mm: /proc/pid/smaps:: show proportional swap share of the mapping

[karo-tx-linux.git] / include / linux / swap.h

diff --git a/include/linux/swap.h b/include/linux/swap.h
index 31496d201fdc0d966fd7ff6b6323219f6a1de760..6282f1eb3d6a3f179fc070f03ea80605d8c530aa 100644 (file)
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -431,6 +431,7 @@ extern unsigned int count_swap_pages(int, int);
 extern sector_t map_swap_page(struct page *, struct block_device **);
 extern sector_t swapdev_block(int, pgoff_t);
 extern int page_swapcount(struct page *);
+extern int swp_swapcount(swp_entry_t entry);
 extern struct swap_info_struct *page_swap_info(struct page *);
 extern int reuse_swap_page(struct page *);
 extern int try_to_free_swap(struct page *);
@@ -522,6 +523,11 @@ static inline int page_swapcount(struct page *page)
        return 0;
 }
 
+static inline int swp_swapcount(swp_entry_t entry)
+{
+       return 0;
+}
+
 #define reuse_swap_page(page)  (page_mapcount(page) == 1)
 
 static inline int try_to_free_swap(struct page *page)