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Date: Tue, 4 Apr 2017 11:02:39 -0500
From: Reza Arbab <arbab@...ux.vnet.ibm.com>
To: Michal Hocko <mhocko@...nel.org>
Cc: Mel Gorman <mgorman@...e.de>, linux-mm@...ck.org,
Andrew Morton <akpm@...ux-foundation.org>,
Vlastimil Babka <vbabka@...e.cz>,
Andrea Arcangeli <aarcange@...hat.com>,
Yasuaki Ishimatsu <yasu.isimatu@...il.com>,
Tang Chen <tangchen@...fujitsu.com>, qiuxishi@...wei.com,
Kani Toshimitsu <toshi.kani@....com>, slaoub@...il.com,
Joonsoo Kim <js1304@...il.com>,
Andi Kleen <ak@...ux.intel.com>,
Zhang Zhen <zhenzhang.zhang@...wei.com>,
David Rientjes <rientjes@...gle.com>,
Daniel Kiper <daniel.kiper@...cle.com>,
Igor Mammedov <imammedo@...hat.com>,
Vitaly Kuznetsov <vkuznets@...hat.com>,
LKML <linux-kernel@...r.kernel.org>,
Chris Metcalf <cmetcalf@...lanox.com>,
Dan Williams <dan.j.williams@...il.com>,
Heiko Carstens <heiko.carstens@...ibm.com>,
Lai Jiangshan <laijs@...fujitsu.com>,
Martin Schwidefsky <schwidefsky@...ibm.com>
Subject: Re: [PATCH 0/6] mm: make movable onlining suck less
On Tue, Apr 04, 2017 at 10:23:02AM +0200, Michal Hocko wrote:
>diff --git a/drivers/base/node.c b/drivers/base/node.c
>index 5548f9686016..ee080a35e869 100644
>--- a/drivers/base/node.c
>+++ b/drivers/base/node.c
>@@ -368,8 +368,6 @@ int unregister_cpu_under_node(unsigned int cpu, unsigned int nid)
> }
>
> #ifdef CONFIG_MEMORY_HOTPLUG_SPARSE
>-#define page_initialized(page) (page->lru.next)
>-
> static int __ref get_nid_for_pfn(unsigned long pfn)
> {
> struct page *page;
>@@ -380,9 +378,6 @@ static int __ref get_nid_for_pfn(unsigned long pfn)
> if (system_state == SYSTEM_BOOTING)
> return early_pfn_to_nid(pfn);
> #endif
>- page = pfn_to_page(pfn);
>- if (!page_initialized(page))
>- return -1;
> return pfn_to_nid(pfn);
> }
>
You can get rid of 'page' altogether.
drivers/base/node.c: In function ‘get_nid_for_pfn’:
drivers/base/node.c:373:15: warning: unused variable ‘page’ [-Wunused-variable]
--
Reza Arbab
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