diff --git a/fs/gfs2/ops_file.c b/fs/gfs2/ops_file.c
index 1a5e8e8..bad0b24 100644
--- a/fs/gfs2/ops_file.c
+++ b/fs/gfs2/ops_file.c
@@ -364,6 +364,8 @@
 	else
 		vma->vm_ops = &gfs2_vm_ops_private;
 
+	vma->vm_flags |= VM_CAN_INVALIDATE;
+
 	gfs2_glock_dq_uninit(&i_gh);
 
 	return error;
diff --git a/fs/gfs2/ops_vm.c b/fs/gfs2/ops_vm.c
index 404b7cc..d5a98cb 100644
--- a/fs/gfs2/ops_vm.c
+++ b/fs/gfs2/ops_vm.c
@@ -138,6 +138,8 @@
 	if (alloc_required) {
 		error = alloc_page_backing(ip, result);
 		if (error) {
+			if (area->vm_flags & VM_CAN_INVALIDATE)
+				unlock_page(result);
 			page_cache_release(result);
 			result = NULL;
 			goto out;
diff --git a/fs/ncpfs/mmap.c b/fs/ncpfs/mmap.c
index 70a6911..5416673 100644
--- a/fs/ncpfs/mmap.c
+++ b/fs/ncpfs/mmap.c
@@ -123,6 +123,7 @@
 		return -EFBIG;
 
 	vma->vm_ops = &ncp_file_mmap;
+	vma->vm_flags |= VM_CAN_INVALIDATE;
 	file_accessed(file);
 	return 0;
 }
diff --git a/fs/ocfs2/mmap.c b/fs/ocfs2/mmap.c
index d79aa12..904f39f 100644
--- a/fs/ocfs2/mmap.c
+++ b/fs/ocfs2/mmap.c
@@ -226,6 +226,7 @@
 	ocfs2_meta_unlock(file->f_dentry->d_inode, lock_level);
 out:
 	vma->vm_ops = &ocfs2_file_vm_ops;
+	vma->vm_flags |= VM_CAN_INVALIDATE;
 	return 0;
 }
 
diff --git a/fs/xfs/linux-2.6/xfs_file.c b/fs/xfs/linux-2.6/xfs_file.c
index cbcd40c..92b2f22 100644
--- a/fs/xfs/linux-2.6/xfs_file.c
+++ b/fs/xfs/linux-2.6/xfs_file.c
@@ -310,6 +310,7 @@
 	struct vm_area_struct *vma)
 {
 	vma->vm_ops = &xfs_file_vm_ops;
+	vma->vm_flags |= VM_CAN_INVALIDATE;
 
 #ifdef CONFIG_XFS_DMAPI
 	if (vn_from_inode(filp->f_path.dentry->d_inode)->v_vfsp->vfs_flag & VFS_DMI)