diff --git a/fs/proc/meminfo.c b/fs/proc/meminfo.c
index 43d2394..74ea974 100644
--- a/fs/proc/meminfo.c
+++ b/fs/proc/meminfo.c
@@ -120,7 +120,7 @@
 		K(i.freeram-i.freehigh),
 #endif
 #ifndef CONFIG_MMU
-		K((unsigned long) atomic_read(&mmap_pages_allocated)),
+		K((unsigned long) atomic_long_read(&mmap_pages_allocated)),
 #endif
 		K(i.totalswap),
 		K(i.freeswap),
diff --git a/fs/proc/task_nommu.c b/fs/proc/task_nommu.c
index 343ea12..370be0a 100644
--- a/fs/proc/task_nommu.c
+++ b/fs/proc/task_nommu.c
@@ -136,14 +136,14 @@
 	}
 
 	seq_printf(m,
-		   "%08lx-%08lx %c%c%c%c %08lx %02x:%02x %lu %n",
+		   "%08lx-%08lx %c%c%c%c %08llx %02x:%02x %lu %n",
 		   vma->vm_start,
 		   vma->vm_end,
 		   flags & VM_READ ? 'r' : '-',
 		   flags & VM_WRITE ? 'w' : '-',
 		   flags & VM_EXEC ? 'x' : '-',
 		   flags & VM_MAYSHARE ? flags & VM_SHARED ? 'S' : 's' : 'p',
-		   vma->vm_pgoff << PAGE_SHIFT,
+		   (unsigned long long) vma->vm_pgoff << PAGE_SHIFT,
 		   MAJOR(dev), MINOR(dev), ino, &len);
 
 	if (file) {
diff --git a/include/linux/mm.h b/include/linux/mm.h
index aeabe95..bff1f0d 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1079,7 +1079,7 @@
 #endif
 
 /* nommu.c */
-extern atomic_t mmap_pages_allocated;
+extern atomic_long_t mmap_pages_allocated;
 
 /* prio_tree.c */
 void vma_prio_tree_add(struct vm_area_struct *, struct vm_area_struct *old);
diff --git a/kernel/fork.c b/kernel/fork.c
index 47c1584..51d1aa2 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1488,6 +1488,7 @@
 	mm_cachep = kmem_cache_create("mm_struct",
 			sizeof(struct mm_struct), ARCH_MIN_MMSTRUCT_ALIGN,
 			SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL);
+	vm_area_cachep = KMEM_CACHE(vm_area_struct, SLAB_PANIC);
 	mmap_init();
 }
 
diff --git a/mm/mmap.c b/mm/mmap.c
index 1abb918..4a38411 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -2481,7 +2481,4 @@
  */
 void __init mmap_init(void)
 {
-	vm_area_cachep = kmem_cache_create("vm_area_struct",
-			sizeof(struct vm_area_struct), 0,
-			SLAB_PANIC, NULL);
 }
diff --git a/mm/nommu.c b/mm/nommu.c
index 2fcf47d..72eda4a 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -69,7 +69,7 @@
 int sysctl_nr_trim_pages = 1; /* page trimming behaviour */
 int heap_stack_gap = 0;
 
-atomic_t mmap_pages_allocated;
+atomic_long_t mmap_pages_allocated;
 
 EXPORT_SYMBOL(mem_map);
 EXPORT_SYMBOL(num_physpages);
@@ -463,12 +463,7 @@
  */
 void __init mmap_init(void)
 {
-	vm_region_jar = kmem_cache_create("vm_region_jar",
-					  sizeof(struct vm_region), 0,
-					  SLAB_PANIC, NULL);
-	vm_area_cachep = kmem_cache_create("vm_area_struct",
-					   sizeof(struct vm_area_struct), 0,
-					   SLAB_PANIC, NULL);
+	vm_region_jar = KMEM_CACHE(vm_region, SLAB_PANIC);
 }
 
 /*
@@ -486,27 +481,24 @@
 		return;
 
 	last = rb_entry(lastp, struct vm_region, vm_rb);
-	if (unlikely(last->vm_end <= last->vm_start))
-		BUG();
-	if (unlikely(last->vm_top < last->vm_end))
-		BUG();
+	BUG_ON(unlikely(last->vm_end <= last->vm_start));
+	BUG_ON(unlikely(last->vm_top < last->vm_end));
 
 	while ((p = rb_next(lastp))) {
 		region = rb_entry(p, struct vm_region, vm_rb);
 		last = rb_entry(lastp, struct vm_region, vm_rb);
 
-		if (unlikely(region->vm_end <= region->vm_start))
-			BUG();
-		if (unlikely(region->vm_top < region->vm_end))
-			BUG();
-		if (unlikely(region->vm_start < last->vm_top))
-			BUG();
+		BUG_ON(unlikely(region->vm_end <= region->vm_start));
+		BUG_ON(unlikely(region->vm_top < region->vm_end));
+		BUG_ON(unlikely(region->vm_start < last->vm_top));
 
 		lastp = p;
 	}
 }
 #else
-#define validate_nommu_regions() do {} while(0)
+static void validate_nommu_regions(void)
+{
+}
 #endif
 
 /*
@@ -563,16 +555,17 @@
 		struct page *page = virt_to_page(from);
 
 		kdebug("- free %lx", from);
-		atomic_dec(&mmap_pages_allocated);
+		atomic_long_dec(&mmap_pages_allocated);
 		if (page_count(page) != 1)
-			kdebug("free page %p [%d]", page, page_count(page));
+			kdebug("free page %p: refcount not one: %d",
+			       page, page_count(page));
 		put_page(page);
 	}
 }
 
 /*
  * release a reference to a region
- * - the caller must hold the region semaphore, which this releases
+ * - the caller must hold the region semaphore for writing, which this releases
  * - the region may not have been added to the tree yet, in which case vm_top
  *   will equal vm_start
  */
@@ -1096,7 +1089,7 @@
 		goto enomem;
 
 	total = 1 << order;
-	atomic_add(total, &mmap_pages_allocated);
+	atomic_long_add(total, &mmap_pages_allocated);
 
 	point = rlen >> PAGE_SHIFT;
 
@@ -1107,7 +1100,7 @@
 			order = ilog2(total - point);
 			n = 1 << order;
 			kdebug("shave %lu/%lu @%lu", n, total - point, total);
-			atomic_sub(n, &mmap_pages_allocated);
+			atomic_long_sub(n, &mmap_pages_allocated);
 			total -= n;
 			set_page_refcounted(pages + total);
 			__free_pages(pages + total, order);
@@ -1536,10 +1529,15 @@
 	/* find the first potentially overlapping VMA */
 	vma = find_vma(mm, start);
 	if (!vma) {
-		printk(KERN_WARNING
-		       "munmap of memory not mmapped by process %d (%s):"
-		       " 0x%lx-0x%lx\n",
-		       current->pid, current->comm, start, start + len - 1);
+		static int limit = 0;
+		if (limit < 5) {
+			printk(KERN_WARNING
+			       "munmap of memory not mmapped by process %d"
+			       " (%s): 0x%lx-0x%lx\n",
+			       current->pid, current->comm,
+			       start, start + len - 1);
+			limit++;
+		}
 		return -EINVAL;
 	}