[PATCH] USB: convert a bunch of USB semaphores to mutexes
the patch below converts a bunch of semaphores-used-as-mutex in the USB
code to mutexes
Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/media/sn9c102.h b/drivers/usb/media/sn9c102.h
index 17d60c1..59e44be 100644
--- a/drivers/usb/media/sn9c102.h
+++ b/drivers/usb/media/sn9c102.h
@@ -33,6 +33,7 @@
#include <linux/types.h>
#include <linux/param.h>
#include <linux/rwsem.h>
+#include <linux/mutex.h>
#include <asm/semaphore.h>
#include "sn9c102_sensor.h"
@@ -109,7 +110,7 @@
u8 force_munmap;
};
-static DECLARE_MUTEX(sn9c102_sysfs_lock);
+static DEFINE_MUTEX(sn9c102_sysfs_lock);
static DECLARE_RWSEM(sn9c102_disconnect);
struct sn9c102_device {
@@ -141,7 +142,7 @@
enum sn9c102_dev_state state;
u8 users;
- struct semaphore dev_sem, fileop_sem;
+ struct mutex dev_mutex, fileop_mutex;
spinlock_t queue_lock;
wait_queue_head_t open, wait_frame, wait_stream;
};