linux-kernel - Re: [PATCH v2] mm/swap.c: make functions and their kernel-doc agree

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Message-ID: <20180131075848.GB28275@bombadil.infradead.org>
Date:   Tue, 30 Jan 2018 23:58:48 -0800
From:   Matthew Wilcox <willy@...radead.org>
To:     Michal Hocko <mhocko@...nel.org>
Cc:     Randy Dunlap <rdunlap@...radead.org>,
        Linux MM <linux-mm@...ck.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        LKML <linux-kernel@...r.kernel.org>, Jan Kara <jack@...e.cz>
Subject: Re: [PATCH v2] mm/swap.c: make functions and their kernel-doc agree

On Tue, Jan 30, 2018 at 01:34:00PM +0100, Michal Hocko wrote:
> On Mon 29-01-18 16:43:55, Randy Dunlap wrote:
> > - for function pagevec_lookup_entries(), change the function parameter
> >   name from nr_pages to nr_entries since that is more descriptive of
> >   what the parameter actually is and then it matches the kernel-doc
> >   comments also
> 
> I know what is nr_pages because I do expect pages to be returned. What
> are entries? Can it be something different from pages?

entries are any page cache entries -- pages or exceptional entries.
calling this parameter nr_pages tricks you into thinking that you'll
only get pages back.