diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 338a9b3..631a2fe 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -182,6 +182,8 @@
 	struct mmc_card		*card;		/* device attached to this host */
 
 	wait_queue_head_t	wq;
+	struct task_struct	*claimer;	/* task that has host claimed */
+	int			claim_cnt;	/* "claim" nesting count */
 
 	struct delayed_work	detect;