In preparation for extending vma_alloc_zeroed_movable_folio() to
allocate a arbitrary order folio, expose clear_huge_page()
unconditionally, so that it can be used to zero the allocated folio.
Signed-off-by: Ryan Roberts <ryan.roberts@xxxxxxx>
---
include/linux/mm.h | 3 ++-
mm/memory.c | 3 ++-
2 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 1f79667824eb..cdb8c6031d0f 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -3538,10 +3538,11 @@ enum mf_action_page_type {
*/
extern const struct attribute_group memory_failure_attr_group;
-#if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_HUGETLBFS)
extern void clear_huge_page(struct page *page,
unsigned long addr_hint,
unsigned int pages_per_huge_page);
+
+#if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_HUGETLBFS)
extern void copy_user_huge_page(struct page *dst, struct page *src,
unsigned long addr_hint,
struct vm_area_struct *vma,
diff --git a/mm/memory.c b/mm/memory.c
index 01a23ad48a04..3e2eee8c66a7 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -5642,7 +5642,6 @@ void __might_fault(const char *file, int line)
EXPORT_SYMBOL(__might_fault);
#endif
-#if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_HUGETLBFS)
/*
* Process all subpages of the specified huge page with the specified
* operation. The target subpage will be processed last to keep its
@@ -5730,6 +5729,8 @@ void clear_huge_page(struct page *page,
process_huge_page(addr_hint, pages_per_huge_page, clear_subpage, page);
}
+#if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_HUGETLBFS)
+
static void copy_user_gigantic_page(struct page *dst, struct page *src,
unsigned long addr,
struct vm_area_struct *vma,
--
2.25.1
