From: Nick Piggin <npiggin@suse.de>
Date: Wed, 11 Oct 2006 08:21:30 +0000 (-0700)
Subject: [PATCH] mm: arch_free_page fix
X-Git-Tag: v2.6.19-rc2~99
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dafb13673c463bc2aade4a4819704dde0f5fa37f;p=linux-2.6

[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 8246e834b2..c5caac2c3c 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -495,7 +495,6 @@ static void __free_pages_ok(struct page *page, unsigned int order)
 	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 @@ static void __free_pages_ok(struct page *page, unsigned int order)
 	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 @@ static void fastcall free_hot_cold_page(struct page *page, int cold)
 	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];