linux-kernel - Re: [PATCH] mm/memcontrol.c: use list_{first,next}

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Message-ID: <20151207162102.GC20774@dhcp22.suse.cz>
Date:	Mon, 7 Dec 2015 17:21:03 +0100
From:	Michal Hocko <mhocko@...nel.org>
To:	Geliang Tang <geliangtang@....com>
Cc:	Johannes Weiner <hannes@...xchg.org>, cgroups@...r.kernel.org,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm/memcontrol.c: use list_{first,next}_entry

On Sat 05-12-15 10:55:42, Geliang Tang wrote:
> On Thu, Dec 03, 2015 at 05:27:18PM +0100, Michal Hocko wrote:
> > On Thu 03-12-15 22:16:55, Geliang Tang wrote:
> > > To make the intention clearer, use list_{first,next}_entry instead
> > > of list_entry.
> > 
> > Does this really help readability? This function simply uncharges the
> > given list of pages. Why cannot we simply use list_for_each_entry
> > instead...
> 
> I have tested it, list_for_each_entry can't work. Dose it mean that my
> patch is OK? Or please give me some other advices.

I dunno. Your change is technically correct of course. I find the exit
condition easier to read without your patch though.

-- 
Michal Hocko
SUSE Labs
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