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Date: Wed, 16 Oct 2002 09:19:10 -0700
From: Andrew Morton <akpm@digeo.com>
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To: David Howells <dhowells@redhat.com>
CC: riel@surriel.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] do_generic_file_read / readahead adjustments
References: <30738.1034782153@warthog.cambridge.redhat.com>
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David Howells wrote:
> 
> The attached patch does the following three things:
> 
>  (1) Makes the functions in mm/readahead.c only use struct file* to pass to
>      readpage(). address_mapping* and file_ra_state* are used instead to keep
>      track of readahead stuff.
> 
>  (2) Adds a new function do_generic_mapping_read() that is similar to
>      do_generic_file_read(), except that it uses a mapping pointer and a
>      readahead state pointer to access a file. The file* is only used to pass
>      to readpage().
> 
>  (3) Turns do_generic_file_read() into an inline function in linux/fs.h that
>      simply wraps do_generic_mapping_read().
> 

Seems sensible.  Is there something out there which actually uses this?
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