[PATCH] hugetlb: fix build issue for missing hugetlb_vma_lock_release

[Mike Kravetz]

Add a stub for hugetlb_vma_lock_release to build in the case
CONFIG_HUGETLB_PAGE && !CONFIG_ARCH_WANT_HUGE_PMD_SHARE.

Signed-off-by: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
---
 mm/hugetlb.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 2207300791e5..cc7877da18d7 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -7008,6 +7008,10 @@ void hugetlb_vma_assert_locked(struct vm_area_struct *vma)
 {
 }
 
+void hugetlb_vma_lock_release(struct kref *kref)
+{
+}
+
 static void hugetlb_vma_lock_free(struct vm_area_struct *vma)
 {
 }
-- 
2.37.2