mtd: Remove redundant mutex from mtd_blkdevs.c

In commit 2a48fc0ab24241755dc93bfd4f01d68efab47f5a ('block: autoconvert
trivial BKL users to private mutex'), Arnd replaced the BKL usage with a
mutex. However, Maxim has already provided a better fix in commit
480792b7bf188c29b8d4b10fee65c3a06ec5dbf7 ('mtd: blktrans: kill BKL'),
which was simply to remove the BKL without replacing it — since he'd
already made it do all necessary locking for itself.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c
index f932979..cb20c67 100644 (file)
--- a/drivers/mtd/mtd_blkdevs.c
+++ b/drivers/mtd/mtd_blkdevs.c
@@ -37,7 +37,6 @@
 
 #include "mtdcore.h"
 
-static DEFINE_MUTEX(mtd_blkdevs_mutex);
 static LIST_HEAD(blktrans_majors);
 static DEFINE_MUTEX(blktrans_ref_mutex);
 
@@ -185,7 +184,6 @@ static int blktrans_open(struct block_device *bdev, fmode_t mode)
        if (!dev)
                return -ERESTARTSYS; /* FIXME: busy loop! -arnd*/
 
-       mutex_lock(&mtd_blkdevs_mutex);
        mutex_lock(&dev->lock);
 
        if (dev->open++)
@@ -202,7 +200,6 @@ static int blktrans_open(struct block_device *bdev, fmode_t mode)
 unlock:
        mutex_unlock(&dev->lock);
        blktrans_dev_put(dev);
-       mutex_unlock(&mtd_blkdevs_mutex);
        return ret;
 }
 
@@ -214,7 +211,6 @@ static int blktrans_release(struct gendisk *disk, fmode_t mode)
        if (!dev)
                return ret;
 
-       mutex_lock(&mtd_blkdevs_mutex);
        mutex_lock(&dev->lock);
 
        if (--dev->open)
@@ -230,7 +226,6 @@ static int blktrans_release(struct gendisk *disk, fmode_t mode)
 unlock:
        mutex_unlock(&dev->lock);
        blktrans_dev_put(dev);
-       mutex_unlock(&mtd_blkdevs_mutex);
        return ret;
 }
 
@@ -263,7 +258,6 @@ static int blktrans_ioctl(struct block_device *bdev, fmode_t mode,
        if (!dev)
                return ret;
 
-       mutex_lock(&mtd_blkdevs_mutex);
        mutex_lock(&dev->lock);
 
        if (!dev->mtd)
@@ -278,7 +272,6 @@ static int blktrans_ioctl(struct block_device *bdev, fmode_t mode,
        }
 unlock:
        mutex_unlock(&dev->lock);
-       mutex_unlock(&mtd_blkdevs_mutex);
        blktrans_dev_put(dev);
        return ret;
 }