1 files changed, 4 insertions, 0 deletions

diff --git a/include/linux/swap.h b/include/linux/swap.h
index b6661933e252..c84ec68eaec9 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -197,6 +197,10 @@ struct swap_info_struct {
         struct block_device *bdev;      /* swap device or bdev of swap file */
         struct file *swap_file;         /* seldom referenced */
         unsigned int old_block_size;    /* seldom referenced */
+#ifdef CONFIG_FRONTSWAP
+        unsigned long *frontswap_map;   /* frontswap in-use, one bit per page */
+        atomic_t frontswap_pages;       /* frontswap pages in-use counter */
+#endif
 };
 
 struct swap_list_t {