3 files changed, 16 insertions, 5 deletions

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index ea77c999047e..813b4ec1298a 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -39,6 +39,7 @@
 #include <linux/mempolicy.h>
 
 #include <asm/tlbflush.h>
+#include <asm/div64.h>
 #include "internal.h"
 
 /*
@@ -2566,9 +2567,11 @@ void setup_per_zone_pages_min(void)
         }
 
         for_each_zone(zone) {
-                unsigned long tmp;
+                u64 tmp;
+
                 spin_lock_irqsave(&zone->lru_lock, flags);
-                tmp = (pages_min * zone->present_pages) / lowmem_pages;
+                tmp = (u64)pages_min * zone->present_pages;
+                do_div(tmp, lowmem_pages);
                 if (is_highmem(zone)) {
                         /*
                          * __GFP_HIGH and PF_MEMALLOC allocations usually don't
@@ -2595,8 +2598,8 @@ void setup_per_zone_pages_min(void)
                         zone->pages_min = tmp;
                 }
 
-                zone->pages_low   = zone->pages_min + tmp / 4;
-                zone->pages_high  = zone->pages_min + tmp / 2;
+                zone->pages_low   = zone->pages_min + (tmp >> 2);
+                zone->pages_high  = zone->pages_min + (tmp >> 1);
                 spin_unlock_irqrestore(&zone->lru_lock, flags);
         }
 
diff --git a/mm/slab.c b/mm/slab.c
index c32af7e7581e..b1d643b5238d 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -700,6 +700,14 @@ static enum {
         FULL
 } g_cpucache_up;
 
+/*
+ * used by boot code to determine if it can use slab based allocator
+ */
+int slab_is_available(void)
+{
+        return g_cpucache_up == FULL;
+}
+
 static DEFINE_PER_CPU(struct work_struct, reap_work);
 
 static void free_block(struct kmem_cache *cachep, void **objpp, int len,
diff --git a/mm/sparse.c b/mm/sparse.c
index d7c32de99ee8..c5e89eb9ac8f 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -32,7 +32,7 @@ static struct mem_section *sparse_index_alloc(int nid)
         unsigned long array_size = SECTIONS_PER_ROOT *
                                    sizeof(struct mem_section);
 
-        if (system_state == SYSTEM_RUNNING)
+        if (slab_is_available())
                 section = kmalloc_node(array_size, GFP_KERNEL, nid);
         else
                 section = alloc_bootmem_node(NODE_DATA(nid), array_size);