linux-kernel - [PATCH 1/3] Move zone_reclaim() outside of CONFIG

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Date:	Tue, 30 Nov 2010 15:45:12 +0530
From:	Balbir Singh <balbir@...ux.vnet.ibm.com>
To:	linux-mm@...ck.org, Christoph Lameter <cl@...ux.com>
Cc:	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	kvm <kvm@...r.kernel.org>
Subject: [PATCH 1/3] Move zone_reclaim() outside of CONFIG_NUMA

This patch moves zone_reclaim and associated helpers
outside CONFIG_NUMA. This infrastructure is reused
in the patches for page cache control that follow.

Signed-off-by: Balbir Singh <balbir@...ux.vnet.ibm.com>
---
 include/linux/mmzone.h |    4 ++--
 mm/vmscan.c            |    2 --
 2 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 4890662..aeede91 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -302,12 +302,12 @@ struct zone {
 	 */
 	unsigned long		lowmem_reserve[MAX_NR_ZONES];
 
-#ifdef CONFIG_NUMA
-	int node;
 	/*
 	 * zone reclaim becomes active if more unmapped pages exist.
 	 */
 	unsigned long		min_unmapped_pages;
+#ifdef CONFIG_NUMA
+	int node;
 	unsigned long		min_slab_pages;
 #endif
 	struct per_cpu_pageset __percpu *pageset;
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 8cc90d5..325443a 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2644,7 +2644,6 @@ static int __init kswapd_init(void)
 
 module_init(kswapd_init)
 
-#ifdef CONFIG_NUMA
 /*
  * Zone reclaim mode
  *
@@ -2854,7 +2853,6 @@ int zone_reclaim(struct zone *zone, gfp_t gfp_mask, unsigned int order)
 
 	return ret;
 }
-#endif
 
 /*
  * page_evictable - test whether a page is evictable

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