X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=drivers%2Fchar%2Fviotape.c;fp=drivers%2Fchar%2Fviotape.c;h=ad6e64a2912d6fe61d06d7c20135e76a92bc9e1c;hb=59f40aff7930052a74ddf5c297aa1974b0838529;hp=42f7fa442ff80653c3cbabf9c80bd1b2e05de28d;hpb=291b7c3a02a7eafbb8ea89a2c0e93676d6972926;p=mv-sheeva.git

diff --git a/drivers/char/viotape.c b/drivers/char/viotape.c
index 42f7fa442ff..ad6e64a2912 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;
 }
 
@@ -804,6 +805,7 @@ const struct file_operations viotap_fops = {
 	.unlocked_ioctl =	viotap_unlocked_ioctl,
 	.open =			viotap_open,
 	.release =		viotap_release,
+	.llseek = 		noop_llseek,
 };
 
 /* Handle interrupt events for tape */