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authorKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>2010-05-24 14:32:38 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-05-25 08:07:00 -0700
commitec95f53aa6ed62ba68660cb19c8474ebe9025cce (patch)
tree953ad71c8ee0373ca76f17ee9df65358ad2fe7b7 /mm
parent5f53e76299ceebd68bdf9495e8ff80db77711236 (diff)
downloadop-kernel-dev-ec95f53aa6ed62ba68660cb19c8474ebe9025cce.zip
op-kernel-dev-ec95f53aa6ed62ba68660cb19c8474ebe9025cce.tar.gz
mm: introduce free_pages_prepare()
free_hot_cold_page() and __free_pages_ok() have very similar freeing preparation. Consolidate them. [akpm@linux-foundation.org: fix busted coding style] Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Acked-by: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/page_alloc.c40
1 files changed, 21 insertions, 19 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 95ad42d..8f4f278 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -620,20 +620,23 @@ static void free_one_page(struct zone *zone, struct page *page, int order,
spin_unlock(&zone->lock);
}
-static void __free_pages_ok(struct page *page, unsigned int order)
+static bool free_pages_prepare(struct page *page, unsigned int order)
{
- unsigned long flags;
int i;
int bad = 0;
- int wasMlocked = __TestClearPageMlocked(page);
trace_mm_page_free_direct(page, order);
kmemcheck_free_shadow(page, order);
- for (i = 0 ; i < (1 << order) ; ++i)
- bad += free_pages_check(page + i);
+ for (i = 0; i < (1 << order); i++) {
+ struct page *pg = page + i;
+
+ if (PageAnon(pg))
+ pg->mapping = NULL;
+ bad += free_pages_check(pg);
+ }
if (bad)
- return;
+ return false;
if (!PageHighMem(page)) {
debug_check_no_locks_freed(page_address(page),PAGE_SIZE<<order);
@@ -643,6 +646,17 @@ static void __free_pages_ok(struct page *page, unsigned int order)
arch_free_page(page, order);
kernel_map_pages(page, 1 << order, 0);
+ return true;
+}
+
+static void __free_pages_ok(struct page *page, unsigned int order)
+{
+ unsigned long flags;
+ int wasMlocked = __TestClearPageMlocked(page);
+
+ if (!free_pages_prepare(page, order))
+ return;
+
local_irq_save(flags);
if (unlikely(wasMlocked))
free_page_mlock(page);
@@ -1128,21 +1142,9 @@ void free_hot_cold_page(struct page *page, int cold)
int migratetype;
int wasMlocked = __TestClearPageMlocked(page);
- trace_mm_page_free_direct(page, 0);
- kmemcheck_free_shadow(page, 0);
-
- if (PageAnon(page))
- page->mapping = NULL;
- if (free_pages_check(page))
+ if (!free_pages_prepare(page, 0))
return;
- if (!PageHighMem(page)) {
- debug_check_no_locks_freed(page_address(page), PAGE_SIZE);
- debug_check_no_obj_freed(page_address(page), PAGE_SIZE);
- }
- arch_free_page(page, 0);
- kernel_map_pages(page, 1, 0);
-
migratetype = get_pageblock_migratetype(page);
set_page_private(page, migratetype);
local_irq_save(flags);
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