linux-kernel - Re: [PATCH v2 06/25] mm: Allow hpages to be arbitrary order

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Message-ID: <20200213141107.ftfnenli72eburei@box>
Date:   Thu, 13 Feb 2020 17:11:07 +0300
From:   "Kirill A. Shutemov" <kirill@...temov.name>
To:     Matthew Wilcox <willy@...radead.org>
Cc:     linux-fsdevel@...r.kernel.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 06/25] mm: Allow hpages to be arbitrary order

On Tue, Feb 11, 2020 at 08:18:26PM -0800, Matthew Wilcox wrote:
> From: "Matthew Wilcox (Oracle)" <willy@...radead.org>
> 
> Remove the assumption in hpage_nr_pages() that compound pages are
> necessarily PMD sized.  The return type needs to be signed as we need
> to use the negative value, eg when calling update_lru_size().

But should it be long?
Any reason to use macros instead of inline function?

-- 
 Kirill A. Shutemov