[S390] dasd_eer: use mutex instead of semaphore
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/drivers/s390/block/dasd_eer.c b/drivers/s390/block/dasd_eer.c
index a1dc8c4..0c081a6 100644
--- a/drivers/s390/block/dasd_eer.c
+++ b/drivers/s390/block/dasd_eer.c
@@ -14,9 +14,9 @@
#include <linux/moduleparam.h>
#include <linux/device.h>
#include <linux/poll.h>
+#include <linux/mutex.h>
#include <asm/uaccess.h>
-#include <asm/semaphore.h>
#include <asm/atomic.h>
#include <asm/ebcdic.h>
@@ -514,7 +514,7 @@
* to transfer in a readbuffer, which is protected by the readbuffer_mutex.
*/
static char readbuffer[PAGE_SIZE];
-static DECLARE_MUTEX(readbuffer_mutex);
+static DEFINE_MUTEX(readbuffer_mutex);
static int dasd_eer_open(struct inode *inp, struct file *filp)
{
@@ -579,7 +579,7 @@
struct eerbuffer *eerb;
eerb = (struct eerbuffer *) filp->private_data;
- if (down_interruptible(&readbuffer_mutex))
+ if (mutex_lock_interruptible(&readbuffer_mutex))
return -ERESTARTSYS;
spin_lock_irqsave(&bufferlock, flags);
@@ -588,7 +588,7 @@
/* has been deleted */
eerb->residual = 0;
spin_unlock_irqrestore(&bufferlock, flags);
- up(&readbuffer_mutex);
+ mutex_unlock(&readbuffer_mutex);
return -EIO;
} else if (eerb->residual > 0) {
/* OK we still have a second half of a record to deliver */
@@ -602,7 +602,7 @@
if (!tc) {
/* no data available */
spin_unlock_irqrestore(&bufferlock, flags);
- up(&readbuffer_mutex);
+ mutex_unlock(&readbuffer_mutex);
if (filp->f_flags & O_NONBLOCK)
return -EAGAIN;
rc = wait_event_interruptible(
@@ -610,7 +610,7 @@
eerb->head != eerb->tail);
if (rc)
return rc;
- if (down_interruptible(&readbuffer_mutex))
+ if (mutex_lock_interruptible(&readbuffer_mutex))
return -ERESTARTSYS;
spin_lock_irqsave(&bufferlock, flags);
}
@@ -626,11 +626,11 @@
spin_unlock_irqrestore(&bufferlock, flags);
if (copy_to_user(buf, readbuffer, effective_count)) {
- up(&readbuffer_mutex);
+ mutex_unlock(&readbuffer_mutex);
return -EFAULT;
}
- up(&readbuffer_mutex);
+ mutex_unlock(&readbuffer_mutex);
return effective_count;
}