linux-kernel - [PATCH] mm: fix potential build error in compaction.h

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Message-Id: <20190208080437.253322-1-yuzhao@google.com>
Date:   Fri,  8 Feb 2019 01:04:37 -0700
From:   Yu Zhao <yuzhao@...gle.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org, Yu Zhao <yuzhao@...gle.com>
Subject: [PATCH] mm: fix potential build error in compaction.h

Declaration of struct node is required regardless. On UMA system,
including compaction.h without proceeding node.h shouldn't cause
build error.

Signed-off-by: Yu Zhao <yuzhao@...gle.com>
---
 include/linux/compaction.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/compaction.h b/include/linux/compaction.h
index 68250a57aace..be165b220996 100644
--- a/include/linux/compaction.h
+++ b/include/linux/compaction.h
@@ -220,22 +220,22 @@ static inline int kcompactd_run(int nid)
 static inline void kcompactd_stop(int nid)
 {
 }
 
 static inline void wakeup_kcompactd(pg_data_t *pgdat, int order, int classzone_idx)
 {
 }
 
 #endif /* CONFIG_COMPACTION */
 
-#if defined(CONFIG_COMPACTION) && defined(CONFIG_SYSFS) && defined(CONFIG_NUMA)
 struct node;
+#if defined(CONFIG_COMPACTION) && defined(CONFIG_SYSFS) && defined(CONFIG_NUMA)
 extern int compaction_register_node(struct node *node);
 extern void compaction_unregister_node(struct node *node);
 
 #else
 
 static inline int compaction_register_node(struct node *node)
 {
 	return 0;
 }
 
-- 
2.20.1.791.gb4d0f1c61a-goog