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path: root/drivers/char/viotape.c
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Diffstat (limited to 'drivers/char/viotape.c')
-rw-r--r--drivers/char/viotape.c11
1 files changed, 6 insertions, 5 deletions
diff --git a/drivers/char/viotape.c b/drivers/char/viotape.c
index 42f7fa442ff8..6f954a808b65 100644
--- a/drivers/char/viotape.c
+++ b/drivers/char/viotape.c
@@ -46,7 +46,7 @@
#include <linux/completion.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
-#include <linux/smp_lock.h>
+#include <linux/mutex.h>
#include <linux/slab.h>
#include <asm/uaccess.h>
@@ -64,6 +64,7 @@
#define VIOTAPE_KERN_WARN KERN_WARNING "viotape: "
#define VIOTAPE_KERN_INFO KERN_INFO "viotape: "
+static DEFINE_MUTEX(proc_viotape_mutex);
static int viotape_numdev;
/*
@@ -684,9 +685,9 @@ static long viotap_unlocked_ioctl(struct file *file,
{
long rc;
- lock_kernel();
+ mutex_lock(&proc_viotape_mutex);
rc = viotap_ioctl(file->f_path.dentry->d_inode, file, cmd, arg);
- unlock_kernel();
+ mutex_unlock(&proc_viotape_mutex);
return rc;
}
@@ -700,7 +701,7 @@ static int viotap_open(struct inode *inode, struct file *file)
if (op == NULL)
return -ENOMEM;
- lock_kernel();
+ mutex_lock(&proc_viotape_mutex);
get_dev_info(file->f_path.dentry->d_inode, &devi);
/* Note: We currently only support one mode! */
@@ -731,7 +732,7 @@ static int viotap_open(struct inode *inode, struct file *file)
free_op:
free_op_struct(op);
- unlock_kernel();
+ mutex_unlock(&proc_viotape_mutex);
return ret;
}