The next commit will use it.
Signed-off-by: Luiz Capitulino <luizcap@xxxxxxxxxx>
---
include/linux/page_ext.h | 1 +
mm/page_ext.c | 4 ++--
2 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/include/linux/page_ext.h b/include/linux/page_ext.h
index e4b48a0dda244..d6fb891c51d1d 100644
--- a/include/linux/page_ext.h
+++ b/include/linux/page_ext.h
@@ -79,6 +79,7 @@ static inline void page_ext_init(void)
extern struct page_ext *page_ext_get(const struct page *page);
extern void page_ext_put(struct page_ext *page_ext);
+extern struct page_ext *lookup_page_ext(const struct page *page);
static inline void *page_ext_data(struct page_ext *page_ext,
struct page_ext_operations *ops)
diff --git a/mm/page_ext.c b/mm/page_ext.c
index 641d93f6af4c1..23ad30597c05c 100644
--- a/mm/page_ext.c
+++ b/mm/page_ext.c
@@ -165,7 +165,7 @@ void __meminit pgdat_page_ext_init(struct pglist_data *pgdat)
pgdat->node_page_ext = NULL;
}
-static struct page_ext *lookup_page_ext(const struct page *page)
+struct page_ext *lookup_page_ext(const struct page *page)
{
unsigned long pfn = page_to_pfn(page);
unsigned long index;
@@ -245,7 +245,7 @@ static bool page_ext_invalid(struct page_ext *page_ext)
return !page_ext || (((unsigned long)page_ext & PAGE_EXT_INVALID) == PAGE_EXT_INVALID);
}
-static struct page_ext *lookup_page_ext(const struct page *page)
+struct page_ext *lookup_page_ext(const struct page *page)
{
unsigned long pfn = page_to_pfn(page);
struct mem_section *section = __pfn_to_section(pfn);
--
2.48.1
