mmc: replace host->card_busy

As card_busy was only used to indicate if the host was exclusively
claimed and not really used to identify a particular card, replacing
it with just a boolean makes things a lot more easily understandable.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>

1 files changed, 3 insertions, 2 deletions

diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index c15ae1986b..dc4c6e3951 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -106,8 +106,9 @@ struct mmc_host {
         struct list_head        cards;          /* devices attached to this host */
 
         wait_queue_head_t       wq;
-        spinlock_t              lock;           /* card_busy lock */
-        struct mmc_card         *card_busy;     /* the MMC card claiming host */
+        spinlock_t              lock;           /* claimed lock */
+        unsigned int            claimed:1;      /* host exclusively claimed */
+
         struct mmc_card         *card_selected; /* the selected MMC card */
 
         struct delayed_work     detect;