slub: fix atomic usage in any_slab_objects()

[karo-tx-linux.git] / mm / slub.c

diff --git a/mm/slub.c b/mm/slub.c
index 992ecd4f0d393c748dceec95e3ddd714b16557b4..a505a828ef411e08f149a413fb37f32da7c47e21 100644 (file)
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -19,8 +19,10 @@
 #include <linux/cpuset.h>
 #include <linux/mempolicy.h>
 #include <linux/ctype.h>
+#include <linux/debugobjects.h>
 #include <linux/kallsyms.h>
 #include <linux/memory.h>
+#include <linux/math64.h>
 
 /*
  * Lock order:
@@ -215,7 +217,7 @@ struct track {
 
 enum track_item { TRACK_ALLOC, TRACK_FREE };
 
-#if defined(CONFIG_SYSFS) && defined(CONFIG_SLUB_DEBUG)
+#ifdef CONFIG_SLUB_DEBUG
 static int sysfs_slab_add(struct kmem_cache *);
 static int sysfs_slab_alias(struct kmem_cache *, const char *);
 static void sysfs_slab_remove(struct kmem_cache *);
@@ -812,7 +814,8 @@ static int on_freelist(struct kmem_cache *s, struct page *page, void *search)
        return search == NULL;
 }
 
-static void trace(struct kmem_cache *s, struct page *page, void *object, int alloc)
+static void trace(struct kmem_cache *s, struct page *page, void *object,
+                                                               int alloc)
 {
        if (s->flags & SLAB_TRACE) {
                printk(KERN_INFO "TRACE %s %s 0x%p inuse=%d fp=0x%p\n",
@@ -1265,8 +1268,7 @@ static void add_partial(struct kmem_cache_node *n,
        spin_unlock(&n->list_lock);
 }
 
-static void remove_partial(struct kmem_cache *s,
-                                               struct page *page)
+static void remove_partial(struct kmem_cache *s, struct page *page)
 {
        struct kmem_cache_node *n = get_node(s, page_to_nid(page));
 
@@ -1281,7 +1283,8 @@ static void remove_partial(struct kmem_cache *s,
  *
  * Must hold list_lock.
  */
-static inline int lock_and_freeze_slab(struct kmem_cache_node *n, struct page *page)
+static inline int lock_and_freeze_slab(struct kmem_cache_node *n,
+                                                       struct page *page)
 {
        if (slab_trylock(page)) {
                list_del(&page->lru);
@@ -1418,8 +1421,8 @@ static void unfreeze_slab(struct kmem_cache *s, struct page *page, int tail)
                         * so that the others get filled first. That way the
                         * size of the partial list stays small.
                         *
-                        * kmem_cache_shrink can reclaim any empty slabs from the
-                        * partial list.
+                        * kmem_cache_shrink can reclaim any empty slabs from
+                        * the partial list.
                         */
                        add_partial(n, page, 1);
                        slab_unlock(page);
@@ -1747,6 +1750,8 @@ static __always_inline void slab_free(struct kmem_cache *s,
        local_irq_save(flags);
        c = get_cpu_slab(s, smp_processor_id());
        debug_check_no_locks_freed(object, c->objsize);
+       if (!(s->flags & SLAB_DEBUG_OBJECTS))
+               debug_check_no_obj_freed(object, s->objsize);
        if (likely(page == c->page && c->node >= 0)) {
                object[c->offset] = c->freelist;
                c->freelist = object;
@@ -2905,7 +2910,7 @@ static int slab_mem_going_online_callback(void *arg)
                return 0;
 
        /*
-        * We are bringing a node online. No memory is availabe yet. We must
+        * We are bringing a node online. No memory is available yet. We must
         * allocate a kmem_cache_node structure in order to bring the node
         * online.
         */
@@ -2978,7 +2983,7 @@ void __init kmem_cache_init(void)
        kmalloc_caches[0].refcount = -1;
        caches++;
 
-       hotplug_memory_notifier(slab_memory_callback, 1);
+       hotplug_memory_notifier(slab_memory_callback, SLAB_CALLBACK_PRI);
 #endif
 
        /* Able to allocate the per node structures */
@@ -3242,7 +3247,7 @@ void *__kmalloc_node_track_caller(size_t size, gfp_t gfpflags,
        return slab_alloc(s, gfpflags, node, caller);
 }
 
-#if (defined(CONFIG_SYSFS) && defined(CONFIG_SLUB_DEBUG)) || defined(CONFIG_SLABINFO)
+#ifdef CONFIG_SLUB_DEBUG
 static unsigned long count_partial(struct kmem_cache_node *n,
                                        int (*get_count)(struct page *))
 {
@@ -3271,9 +3276,7 @@ static int count_free(struct page *page)
 {
        return page->objects - page->inuse;
 }
-#endif
 
-#if defined(CONFIG_SYSFS) && defined(CONFIG_SLUB_DEBUG)
 static int validate_slab(struct kmem_cache *s, struct page *page,
                                                unsigned long *map)
 {
@@ -3618,12 +3621,10 @@ static int list_locations(struct kmem_cache *s, char *buf,
                        len += sprintf(buf + len, "<not-available>");
 
                if (l->sum_time != l->min_time) {
-                       unsigned long remainder;
-
                        len += sprintf(buf + len, " age=%ld/%ld/%ld",
-                       l->min_time,
-                       div_long_long_rem(l->sum_time, l->count, &remainder),
-                       l->max_time);
+                               l->min_time,
+                               (long)div_u64(l->sum_time, l->count),
+                               l->max_time);
                } else
                        len += sprintf(buf + len, " age=%ld",
                                l->min_time);
@@ -3761,7 +3762,7 @@ static int any_slab_objects(struct kmem_cache *s)
                if (!n)
                        continue;
 
-               if (atomic_read(&n->total_objects))
+               if (atomic_long_read(&n->total_objects))
                        return 1;
        }
        return 0;
@@ -3810,7 +3811,12 @@ SLAB_ATTR_RO(objs_per_slab);
 static ssize_t order_store(struct kmem_cache *s,
                                const char *buf, size_t length)
 {
-       int order = simple_strtoul(buf, NULL, 10);
+       unsigned long order;
+       int err;
+
+       err = strict_strtoul(buf, 10, &order);
+       if (err)
+               return err;
 
        if (order > slub_max_order || order < slub_min_order)
                return -EINVAL;
@@ -4063,10 +4069,16 @@ static ssize_t remote_node_defrag_ratio_show(struct kmem_cache *s, char *buf)
 static ssize_t remote_node_defrag_ratio_store(struct kmem_cache *s,
                                const char *buf, size_t length)
 {
-       int n = simple_strtoul(buf, NULL, 10);
+       unsigned long ratio;
+       int err;
+
+       err = strict_strtoul(buf, 10, &ratio);
+       if (err)
+               return err;
+
+       if (ratio < 100)
+               s->remote_node_defrag_ratio = ratio * 10;
 
-       if (n < 100)
-               s->remote_node_defrag_ratio = n * 10;
        return length;
 }
 SLAB_ATTR(remote_node_defrag_ratio);
@@ -4423,8 +4435,8 @@ __initcall(slab_sysfs_init);
  */
 #ifdef CONFIG_SLABINFO
 
-ssize_t slabinfo_write(struct file *file, const char __user * buffer,
-                       size_t count, loff_t *ppos)
+ssize_t slabinfo_write(struct file *file, const char __user *buffer,
+                      size_t count, loff_t *ppos)
 {
        return -EINVAL;
 }