linux-kernel - Re: [PATCH v2 41/46] mm/page_alloc: Add folio allocation functions

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Date:   Fri, 25 Jun 2021 02:06:13 +0100
From:   Matthew Wilcox <willy@...radead.org>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     akpm@...ux-foundation.org, linux-fsdevel@...r.kernel.org,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 41/46] mm/page_alloc: Add folio allocation functions

On Wed, Jun 23, 2021 at 11:58:02AM +0200, Christoph Hellwig wrote:
> On Tue, Jun 22, 2021 at 01:15:46PM +0100, Matthew Wilcox (Oracle) wrote:
> > +static inline
> > +struct folio *__alloc_folio_node(gfp_t gfp, unsigned int order, int nid)
> 
> Weirdo prototype formatting.
> 
> Otherwise looks good (assuming we grow callers):

The next patch adds filemap_alloc_folio() which uses these.  That then
gets used in "mm/filemap: Add filemap_get_folio", which is the patch
after that.

Now that I look at this patch again, I wonder if this shouldn't be
folio_alloc(), __folio_alloc() and __folio_alloc_node.  And even though
I have no users yet, completing the set with folio_alloc_node() might
be a good idea.

> Reviewed-by: Christoph Hellwig <hch@....de>