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Diffstat (limited to 'drivers/i2c/i2c-core.h')
-rw-r--r--drivers/i2c/i2c-core.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/i2c/i2c-core.h b/drivers/i2c/i2c-core.h
index cd5bff874855..9f9c57ff6708 100644
--- a/drivers/i2c/i2c-core.h
+++ b/drivers/i2c/i2c-core.h
@@ -16,6 +16,8 @@
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
+#include <linux/rwsem.h>
+
struct i2c_devinfo {
struct list_head list;
int busnum;
@@ -25,7 +27,7 @@ struct i2c_devinfo {
/* board_lock protects board_list and first_dynamic_bus_num.
* only i2c core components are allowed to use these symbols.
*/
-extern struct mutex __i2c_board_lock;
+extern struct rw_semaphore __i2c_board_lock;
extern struct list_head __i2c_board_list;
extern int __i2c_first_dynamic_bus_num;