1 files changed, 14 insertions, 13 deletions

diff --git a/drivers/isdn/i4l/isdn_common.c b/drivers/isdn/i4l/isdn_common.c
index a44cdb492ea9..15632bd2f643 100644
--- a/drivers/isdn/i4l/isdn_common.c
+++ b/drivers/isdn/i4l/isdn_common.c
@@ -17,7 +17,7 @@
 #include <linux/slab.h>
 #include <linux/vmalloc.h>
 #include <linux/isdn.h>
-#include <linux/smp_lock.h>
+#include <linux/mutex.h>
 #include "isdn_common.h"
 #include "isdn_tty.h"
 #include "isdn_net.h"
@@ -42,6 +42,7 @@ MODULE_LICENSE("GPL");
 
 isdn_dev *dev;
 
+static DEFINE_MUTEX(isdn_mutex);
 static char *isdn_revision = "$Revision: 1.1.2.3 $";
 
 extern char *isdn_net_revision;
@@ -1070,7 +1071,7 @@ isdn_read(struct file *file, char __user *buf, size_t count, loff_t * off)
         int retval;
         char *p;
 
-        lock_kernel();
+        mutex_lock(&isdn_mutex);
         if (minor == ISDN_MINOR_STATUS) {
                 if (!file->private_data) {
                         if (file->f_flags & O_NONBLOCK) {
@@ -1163,7 +1164,7 @@ isdn_read(struct file *file, char __user *buf, size_t count, loff_t * off)
 #endif
         retval = -ENODEV;
  out:
-        unlock_kernel();
+        mutex_unlock(&isdn_mutex);
         return retval;
 }
 
@@ -1180,7 +1181,7 @@ isdn_write(struct file *file, const char __user *buf, size_t count, loff_t * off
         if (!dev->drivers)
                 return -ENODEV;
 
-        lock_kernel();
+        mutex_lock(&isdn_mutex);
         if (minor <= ISDN_MINOR_BMAX) {
                 printk(KERN_WARNING "isdn_write minor %d obsolete!\n", minor);
                 drvidx = isdn_minor2drv(minor);
@@ -1225,7 +1226,7 @@ isdn_write(struct file *file, const char __user *buf, size_t count, loff_t * off
 #endif
         retval = -ENODEV;
  out:
-        unlock_kernel();
+        mutex_unlock(&isdn_mutex);
         return retval;
 }
 
@@ -1236,7 +1237,7 @@ isdn_poll(struct file *file, poll_table * wait)
         unsigned int minor = iminor(file->f_path.dentry->d_inode);
         int drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
 
-        lock_kernel();
+        mutex_lock(&isdn_mutex);
         if (minor == ISDN_MINOR_STATUS) {
                 poll_wait(file, &(dev->info_waitq), wait);
                 /* mask = POLLOUT | POLLWRNORM; */
@@ -1266,7 +1267,7 @@ isdn_poll(struct file *file, poll_table * wait)
 #endif
         mask = POLLERR;
  out:
-        unlock_kernel();
+        mutex_unlock(&isdn_mutex);
         return mask;
 }
 
@@ -1727,9 +1728,9 @@ isdn_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
         int ret;
 
-        lock_kernel();
+        mutex_lock(&isdn_mutex);
         ret = isdn_ioctl(file, cmd, arg);
-        unlock_kernel();
+        mutex_unlock(&isdn_mutex);
 
         return ret;
 }
@@ -1745,7 +1746,7 @@ isdn_open(struct inode *ino, struct file *filep)
         int chidx;
         int retval = -ENODEV;
 
-        lock_kernel();
+        mutex_lock(&isdn_mutex);
         if (minor == ISDN_MINOR_STATUS) {
                 infostruct *p;
 
@@ -1796,7 +1797,7 @@ isdn_open(struct inode *ino, struct file *filep)
 #endif
  out:
         nonseekable_open(ino, filep);
-        unlock_kernel();
+        mutex_unlock(&isdn_mutex);
         return retval;
 }
 
@@ -1805,7 +1806,7 @@ isdn_close(struct inode *ino, struct file *filep)
 {
         uint minor = iminor(ino);
 
-        lock_kernel();
+        mutex_lock(&isdn_mutex);
         if (minor == ISDN_MINOR_STATUS) {
                 infostruct *p = dev->infochain;
                 infostruct *q = NULL;
@@ -1839,7 +1840,7 @@ isdn_close(struct inode *ino, struct file *filep)
 #endif
 
  out:
-        unlock_kernel();
+        mutex_unlock(&isdn_mutex);
         return 0;
 }