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path: root/drivers/s390/char/tape_block.c
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Diffstat (limited to 'drivers/s390/char/tape_block.c')
-rw-r--r--drivers/s390/char/tape_block.c13
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/s390/char/tape_block.c b/drivers/s390/char/tape_block.c
index 85cf607..f0fa9ca 100644
--- a/drivers/s390/char/tape_block.c
+++ b/drivers/s390/char/tape_block.c
@@ -16,7 +16,7 @@
#include <linux/fs.h>
#include <linux/module.h>
#include <linux/blkdev.h>
-#include <linux/smp_lock.h>
+#include <linux/mutex.h>
#include <linux/interrupt.h>
#include <linux/buffer_head.h>
#include <linux/kernel.h>
@@ -45,6 +45,7 @@
/*
* file operation structure for tape block frontend
*/
+static DEFINE_MUTEX(tape_block_mutex);
static int tapeblock_open(struct block_device *, fmode_t);
static int tapeblock_release(struct gendisk *, fmode_t);
static int tapeblock_medium_changed(struct gendisk *);
@@ -361,7 +362,7 @@ tapeblock_open(struct block_device *bdev, fmode_t mode)
struct tape_device * device;
int rc;
- lock_kernel();
+ mutex_lock(&tape_block_mutex);
device = tape_get_device(disk->private_data);
if (device->required_tapemarks) {
@@ -385,14 +386,14 @@ tapeblock_open(struct block_device *bdev, fmode_t mode)
* is called.
*/
tape_state_set(device, TS_BLKUSE);
- unlock_kernel();
+ mutex_unlock(&tape_block_mutex);
return 0;
release:
tape_release(device);
put_device:
tape_put_device(device);
- unlock_kernel();
+ mutex_unlock(&tape_block_mutex);
return rc;
}
@@ -407,11 +408,11 @@ tapeblock_release(struct gendisk *disk, fmode_t mode)
{
struct tape_device *device = disk->private_data;
- lock_kernel();
+ mutex_lock(&tape_block_mutex);
tape_state_set(device, TS_IN_USE);
tape_release(device);
tape_put_device(device);
- unlock_kernel();
+ mutex_unlock(&tape_block_mutex);
return 0;
}
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