[PATCH 3/4] memcg: don't use bootmem allocator in setup code

[Pekka J Enberg]

From: Yinghai Lu <yinghai@xxxxxxxxxx>

The bootmem allocator is no longer available for page_cgroup_init() because we
set up the kernel slab allocator much earlier now.

Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx>
Signed-off-by: Pekka Enberg <penberg@xxxxxxxxxxxxxx>
---
 mm/page_cgroup.c |   12 ++++++++----
 1 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/mm/page_cgroup.c b/mm/page_cgroup.c
index 791905c..3dd4a90 100644
--- a/mm/page_cgroup.c
+++ b/mm/page_cgroup.c
@@ -47,6 +47,8 @@ static int __init alloc_node_page_cgroup(int nid)
 	struct page_cgroup *base, *pc;
 	unsigned long table_size;
 	unsigned long start_pfn, nr_pages, index;
+	struct page *page;
+	unsigned int order;
 
 	start_pfn = NODE_DATA(nid)->node_start_pfn;
 	nr_pages = NODE_DATA(nid)->node_spanned_pages;
@@ -55,11 +57,13 @@ static int __init alloc_node_page_cgroup(int nid)
 		return 0;
 
 	table_size = sizeof(struct page_cgroup) * nr_pages;
-
-	base = __alloc_bootmem_node_nopanic(NODE_DATA(nid),
-			table_size, PAGE_SIZE, __pa(MAX_DMA_ADDRESS));
-	if (!base)
+	order = get_order(table_size);
+	page = alloc_pages_node(nid, GFP_NOWAIT | __GFP_ZERO, order);
+	if (!page)
+		page = alloc_pages_node(-1, GFP_NOWAIT | __GFP_ZERO, order);
+	if (!page)
 		return -ENOMEM;
+	base = page_address(page);
 	for (index = 0; index < nr_pages; index++) {
 		pc = base + index;
 		__init_page_cgroup(pc, start_pfn + index);
-- 
1.6.0.4

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