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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>
This commit is contained in:
KOSAKI Motohiro 2010-05-24 14:32:38 -07:00 committed by Linus Torvalds
parent 5f53e76299
commit ec95f53aa6
1 changed files with 21 additions and 19 deletions
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40
mm/page_alloc.c
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@ -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);