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Subject[PATCHv21 03/16] mm: compaction: introduce map_pages()
From: Michal Nazarewicz <mina86@mina86.com>

This commit creates a map_pages() function which map pages freed
using split_free_pages(). This merely moves some code from
isolate_freepages() so that it can be reused in other places.

Signed-off-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Mel Gorman <mel@csn.ul.ie>
---
mm/compaction.c | 15 +++++++++++----
1 files changed, 11 insertions(+), 4 deletions(-)
diff --git a/mm/compaction.c b/mm/compaction.c
index 62902b6..9bbcc53 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -127,6 +127,16 @@ static bool suitable_migration_target(struct page *page)
return false;
}

+static void map_pages(struct list_head *list)
+{
+ struct page *page;
+
+ list_for_each_entry(page, list, lru) {
+ arch_alloc_page(page, 0);
+ kernel_map_pages(page, 1, 1);
+ }
+}
+
/*
* Based on information in the current compact_control, find blocks
* suitable for isolating free pages from and then isolate them.
@@ -206,10 +216,7 @@ static void isolate_freepages(struct zone *zone,
}

/* split_free_page does not map the pages */
- list_for_each_entry(page, freelist, lru) {
- arch_alloc_page(page, 0);
- kernel_map_pages(page, 1, 1);
- }
+ map_pages(freelist);

cc->free_pfn = high_pfn;
cc->nr_freepages = nr_freepages;
--
1.7.1.569.g6f426


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