linux-kernel - [PATCH 2/3] mm,compaction: Add COMPACTION

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Date:	Thu, 11 Nov 2010 19:07:03 +0000
From:	Mel Gorman <mel@....ul.ie>
To:	Andrea Arcangeli <aarcange@...hat.com>
Cc:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Rik van Riel <riel@...hat.com>,
	Johannes Weiner <hannes@...xchg.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 2/3] mm,compaction: Add COMPACTION_BUILD

To avoid #ifdef COMPACTION in a following patch, this patch adds
COMPACTION_BUILD that is similar to NUMA_BUILD in operation.

Signed-off-by: Mel Gorman <mel@....ul.ie>
---
 include/linux/kernel.h |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 450092c..c00c5d1 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -826,6 +826,13 @@ struct sysinfo {
 #define NUMA_BUILD 0
 #endif
 
+/* This helps us avoid #ifdef CONFIG_COMPACTION */
+#ifdef CONFIG_COMPACTION
+#define COMPACTION_BUILD 1
+#else
+#define COMPACTION_BUILD 0
+#endif
+
 /* Rebuild everything on CONFIG_FTRACE_MCOUNT_RECORD */
 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
 # define REBUILD_DUE_TO_FTRACE_MCOUNT_RECORD
-- 
1.7.1

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