From 95144c788dc01b6a0ff2c9c2222e37ffdab358b8 Mon Sep 17 00:00:00 2001
From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Date: Mon, 27 Mar 2006 01:16:02 -0800
Subject: [PATCH] [PATCH] uninline zone helpers

Helper functions for for_each_online_pgdat/for_each_zone look too big to be
inlined.  Speed of these helper macro itself is not very important.  (inner
loops are tend to do more work than this)

This patch make helper function to be out-of-lined.

	inline		out-of-line
.text   005c0680        005bf6a0

005c0680 - 005bf6a0 = FE0 = 4Kbytes.

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
 include/linux/mmzone.h | 38 +++-----------------------------
 mm/Makefile            |  2 +-
 mm/mmzone.c            | 50 ++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 54 insertions(+), 36 deletions(-)
 create mode 100644 mm/mmzone.c

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 0d12c3cf1f8..b5c21122c29 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -418,20 +418,9 @@ extern struct pglist_data contig_page_data;
 
 #endif /* !CONFIG_NEED_MULTIPLE_NODES */
 
-static inline struct pglist_data *first_online_pgdat(void)
-{
-	return NODE_DATA(first_online_node);
-}
-
-static inline struct pglist_data *next_online_pgdat(struct pglist_data *pgdat)
-{
-	int nid = next_online_node(pgdat->node_id);
-
-	if (nid == MAX_NUMNODES)
-		return NULL;
-	return NODE_DATA(nid);
-}
-
+extern struct pglist_data *first_online_pgdat(void);
+extern struct pglist_data *next_online_pgdat(struct pglist_data *pgdat);
+extern struct zone *next_zone(struct zone *zone);
 
 /**
  * for_each_pgdat - helper macro to iterate over all nodes
@@ -441,27 +430,6 @@ static inline struct pglist_data *next_online_pgdat(struct pglist_data *pgdat)
 	for (pgdat = first_online_pgdat();		\
 	     pgdat;					\
 	     pgdat = next_online_pgdat(pgdat))
-
-/*
- * next_zone - helper magic for for_each_zone()
- * Thanks to William Lee Irwin III for this piece of ingenuity.
- */
-static inline struct zone *next_zone(struct zone *zone)
-{
-	pg_data_t *pgdat = zone->zone_pgdat;
-
-	if (zone < pgdat->node_zones + MAX_NR_ZONES - 1)
-		zone++;
-	else {
-		pgdat = next_online_pgdat(pgdat);
-		if (pgdat)
-			zone = pgdat->node_zones;
-		else
-			zone = NULL;
-	}
-	return zone;
-}
-
 /**
  * for_each_zone - helper macro to iterate over all memory zones
  * @zone - pointer to struct zone variable
diff --git a/mm/Makefile b/mm/Makefile
index f10c753dce6..0b8f73f2ed1 100644
--- a/mm/Makefile
+++ b/mm/Makefile
@@ -10,7 +10,7 @@ mmu-$(CONFIG_MMU)	:= fremap.o highmem.o madvise.o memory.o mincore.o \
 obj-y			:= bootmem.o filemap.o mempool.o oom_kill.o fadvise.o \
 			   page_alloc.o page-writeback.o pdflush.o \
 			   readahead.o swap.o truncate.o vmscan.o \
-			   prio_tree.o util.o $(mmu-y)
+			   prio_tree.o util.o mmzone.o $(mmu-y)
 
 obj-$(CONFIG_SWAP)	+= page_io.o swap_state.o swapfile.o thrash.o
 obj-$(CONFIG_HUGETLBFS)	+= hugetlb.o
diff --git a/mm/mmzone.c b/mm/mmzone.c
new file mode 100644
index 00000000000..b022370e612
--- /dev/null
+++ b/mm/mmzone.c
@@ -0,0 +1,50 @@
+/*
+ * linux/mm/mmzone.c
+ *
+ * management codes for pgdats and zones.
+ */
+
+
+#include <linux/config.h>
+#include <linux/stddef.h>
+#include <linux/mmzone.h>
+#include <linux/module.h>
+
+struct pglist_data *first_online_pgdat(void)
+{
+	return NODE_DATA(first_online_node);
+}
+
+EXPORT_SYMBOL(first_online_pgdat);
+
+struct pglist_data *next_online_pgdat(struct pglist_data *pgdat)
+{
+	int nid = next_online_node(pgdat->node_id);
+
+	if (nid == MAX_NUMNODES)
+		return NULL;
+	return NODE_DATA(nid);
+}
+EXPORT_SYMBOL(next_online_pgdat);
+
+
+/*
+ * next_zone - helper magic for for_each_zone()
+ */
+struct zone *next_zone(struct zone *zone)
+{
+	pg_data_t *pgdat = zone->zone_pgdat;
+
+	if (zone < pgdat->node_zones + MAX_NR_ZONES - 1)
+		zone++;
+	else {
+		pgdat = next_online_pgdat(pgdat);
+		if (pgdat)
+			zone = pgdat->node_zones;
+		else
+			zone = NULL;
+	}
+	return zone;
+}
+EXPORT_SYMBOL(next_zone);
+