[PATCH] USB: console: fix oops

[pandora-kernel.git] / mm / slab.c

diff --git a/mm/slab.c b/mm/slab.c
index c32af7e..f1b644e 100644 (file)
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -207,11 +207,6 @@ typedef unsigned int kmem_bufctl_t;
 #define        BUFCTL_ACTIVE   (((kmem_bufctl_t)(~0U))-2)
 #define        SLAB_LIMIT      (((kmem_bufctl_t)(~0U))-3)
 
-/* Max number of objs-per-slab for caches which use off-slab slabs.
- * Needed to avoid a possible looping condition in cache_grow().
- */
-static unsigned long offslab_limit;
-
 /*
  * struct slab
  *
@@ -700,6 +695,14 @@ 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,
@@ -1348,12 +1351,6 @@ void __init kmem_cache_init(void)
                                        NULL, NULL);
                }
 
-               /* Inc off-slab bufctl limit until the ceiling is hit. */
-               if (!(OFF_SLAB(sizes->cs_cachep))) {
-                       offslab_limit = sizes->cs_size - sizeof(struct slab);
-                       offslab_limit /= sizeof(kmem_bufctl_t);
-               }
-
                sizes->cs_dmacachep = kmem_cache_create(names->name_dma,
                                        sizes->cs_size,
                                        ARCH_KMALLOC_MINALIGN,
@@ -1772,6 +1769,7 @@ static void set_up_list3s(struct kmem_cache *cachep, int index)
 static size_t calculate_slab_order(struct kmem_cache *cachep,
                        size_t size, size_t align, unsigned long flags)
 {
+       unsigned long offslab_limit;
        size_t left_over = 0;
        int gfporder;
 
@@ -1783,9 +1781,18 @@ static size_t calculate_slab_order(struct kmem_cache *cachep,
                if (!num)
                        continue;
 
-               /* More than offslab_limit objects will cause problems */
-               if ((flags & CFLGS_OFF_SLAB) && num > offslab_limit)
-                       break;
+               if (flags & CFLGS_OFF_SLAB) {
+                       /*
+                        * Max number of objs-per-slab for caches which
+                        * use off-slab slabs. Needed to avoid a possible
+                        * looping condition in cache_grow().
+                        */
+                       offslab_limit = size - sizeof(struct slab);
+                       offslab_limit /= sizeof(kmem_bufctl_t);
+
+                       if (num > offslab_limit)
+                               break;
+               }
 
                /* Found something acceptable - save it away */
                cachep->num = num;
@@ -2192,11 +2199,14 @@ static void drain_cpu_caches(struct kmem_cache *cachep)
        check_irq_on();
        for_each_online_node(node) {
                l3 = cachep->nodelists[node];
-               if (l3) {
+               if (l3 && l3->alien)
+                       drain_alien_cache(cachep, l3->alien);
+       }
+
+       for_each_online_node(node) {
+               l3 = cachep->nodelists[node];
+               if (l3)
                        drain_array(cachep, l3, l3->shared, 1, node);
-                       if (l3->alien)
-                               drain_alien_cache(cachep, l3->alien);
-               }
        }
 }