mm: memcg: add swapcache stat for memcg v2

[platform/kernel/linux-starfive.git] / include / linux / swap.h

diff --git a/include/linux/swap.h b/include/linux/swap.h
index 3f1f7ae..0d64a2b 100644 (file)
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -408,7 +408,11 @@ extern struct address_space *swapper_spaces[];
 #define swap_address_space(entry)                          \
        (&swapper_spaces[swp_type(entry)][swp_offset(entry) \
                >> SWAP_ADDRESS_SPACE_SHIFT])
-extern unsigned long total_swapcache_pages(void);
+static inline unsigned long total_swapcache_pages(void)
+{
+       return global_node_page_state(NR_SWAPCACHE);
+}
+
 extern void show_swap_cache_info(void);
 extern int add_to_swap(struct page *page);
 extern void *get_shadow_from_swap_cache(swp_entry_t entry);