Previous commits removed page_ext_next() use from page_ext clients. Make
it private.

Fixes: cf54f310d0d3 ("mm/hugetlb: use __GFP_COMP for gigantic folios")
Signed-off-by: Luiz Capitulino <luizcap@redhat.com>
---
 include/linux/page_ext.h | 7 -------
 mm/page_ext.c            | 7 +++++++
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/include/linux/page_ext.h b/include/linux/page_ext.h
index a99da12e59fa7..3a4f0f825aa59 100644
--- a/include/linux/page_ext.h
+++ b/include/linux/page_ext.h
@@ -101,13 +101,6 @@ static inline void *page_ext_data(struct page_ext *page_ext,
 	return (void *)(page_ext) + ops->offset;
 }
 
-static inline struct page_ext *page_ext_next(struct page_ext *curr)
-{
-	void *next = curr;
-	next += page_ext_size;
-	return next;
-}
-
 struct page_ext_iter {
 	unsigned long pfn;
 	unsigned long index;
diff --git a/mm/page_ext.c b/mm/page_ext.c
index 508deb04d5ead..f9e515d353005 100644
--- a/mm/page_ext.c
+++ b/mm/page_ext.c
@@ -567,6 +567,13 @@ struct page_ext *page_ext_iter_begin(struct page_ext_iter *iter, struct page *pa
 	return iter->page_ext;
 }
 
+static struct page_ext *page_ext_next(struct page_ext *curr)
+{
+	void *next = curr;
+	next += page_ext_size;
+	return next;
+}
+
 /**
  * page_ext_iter_next() - Get next page extension
  * @iter: page extension iterator.
-- 
2.48.1