omap: mailbox: convert block api to kfifo

The underlying buffering implementation of mailbox
is converted from block API to kfifo due to the simplicity
and speed of kfifo.

The default size of the kfifo buffer is set to 256 bytes.
This value is configurable at compile time (via
CONFIG_OMAP_MBOX_KFIFO_SIZE), and can be changed at
runtime (via the mbox_kfifo_size module parameter).

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Signed-off-by: Hari Kanigeri <h-kanigeri2@ti.com>
Signed-off-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/arch/arm/plat-omap/include/plat/mailbox.h b/arch/arm/plat-omap/include/plat/mailbox.h
index 729166b76a7c..0c3c4a5f4b42 100644
--- a/arch/arm/plat-omap/include/plat/mailbox.h
+++ b/arch/arm/plat-omap/include/plat/mailbox.h
@@ -5,8 +5,8 @@
 
 #include <linux/wait.h>
 #include <linux/workqueue.h>
-#include <linux/blkdev.h>
 #include <linux/interrupt.h>
+#include <linux/kfifo.h>
 
 typedef u32 mbox_msg_t;
 struct omap_mbox;
@@ -42,7 +42,7 @@ struct omap_mbox_ops {
 
 struct omap_mbox_queue {
         spinlock_t              lock;
-        struct request_queue    *queue;
+        struct kfifo            fifo;
         struct work_struct      work;
         struct tasklet_struct   tasklet;
         int     (*callback)(void *);