Re: [07/36] Use page_cache_xxx in mm/filemap_xip.c

[Nick Piggin <nickpiggin@yahoo.com.au>]

Christoph Hellwig wrote:
> On Tue, Aug 28, 2007 at 09:49:38PM +0200, J??rn Engel wrote:
>
> > On Tue, 28 August 2007 12:05:58 -0700, clameter@sgi.com wrote:
> >
> > > -	index = *ppos >> PAGE_CACHE_SHIFT;
> > > -	offset = *ppos & ~PAGE_CACHE_MASK;
> > > +	index = page_cache_index(mapping, *ppos);
> > > +	offset = page_cache_offset(mapping, *ppos);
> >
> > Part of me feels inclined to marge this patch now because it makes the
> > code more readable, even if page_cache_index() is implemented as
> > #define page_cache_index(mapping, pos) ((pos) >> PAGE_CACHE_SHIFT)
> >
> > I know there is little use in yet another global search'n'replace
> > wankfest and Andrew might wash my mouth just for mentioning it.  Still,
> > hard to dislike this part of your patch.
>
>
> Yes, I I suggested that before.  Andrew seems to somehow hate this
> patchset, but even if we don;'t get it in the lowercase macros are much
> much better then the current PAGE_CACHE_* confusion.

I don't mind the change either. The open coded macros are very
recognisable, but it isn't hard to have a typo and get one
slightly wrong.

If it goes upstream now it wouldn't have the mapping argument
though, would it? Or the need to replace PAGE_CACHE_SIZE I guess.

--
SUSE Labs, Novell Inc.
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