[PATCH] mm: arch_free_page fix
After the PG_reserved check was added, arch_free_page was being called in the
wrong place (it could be called for a page we don't actually want to free).
Fix that.
Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 8246e83..c5caac2 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -495,7 +495,6 @@
int i;
int reserved = 0;
- arch_free_page(page, order);
if (!PageHighMem(page))
debug_check_no_locks_freed(page_address(page),
PAGE_SIZE<<order);
@@ -505,7 +504,9 @@
if (reserved)
return;
+ arch_free_page(page, order);
kernel_map_pages(page, 1 << order, 0);
+
local_irq_save(flags);
__count_vm_events(PGFREE, 1 << order);
free_one_page(page_zone(page), page, order);
@@ -781,13 +782,12 @@
struct per_cpu_pages *pcp;
unsigned long flags;
- arch_free_page(page, 0);
-
if (PageAnon(page))
page->mapping = NULL;
if (free_pages_check(page))
return;
+ arch_free_page(page, 0);
kernel_map_pages(page, 1, 0);
pcp = &zone_pcp(zone, get_cpu())->pcp[cold];