mm/page_owner: move page_owner specific function to page_owner.c

There is no reason that page_owner specific function resides on
vmstat.c.

Link: http://lkml.kernel.org/r/1471315879-32294-4-git-send-email-iamjoonsoo.kim@lge.com
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Michal Hocko <mhocko@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

3 files changed, 79 insertions, 79 deletions

diff --git a/include/linux/page_owner.h b/include/linux/page_owner.h
index 30583ab0ffb1..2be728d156b5 100644
--- a/include/linux/page_owner.h
+++ b/include/linux/page_owner.h
@@ -14,6 +14,8 @@ extern void __split_page_owner(struct page *page, unsigned int order);
 extern void __copy_page_owner(struct page *oldpage, struct page *newpage);
 extern void __set_page_owner_migrate_reason(struct page *page, int reason);
 extern void __dump_page_owner(struct page *page);
+extern void pagetypeinfo_showmixedcount_print(struct seq_file *m,
+                                        pg_data_t *pgdat, struct zone *zone);
 
 static inline void reset_page_owner(struct page *page, unsigned int order)
 {
diff --git a/mm/page_owner.c b/mm/page_owner.c
index ec6dc1886f71..0f4246d109a0 100644
--- a/mm/page_owner.c
+++ b/mm/page_owner.c
@@ -8,6 +8,7 @@
 #include <linux/jump_label.h>
 #include <linux/migrate.h>
 #include <linux/stackdepot.h>
+#include <linux/seq_file.h>
 
 #include "internal.h"
 
@@ -214,6 +215,82 @@ void __copy_page_owner(struct page *oldpage, struct page *newpage)
         __set_bit(PAGE_EXT_OWNER, &new_ext->flags);
 }
 
+void pagetypeinfo_showmixedcount_print(struct seq_file *m,
+                                       pg_data_t *pgdat, struct zone *zone)
+{
+        struct page *page;
+        struct page_ext *page_ext;
+        unsigned long pfn = zone->zone_start_pfn, block_end_pfn;
+        unsigned long end_pfn = pfn + zone->spanned_pages;
+        unsigned long count[MIGRATE_TYPES] = { 0, };
+        int pageblock_mt, page_mt;
+        int i;
+
+        /* Scan block by block. First and last block may be incomplete */
+        pfn = zone->zone_start_pfn;
+
+        /*
+         * Walk the zone in pageblock_nr_pages steps. If a page block spans
+         * a zone boundary, it will be double counted between zones. This does
+         * not matter as the mixed block count will still be correct
+         */
+        for (; pfn < end_pfn; ) {
+                if (!pfn_valid(pfn)) {
+                        pfn = ALIGN(pfn + 1, MAX_ORDER_NR_PAGES);
+                        continue;
+                }
+
+                block_end_pfn = ALIGN(pfn + 1, pageblock_nr_pages);
+                block_end_pfn = min(block_end_pfn, end_pfn);
+
+                page = pfn_to_page(pfn);
+                pageblock_mt = get_pageblock_migratetype(page);
+
+                for (; pfn < block_end_pfn; pfn++) {
+                        if (!pfn_valid_within(pfn))
+                                continue;
+
+                        page = pfn_to_page(pfn);
+
+                        if (page_zone(page) != zone)
+                                continue;
+
+                        if (PageBuddy(page)) {
+                                pfn += (1UL << page_order(page)) - 1;
+                                continue;
+                        }
+
+                        if (PageReserved(page))
+                                continue;
+
+                        page_ext = lookup_page_ext(page);
+                        if (unlikely(!page_ext))
+                                continue;
+
+                        if (!test_bit(PAGE_EXT_OWNER, &page_ext->flags))
+                                continue;
+
+                        page_mt = gfpflags_to_migratetype(page_ext->gfp_mask);
+                        if (pageblock_mt != page_mt) {
+                                if (is_migrate_cma(pageblock_mt))
+                                        count[MIGRATE_MOVABLE]++;
+                                else
+                                        count[pageblock_mt]++;
+
+                                pfn = block_end_pfn;
+                                break;
+                        }
+                        pfn += (1UL << page_ext->order) - 1;
+                }
+        }
+
+        /* Print counts */
+        seq_printf(m, "Node %d, zone %8s ", pgdat->node_id, zone->name);
+        for (i = 0; i < MIGRATE_TYPES; i++)
+                seq_printf(m, "%12lu ", count[i]);
+        seq_putc(m, '\n');
+}
+
 static ssize_t
 print_page_owner(char __user *buf, size_t count, unsigned long pfn,
                 struct page *page, struct page_ext *page_ext,
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 89cec42d19ff..dc04e76c7950 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -1254,85 +1254,6 @@ static int pagetypeinfo_showblockcount(struct seq_file *m, void *arg)
         return 0;
 }
 
-#ifdef CONFIG_PAGE_OWNER
-static void pagetypeinfo_showmixedcount_print(struct seq_file *m,
-                                                        pg_data_t *pgdat,
-                                                        struct zone *zone)
-{
-        struct page *page;
-        struct page_ext *page_ext;
-        unsigned long pfn = zone->zone_start_pfn, block_end_pfn;
-        unsigned long end_pfn = pfn + zone->spanned_pages;
-        unsigned long count[MIGRATE_TYPES] = { 0, };
-        int pageblock_mt, page_mt;
-        int i;
-
-        /* Scan block by block. First and last block may be incomplete */
-        pfn = zone->zone_start_pfn;
-
-        /*
-         * Walk the zone in pageblock_nr_pages steps. If a page block spans
-         * a zone boundary, it will be double counted between zones. This does
-         * not matter as the mixed block count will still be correct
-         */
-        for (; pfn < end_pfn; ) {
-                if (!pfn_valid(pfn)) {
-                        pfn = ALIGN(pfn + 1, MAX_ORDER_NR_PAGES);
-                        continue;
-                }
-
-                block_end_pfn = ALIGN(pfn + 1, pageblock_nr_pages);
-                block_end_pfn = min(block_end_pfn, end_pfn);
-
-                page = pfn_to_page(pfn);
-                pageblock_mt = get_pageblock_migratetype(page);
-
-                for (; pfn < block_end_pfn; pfn++) {
-                        if (!pfn_valid_within(pfn))
-                                continue;
-
-                        page = pfn_to_page(pfn);
-
-                        if (page_zone(page) != zone)
-                                continue;
-
-                        if (PageBuddy(page)) {
-                                pfn += (1UL << page_order(page)) - 1;
-                                continue;
-                        }
-
-                        if (PageReserved(page))
-                                continue;
-
-                        page_ext = lookup_page_ext(page);
-                        if (unlikely(!page_ext))
-                                continue;
-
-                        if (!test_bit(PAGE_EXT_OWNER, &page_ext->flags))
-                                continue;
-
-                        page_mt = gfpflags_to_migratetype(page_ext->gfp_mask);
-                        if (pageblock_mt != page_mt) {
-                                if (is_migrate_cma(pageblock_mt))
-                                        count[MIGRATE_MOVABLE]++;
-                                else
-                                        count[pageblock_mt]++;
-
-                                pfn = block_end_pfn;
-                                break;
-                        }
-                        pfn += (1UL << page_ext->order) - 1;
-                }
-        }
-
-        /* Print counts */
-        seq_printf(m, "Node %d, zone %8s ", pgdat->node_id, zone->name);
-        for (i = 0; i < MIGRATE_TYPES; i++)
-                seq_printf(m, "%12lu ", count[i]);
-        seq_putc(m, '\n');
-}
-#endif /* CONFIG_PAGE_OWNER */
-
 /*
  * Print out the number of pageblocks for each migratetype that contain pages
  * of other types. This gives an indication of how well fallbacks are being