--- linux-2.5.24-clean/fs/driverfs/inode.c	Thu Jun 20 15:53:45 2002
+++ linux/fs/driverfs/inode.c	Thu Jul  4 00:22:54 2002
@@ -128,6 +128,7 @@
 	return inode;
 }
 
+static spinlock_t driverfs_mknod_lock = SPIN_LOCK_UNLOCKED;
 static int driverfs_mknod(struct inode *dir, struct dentry *dentry, int mode, int dev)
 {
 	struct inode *inode = driverfs_get_inode(dir->i_sb, mode, dev);
@@ -146,20 +147,20 @@
 static int driverfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
 {
 	int res;
-	lock_kernel();
 	dentry->d_op = &driverfs_dentry_dir_ops;
+	spin_lock(&driverfs_mknod_lock);
  	res = driverfs_mknod(dir, dentry, mode | S_IFDIR, 0);
-	unlock_kernel();
+	spin_unlock(&driverfs_mknod_lock);
 	return res;
 }
 
 static int driverfs_create(struct inode *dir, struct dentry *dentry, int mode)
 {
 	int res;
-	lock_kernel();
 	dentry->d_op = &driverfs_dentry_file_ops;
+	spin_lock(&driverfs_mknod_lock);
  	res = driverfs_mknod(dir, dentry, mode | S_IFREG, 0);
-	unlock_kernel();
+	spin_unlock(&driverfs_mknod_lock);
 	return res;
 }
 
@@ -211,9 +212,9 @@
 	if (driverfs_empty(dentry)) {
 		struct inode *inode = dentry->d_inode;
 
-		lock_kernel();
+		down(&inode->i_sem);
 		inode->i_nlink--;
-		unlock_kernel();
+		up(&inode->i_sem);
 		dput(dentry);
 		error = 0;
 	}
@@ -353,8 +354,9 @@
 driverfs_file_lseek(struct file *file, loff_t offset, int orig)
 {
 	loff_t retval = -EINVAL;
+        struct inode *inode = file->f_dentry->d_inode->i_mapping->host;
 
-	lock_kernel();
+	down(&inode->i_sem);	
 	switch(orig) {
 	case 0:
 		if (offset > 0) {
@@ -371,7 +373,7 @@
 	default:
 		break;
 	}
-	unlock_kernel();
+	up(&inode->i_sem);
 	return retval;
 }