Pierre Ossman <drzeus-list@drzeus.cx>,
	LKML <linux-kernel@vger.kernel.org>
References: <43D9C19F.7090707@drzeus.cx> <20060127102611.GC4311@suse.de> <43D9F705.5000403@drzeus.cx> <20060127104321.GE4311@suse.de> <43DA0E97.5030504@drzeus.cx> <20060127194318.GA1433@flint.arm.linux.org.uk> <43DA7EA0.7000504@drzeus.cx>
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On Fri, Jan 27, 2006 at 09:12:16PM +0100, Pierre Ossman wrote:
> Russell King wrote:
> > > I don't see what the problem is.  A sg entry is a list of struct page
> > > pointers, an offset, and a size.  As such, it can't describe a transfer
> > > which crosses a page because such a structure does not imply that one
> > > struct page follows another struct page.
> 
> If the pages do not strictly follow each other then there is a lot of
> broken code in the kernel. drivers/mmc/mmci.c and drivers/block/ub.c
> being two occurences since both assume they can access the entire entry
> through a single mapping.

Why am I getting duplicates of this message?  Please don't forcefully
send me duplicates - it's a waste of my bandwidth.  Thanks.

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:  2.6 Serial core
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