From: Andrew Morton <akpm@linux-foundation.org>
To: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>,
Zhang Yanfei <zhangyanfei.yes@gmail.com>,
Linux MM <linux-mm@kvack.org>,
mgorman@suse.de, minchan@kernel.org,
kamezawa.hiroyu@jp.fujitsu.com, m.szyprowski@samsung.com,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/3] mm: rename confusing function names
Date: Tue, 5 Feb 2013 17:58:02 -0800 [thread overview]
Message-ID: <20130205175802.2c62c826.akpm@linux-foundation.org> (raw)
In-Reply-To: <5111B318.9020204@cn.fujitsu.com>
On Wed, 06 Feb 2013 09:34:16 +0800 Zhang Yanfei <zhangyanfei@cn.fujitsu.com> wrote:
> >
> >
> > hm,
> >
> > static unsigned int nr_free_zone_pages(int offset)
> > {
> > ...
> > unsigned int sum = 0;
> > ...
> > return sum;
> > }
> >
> > How long will it be until these things start exploding from
> > sums-of-zones which exceed 16TB?
> >
>
> You mean overflow? Hmm.. it might happens. Change the sum to
> unsigned long is ok?
The sum, the return value. And in the case of nr_free_buffer_pages(),
the signedness of the return value (sheesh). Then review and if
necessary fix up all the callsites. That's all a separate exercise.
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WARNING: multiple messages have this Message-ID (diff)
From: Andrew Morton <akpm@linux-foundation.org>
To: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>,
Zhang Yanfei <zhangyanfei.yes@gmail.com>,
Linux MM <linux-mm@kvack.org>,
mgorman@suse.de, minchan@kernel.org,
kamezawa.hiroyu@jp.fujitsu.com, m.szyprowski@samsung.com,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/3] mm: rename confusing function names
Date: Tue, 5 Feb 2013 17:58:02 -0800 [thread overview]
Message-ID: <20130205175802.2c62c826.akpm@linux-foundation.org> (raw)
In-Reply-To: <5111B318.9020204@cn.fujitsu.com>
On Wed, 06 Feb 2013 09:34:16 +0800 Zhang Yanfei <zhangyanfei@cn.fujitsu.com> wrote:
> >
> >
> > hm,
> >
> > static unsigned int nr_free_zone_pages(int offset)
> > {
> > ...
> > unsigned int sum = 0;
> > ...
> > return sum;
> > }
> >
> > How long will it be until these things start exploding from
> > sums-of-zones which exceed 16TB?
> >
>
> You mean overflow? Hmm.. it might happens. Change the sum to
> unsigned long is ok?
The sum, the return value. And in the case of nr_free_buffer_pages(),
the signedness of the return value (sheesh). Then review and if
necessary fix up all the callsites. That's all a separate exercise.
next prev parent reply other threads:[~2013-02-06 1:54 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-05 17:09 [PATCH 0/3] mm: rename confusing function names Zhang Yanfei
2013-02-05 17:09 ` Zhang Yanfei
2013-02-05 17:11 ` [PATCH 1/3] mm: rename nr_free_zone_pages to nr_free_zone_high_pages Zhang Yanfei
2013-02-05 17:11 ` Zhang Yanfei
2013-02-05 17:13 ` [PATCH 2/3] mm: rename nr_free_buffer_pages to nr_free_buffer_high_pages Zhang Yanfei
2013-02-05 17:13 ` Zhang Yanfei
2013-02-05 17:14 ` [PATCH 3/3] mm: rename nr_free_pagecache_pages to nr_free_pagecache_high_pages Zhang Yanfei
2013-02-05 17:14 ` Zhang Yanfei
2013-02-05 19:26 ` [PATCH 0/3] mm: rename confusing function names Johannes Weiner
2013-02-05 19:26 ` Johannes Weiner
2013-02-05 22:13 ` Andrew Morton
2013-02-05 22:13 ` Andrew Morton
2013-02-06 1:06 ` Zhang Yanfei
2013-02-06 1:06 ` Zhang Yanfei
2013-02-06 1:20 ` Andrew Morton
2013-02-06 1:20 ` Andrew Morton
2013-02-06 1:34 ` Zhang Yanfei
2013-02-06 1:34 ` Zhang Yanfei
2013-02-06 1:58 ` Andrew Morton [this message]
2013-02-06 1:58 ` Andrew Morton
2013-02-08 13:34 ` Robin Holt
2013-02-08 13:34 ` Robin Holt
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