1 files changed, 13 insertions, 7 deletions

diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 8c718a3d413f..98959b87cdf8 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -22,6 +22,7 @@
 #include <linux/backing-dev.h>
 #include <linux/hugetlb.h>
 #include <linux/pagevec.h>
+#include <linux/mman.h>
 #include <linux/quotaops.h>
 #include <linux/slab.h>
 #include <linux/dnotify.h>
@@ -98,10 +99,7 @@ out:
  * Called under down_write(mmap_sem).
  */
 
-#ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA
-unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
-                unsigned long len, unsigned long pgoff, unsigned long flags);
-#else
+#ifndef HAVE_ARCH_HUGETLB_UNMAPPED_AREA
 static unsigned long
 hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
                 unsigned long len, unsigned long pgoff, unsigned long flags)
@@ -115,6 +113,12 @@ hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
         if (len > TASK_SIZE)
                 return -ENOMEM;
 
+        if (flags & MAP_FIXED) {
+                if (prepare_hugepage_range(addr, len, pgoff))
+                        return -EINVAL;
+                return addr;
+        }
+
         if (addr) {
                 addr = ALIGN(addr, HPAGE_SIZE);
                 vma = find_vma(mm, addr);
@@ -453,7 +457,7 @@ static int hugetlbfs_symlink(struct inode *dir,
  */
 static int hugetlbfs_set_page_dirty(struct page *page)
 {
-        struct page *head = (struct page *)page_private(page);
+        struct page *head = compound_head(page);
 
         SetPageDirty(head);
         return 0;
@@ -552,8 +556,7 @@ static void init_once(void *foo, struct kmem_cache *cachep, unsigned long flags)
 {
         struct hugetlbfs_inode_info *ei = (struct hugetlbfs_inode_info *)foo;
 
-        if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
-            SLAB_CTOR_CONSTRUCTOR)
+        if (flags & SLAB_CTOR_CONSTRUCTOR)
                 inode_init_once(&ei->vfs_inode);
 }
 
@@ -744,6 +747,9 @@ struct file *hugetlb_zero_setup(size_t size)
         char buf[16];
         static atomic_t counter;
 
+        if (!hugetlbfs_vfsmount)
+                return ERR_PTR(-ENOENT);
+
         if (!can_do_hugetlb_shm())
                 return ERR_PTR(-EPERM);