[PATCH 001/206] Staging: hv: Get rid of blkvsc_mutex

K. Y. Srinivasan
2011-05-09T21:44:44Z

The blkvsc_mutex is unnecessary as the state it is protecting
(blkdev->users) is already protected by the spin lock.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Abhishek Kane <v-abkane@microsoft.com>
Signed-off-by: Hank Janssen <hjanssen@microsoft.com>
---
drivers/staging/hv/blkvsc_drv.c | 5 -----
1 files changed, 0 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/hv/blkvsc_drv.c b/drivers/staging/hv/blkvsc_drv.c
index db44cf6..cfef1c0 100644
--- a/drivers/staging/hv/blkvsc_drv.c
+++ b/drivers/staging/hv/blkvsc_drv.c
@@ -27,7 +27,6 @@
#include <linux/major.h>
#include <linux/delay.h>
#include <linux/hdreg.h>
-#include <linux/mutex.h>
#include <linux/slab.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
@@ -113,8 +112,6 @@ struct block_device_context {
int users;
};

-static DEFINE_MUTEX(blkvsc_mutex);
-
static const char *g_blk_driver_name = "blkvsc";

/* {32412632-86cb-44a2-9b5c-50d1417354f5} */
@@ -620,7 +617,6 @@ static int blkvsc_release(struct gendisk *disk, fmode_t mode)
{
struct block_device_context *blkdev = disk->private_data;

- mutex_lock(&blkvsc_mutex);
spin_lock(&blkdev->lock);
if (blkdev->users == 1) {
spin_unlock(&blkdev->lock);
@@ -631,7 +627,6 @@ static int blkvsc_release(struct gendisk *disk, fmode_t mode)
blkdev->users--;

spin_unlock(&blkdev->lock);
- mutex_unlock(&blkvsc_mutex);
return 0;
}

--
1.7.4.1