[SCSI] turn most scsi semaphores into mutexes
the scsi layer is using semaphores in a mutex way, this patch converts
these into using mutexes instead
Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
index a4d9be7..ec73223 100644
--- a/drivers/scsi/sr.c
+++ b/drivers/scsi/sr.c
@@ -44,6 +44,7 @@
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/blkdev.h>
+#include <linux/mutex.h>
#include <asm/uaccess.h>
#include <scsi/scsi.h>
@@ -90,7 +91,7 @@
/* This semaphore is used to mediate the 0->1 reference get in the
* face of object destruction (i.e. we can't allow a get on an
* object after last put) */
-static DECLARE_MUTEX(sr_ref_sem);
+static DEFINE_MUTEX(sr_ref_mutex);
static int sr_open(struct cdrom_device_info *, int);
static void sr_release(struct cdrom_device_info *);
@@ -133,7 +134,7 @@
{
struct scsi_cd *cd = NULL;
- down(&sr_ref_sem);
+ mutex_lock(&sr_ref_mutex);
if (disk->private_data == NULL)
goto out;
cd = scsi_cd(disk);
@@ -146,7 +147,7 @@
kref_put(&cd->kref, sr_kref_release);
cd = NULL;
out:
- up(&sr_ref_sem);
+ mutex_unlock(&sr_ref_mutex);
return cd;
}
@@ -154,10 +155,10 @@
{
struct scsi_device *sdev = cd->device;
- down(&sr_ref_sem);
+ mutex_lock(&sr_ref_mutex);
kref_put(&cd->kref, sr_kref_release);
scsi_device_put(sdev);
- up(&sr_ref_sem);
+ mutex_unlock(&sr_ref_mutex);
}
/*
@@ -845,7 +846,7 @@
* sr_kref_release - Called to free the scsi_cd structure
* @kref: pointer to embedded kref
*
- * sr_ref_sem must be held entering this routine. Because it is
+ * sr_ref_mutex must be held entering this routine. Because it is
* called on last put, you should always use the scsi_cd_get()
* scsi_cd_put() helpers which manipulate the semaphore directly
* and never do a direct kref_put().
@@ -874,9 +875,9 @@
del_gendisk(cd->disk);
- down(&sr_ref_sem);
+ mutex_lock(&sr_ref_mutex);
kref_put(&cd->kref, sr_kref_release);
- up(&sr_ref_sem);
+ mutex_unlock(&sr_ref_mutex);
return 0;
}