diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index 831e8b654ab8179dc3f42f038ba755fc34e74eaa..6831b24defd6411f7f83e0445f2f16d881b623d1 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -485,17 +485,6 @@ static inline int hstate_index(struct hstate *h)
 	return h - hstates;
 }
 
-pgoff_t __basepage_index(struct page *page);
-
-/* Return page->index in PAGE_SIZE units */
-static inline pgoff_t basepage_index(struct page *page)
-{
-	if (!PageCompound(page))
-		return page->index;
-
-	return __basepage_index(page);
-}
-
 extern int dissolve_free_huge_page(struct page *page);
 extern int dissolve_free_huge_pages(unsigned long start_pfn,
 				    unsigned long end_pfn);
@@ -590,11 +579,6 @@ static inline int hstate_index(struct hstate *h)
 	return 0;
 }
 
-static inline pgoff_t basepage_index(struct page *page)
-{
-	return page->index;
-}
-
 static inline int dissolve_free_huge_page(struct page *page)
 {
 	return 0;
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index e889d992961592f2b70a1b7595aaf170fd40ffdc..085aed892ce5812b774046cc601f09caf5915c13 100644
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -427,7 +427,7 @@ static inline struct page *read_mapping_page(struct address_space *mapping,
 }
 
 /*
- * Get index of the page with in radix-tree
+ * Get index of the page within radix-tree (but not for hugetlb pages).
  * (TODO: remove once hugetlb pages will have ->index in PAGE_SIZE)
  */
 static inline pgoff_t page_to_index(struct page *page)
@@ -446,15 +446,16 @@ static inline pgoff_t page_to_index(struct page *page)
 	return pgoff;
 }
 
+extern pgoff_t hugetlb_basepage_index(struct page *page);
+
 /*
- * Get the offset in PAGE_SIZE.
- * (TODO: hugepage should have ->index in PAGE_SIZE)
+ * Get the offset in PAGE_SIZE (even for hugetlb pages).
+ * (TODO: hugetlb pages should have ->index in PAGE_SIZE)
  */
 static inline pgoff_t page_to_pgoff(struct page *page)
 {
-	if (unlikely(PageHeadHuge(page)))
-		return page->index << compound_order(page);
-
+	if (unlikely(PageHuge(page)))
+		return hugetlb_basepage_index(page);
 	return page_to_index(page);
 }
 
diff --git a/kernel/futex.c b/kernel/futex.c
index 13574134bbc44d846d252aab6a8fda2f2ee79bdc..a36a006e5b13814d2db6c3070425dfb2e5afb6bc 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -724,7 +724,7 @@ get_futex_key(u32 __user *uaddr, int fshared, union futex_key *key, enum futex_a
 
 		key->both.offset |= FUT_OFF_INODE; /* inode-based key */
 		key->shared.i_seq = get_inode_sequence_number(inode);
-		key->shared.pgoff = basepage_index(tail);
+		key->shared.pgoff = page_to_pgoff(tail);
 		rcu_read_unlock();
 	}
 
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 27d03b7197eea6f7d240970dffbdae479333b791..5132fefb60c86a277b550c298acdcfadbf9d7de6 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -1409,15 +1409,12 @@ int PageHeadHuge(struct page *page_head)
 	return get_compound_page_dtor(page_head) == free_huge_page;
 }
 
-pgoff_t __basepage_index(struct page *page)
+pgoff_t hugetlb_basepage_index(struct page *page)
 {
 	struct page *page_head = compound_head(page);
 	pgoff_t index = page_index(page_head);
 	unsigned long compound_idx;
 
-	if (!PageHuge(page_head))
-		return page_index(page);
-
 	if (compound_order(page_head) >= MAX_ORDER)
 		compound_idx = page_to_pfn(page) - page_to_pfn(page_head);
 	else