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[PATCH] swsusp: Fix mark_free_pages

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Clean up mm/page_alloc.c#mark_free_pages() and make it avoid clearing
PageNosaveFree for PageNosave pages.  This allows us to get rid of an ugly
hack in kernel/power/snapshot.c#copy_data_pages().

Additionally, the page-copying loop in copy_data_pages() is moved to an
inline function.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Rafael J. Wysocki
2006-09-25 23:32:49 -07:00
committed by Linus Torvalds
parent e3920fb42c
commit f623f0db8e
2 changed files with 29 additions and 22 deletions
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24
mm/page_alloc.c
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@@ -694,7 +694,8 @@ static void __drain_pages(unsigned int cpu)
void mark_free_pages(struct zone *zone)
{
unsigned long zone_pfn, flags;
unsigned long pfn, max_zone_pfn;
unsigned long flags;
int order;
struct list_head *curr;
@@ -702,18 +703,25 @@ void mark_free_pages(struct zone *zone)
return;
spin_lock_irqsave(&zone->lock, flags);
for (zone_pfn = 0; zone_pfn < zone->spanned_pages; ++zone_pfn)
ClearPageNosaveFree(pfn_to_page(zone_pfn + zone->zone_start_pfn));
max_zone_pfn = zone->zone_start_pfn + zone->spanned_pages;
for (pfn = zone->zone_start_pfn; pfn < max_zone_pfn; pfn++)
if (pfn_valid(pfn)) {
struct page *page = pfn_to_page(pfn);
if (!PageNosave(page))
ClearPageNosaveFree(page);
}
for (order = MAX_ORDER - 1; order >= 0; --order)
list_for_each(curr, &zone->free_area[order].free_list) {
unsigned long start_pfn, i;
unsigned long i;
start_pfn = page_to_pfn(list_entry(curr, struct page, lru));
pfn = page_to_pfn(list_entry(curr, struct page, lru));
for (i = 0; i < (1UL << order); i++)
SetPageNosaveFree(pfn_to_page(pfn + i));
}
for (i=0; i < (1<<order); i++)
SetPageNosaveFree(pfn_to_page(start_pfn+i));
}
spin_unlock_irqrestore(&zone->lock, flags);
}