[PATCH] mm, hugetlbfs: include mm.h for vm_operations_struct

[Arnd Bergmann <arnd@arndb.de>]

The infiniband umem code causes a build failure in some configurations:

In file included from drivers/infiniband/core/umem_odp.c:41:0:
include/linux/hugetlb.h: In function 'vma_kernel_pagesize':
include/linux/hugetlb.h:262:32: error: dereferencing pointer to incomplete type 'const struct vm_operations_struct'

Including the header file that defines the structure is sufficient to
avoid this.

Fixes: ac9284a6b670 ("mm, hugetlbfs: introduce ->pagesize() to vm_operations_struct")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 include/linux/hugetlb.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index b0f1f6768336..082ff47201be 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -9,6 +9,7 @@
 #include <linux/cgroup.h>
 #include <linux/list.h>
 #include <linux/kref.h>
+#include <linux/mm.h>
 #include <asm/pgtable.h>
 
 struct ctl_table;
-- 
2.9.0