Commit 95144c78 authored by KAMEZAWA Hiroyuki's avatar KAMEZAWA Hiroyuki Committed by Linus Torvalds
Browse files

[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: default avatarKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent ae0f15fb

include/linux/mmzone.h

+3 −35
Original line number Diff line number Diff line
@@ -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

mm/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -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

mm/mmzone.c

0 → 100644
+50 −0
Original line number Diff line number Diff line 
/*

 * 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);

CRA Git | Maintained and supported by SUSTech CRA and CCSE