X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=mm%2Fvmalloc.c;h=9eef486da9093469fa6a101b05be786a02f0ed14;hb=412ecd7751a2653ab17df39a1dc3565a548633fd;hp=46606c133e824ea4a12f8ae7ca818c333a938628;hpb=752c58a471c108d64da1676b2925dfbd83eb177e;p=powerpc.git

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 46606c133e..9eef486da9 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -181,16 +181,13 @@ static struct vm_struct *__get_vm_area_node(unsigned long size, unsigned long fl
 	}
 	addr = ALIGN(start, align);
 	size = PAGE_ALIGN(size);
+	if (unlikely(!size))
+		return NULL;
 
 	area = kmalloc_node(sizeof(*area), gfp_mask & GFP_LEVEL_MASK, node);
 	if (unlikely(!area))
 		return NULL;
 
-	if (unlikely(!size)) {
-		kfree (area);
-		return NULL;
-	}
-
 	/*
 	 * We always allocate a guard page.
 	 */
@@ -532,11 +529,12 @@ void *vmalloc_user(unsigned long size)
 	void *ret;
 
 	ret = __vmalloc(size, GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO, PAGE_KERNEL);
-	write_lock(&vmlist_lock);
-	area = __find_vm_area(ret);
-	area->flags |= VM_USERMAP;
-	write_unlock(&vmlist_lock);
-
+	if (ret) {
+		write_lock(&vmlist_lock);
+		area = __find_vm_area(ret);
+		area->flags |= VM_USERMAP;
+		write_unlock(&vmlist_lock);
+	}
 	return ret;
 }
 EXPORT_SYMBOL(vmalloc_user);
@@ -605,11 +603,12 @@ void *vmalloc_32_user(unsigned long size)
 	void *ret;
 
 	ret = __vmalloc(size, GFP_KERNEL | __GFP_ZERO, PAGE_KERNEL);
-	write_lock(&vmlist_lock);
-	area = __find_vm_area(ret);
-	area->flags |= VM_USERMAP;
-	write_unlock(&vmlist_lock);
-
+	if (ret) {
+		write_lock(&vmlist_lock);
+		area = __find_vm_area(ret);
+		area->flags |= VM_USERMAP;
+		write_unlock(&vmlist_lock);
+	}
 	return ret;
 }
 EXPORT_SYMBOL(vmalloc_32_user);
@@ -700,7 +699,7 @@ finished:
  *	that it is big enough to cover the vma. Will return failure if
  *	that criteria isn't met.
  *
- *	Similar to remap_pfn_range (see mm/memory.c)
+ *	Similar to remap_pfn_range() (see mm/memory.c)
  */
 int remap_vmalloc_range(struct vm_area_struct *vma, void *addr,
 						unsigned long pgoff)