1 files changed, 50 insertions, 6 deletions

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 9f909622a25e..a3d66b3dc5cb 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -293,13 +293,13 @@ static void __insert_vmap_area(struct vmap_area *va)
         struct rb_node *tmp;
 
         while (*p) {
-                struct vmap_area *tmp;
+                struct vmap_area *tmp_va;
 
                 parent = *p;
-                tmp = rb_entry(parent, struct vmap_area, rb_node);
-                if (va->va_start < tmp->va_end)
+                tmp_va = rb_entry(parent, struct vmap_area, rb_node);
+                if (va->va_start < tmp_va->va_end)
                         p = &(*p)->rb_left;
-                else if (va->va_end > tmp->va_start)
+                else if (va->va_end > tmp_va->va_start)
                         p = &(*p)->rb_right;
                 else
                         BUG();
@@ -1596,6 +1596,13 @@ void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot)
 }
 EXPORT_SYMBOL(__vmalloc);
 
+static inline void *__vmalloc_node_flags(unsigned long size,
+                                        int node, gfp_t flags)
+{
+        return __vmalloc_node(size, 1, flags, PAGE_KERNEL,
+                                        node, __builtin_return_address(0));
+}
+
 /**
  *      vmalloc  -  allocate virtually contiguous memory
  *      @size:          allocation size
@@ -1607,12 +1614,28 @@ EXPORT_SYMBOL(__vmalloc);
  */
 void *vmalloc(unsigned long size)
 {
-        return __vmalloc_node(size, 1, GFP_KERNEL | __GFP_HIGHMEM, PAGE_KERNEL,
-                                        -1, __builtin_return_address(0));
+        return __vmalloc_node_flags(size, -1, GFP_KERNEL | __GFP_HIGHMEM);
 }
 EXPORT_SYMBOL(vmalloc);
 
 /**
+ *      vzalloc - allocate virtually contiguous memory with zero fill
+ *      @size:  allocation size
+ *      Allocate enough pages to cover @size from the page level
+ *      allocator and map them into contiguous kernel virtual space.
+ *      The memory allocated is set to zero.
+ *
+ *      For tight control over page level allocator and protection flags
+ *      use __vmalloc() instead.
+ */
+void *vzalloc(unsigned long size)
+{
+        return __vmalloc_node_flags(size, -1,
+                                GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO);
+}
+EXPORT_SYMBOL(vzalloc);
+
+/**
  * vmalloc_user - allocate zeroed virtually contiguous memory for userspace
  * @size: allocation size
  *
@@ -1653,6 +1676,25 @@ void *vmalloc_node(unsigned long size, int node)
 }
 EXPORT_SYMBOL(vmalloc_node);
 
+/**
+ * vzalloc_node - allocate memory on a specific node with zero fill
+ * @size:       allocation size
+ * @node:       numa node
+ *
+ * Allocate enough pages to cover @size from the page level
+ * allocator and map them into contiguous kernel virtual space.
+ * The memory allocated is set to zero.
+ *
+ * For tight control over page level allocator and protection flags
+ * use __vmalloc_node() instead.
+ */
+void *vzalloc_node(unsigned long size, int node)
+{
+        return __vmalloc_node_flags(size, node,
+                         GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO);
+}
+EXPORT_SYMBOL(vzalloc_node);
+
 #ifndef PAGE_KERNEL_EXEC
 # define PAGE_KERNEL_EXEC PAGE_KERNEL
 #endif
@@ -2350,6 +2392,7 @@ void pcpu_free_vm_areas(struct vm_struct **vms, int nr_vms)
 
 #ifdef CONFIG_PROC_FS
 static void *s_start(struct seq_file *m, loff_t *pos)
+        __acquires(&vmlist_lock)
 {
         loff_t n = *pos;
         struct vm_struct *v;
@@ -2376,6 +2419,7 @@ static void *s_next(struct seq_file *m, void *p, loff_t *pos)
 }
 
 static void s_stop(struct seq_file *m, void *p)
+        __releases(&vmlist_lock)
 {
         read_unlock(&vmlist_lock);
 }