isdn: use non-racy method for proc entries creation

Use proc_create()/proc_create_data() to make sure that ->proc_fops and ->data
be setup before gluing PDE to main tree.

Add correct ->owner to proc_fops to fix reading/module unloading race.

Signed-off-by: Denis V. Lunev <[e-mail]>
Acked-by: Karsten Keil <[e-mail]>
Cc: Alexey Dobriyan <[e-mail]>
Cc: "Eric W. Biederman" <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/isdn/capi/kcapi_proc.c

···
 }
 
 static const struct file_operations proc_controller_ops = {
+	.owner		= THIS_MODULE,
 	.open		= seq_controller_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
···
 };
 
 static const struct file_operations proc_contrstats_ops = {
+	.owner		= THIS_MODULE,
 	.open		= seq_contrstats_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
···
 }
 
 static const struct file_operations proc_applications_ops = {
+	.owner		= THIS_MODULE,
 	.open		= seq_applications_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
···
 };
 
 static const struct file_operations proc_applstats_ops = {
+	.owner		= THIS_MODULE,
 	.open		= seq_applstats_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
 	.release	= seq_release,
 };
-
-static void
-create_seq_entry(char *name, mode_t mode, const struct file_operations *f)
-{
-	struct proc_dir_entry *entry;
-	entry = create_proc_entry(name, mode, NULL);
-	if (entry)
-		entry->proc_fops = f;
-}
 
 // ---------------------------------------------------------------------------
 
···
 }
 
 static const struct file_operations proc_driver_ops = {
+	.owner		= THIS_MODULE,
 	.open		= seq_capi_driver_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
···
 {
 	proc_mkdir("capi",             NULL);
 	proc_mkdir("capi/controllers", NULL);
-	create_seq_entry("capi/controller",   0, &proc_controller_ops);
-	create_seq_entry("capi/contrstats",   0, &proc_contrstats_ops);
-	create_seq_entry("capi/applications", 0, &proc_applications_ops);
-	create_seq_entry("capi/applstats",    0, &proc_applstats_ops);
-	create_seq_entry("capi/driver",       0, &proc_driver_ops);
+	proc_create("capi/controller",   0, NULL, &proc_controller_ops);
+	proc_create("capi/contrstats",   0, NULL, &proc_contrstats_ops);
+	proc_create("capi/applications", 0, NULL, &proc_applications_ops);
+	proc_create("capi/applstats",    0, NULL, &proc_applstats_ops);
+	proc_create("capi/driver",       0, NULL, &proc_driver_ops);
 }
 
 void __exit

drivers/isdn/divert/divert_procfs.c

···
 	isdn_proc_entry = proc_mkdir("isdn", init_net.proc_net);
 	if (!isdn_proc_entry)
 		return (-1);
-	isdn_divert_entry = create_proc_entry("divert", S_IFREG | S_IRUGO, isdn_proc_entry);
+	isdn_divert_entry = proc_create("divert", S_IFREG | S_IRUGO,
+					isdn_proc_entry, &isdn_fops);
 	if (!isdn_divert_entry) {
 		remove_proc_entry("isdn", init_net.proc_net);
 		return (-1);
 	}
-	isdn_divert_entry->proc_fops = &isdn_fops; 
-	isdn_divert_entry->owner = THIS_MODULE; 
 #endif	/* CONFIG_PROC_FS */
 
 	return (0);

drivers/isdn/hardware/eicon/divasproc.c

···
 
 int create_divas_proc(void)
 {
-	divas_proc_entry = create_proc_entry(divas_proc_name,
-					     S_IFREG | S_IRUGO,
-					     proc_net_eicon);
+	proc_create(divas_proc_name, S_IFREG | S_IRUGO, proc_net_eicon,
+		    &divas_fops);
 	if (!divas_proc_entry)
 		return (0);
-
-	divas_proc_entry->proc_fops = &divas_fops;
-	divas_proc_entry->owner = THIS_MODULE;
 
 	return (1);
 }

drivers/isdn/hysdn/hysdn_procconf.c

···
 /******************************************************/
 static const struct file_operations conf_fops =
 {
+	.owner		= THIS_MODULE,
 	.llseek         = no_llseek,
 	.read           = hysdn_conf_read,
 	.write          = hysdn_conf_write,
···
 	while (card) {
 
 		sprintf(conf_name, "%s%d", PROC_CONF_BASENAME, card->myid);
-		if ((card->procconf = (void *) create_proc_entry(conf_name,
-					     S_IFREG | S_IRUGO | S_IWUSR,
-					    hysdn_proc_entry)) != NULL) {
-			((struct proc_dir_entry *) card->procconf)->proc_fops = &conf_fops;
-			((struct proc_dir_entry *) card->procconf)->owner = THIS_MODULE;
+		if ((card->procconf = (void *) proc_create(conf_name,
+						S_IFREG | S_IRUGO | S_IWUSR,
+						hysdn_proc_entry)) != NULL) {
 			hysdn_proclog_init(card);	/* init the log file entry */
 		}
 		card = card->next;	/* next entry */

drivers/isdn/hysdn/hysdn_proclog.c

···
 /**************************************************/
 static const struct file_operations log_fops =
 {
+	.owner		= THIS_MODULE,
 	.llseek         = no_llseek,
 	.read           = hysdn_log_read,
 	.write          = hysdn_log_write,
···
 
 	if ((pd = kzalloc(sizeof(struct procdata), GFP_KERNEL)) != NULL) {
 		sprintf(pd->log_name, "%s%d", PROC_LOG_BASENAME, card->myid);
-		if ((pd->log = create_proc_entry(pd->log_name, S_IFREG | S_IRUGO | S_IWUSR, hysdn_proc_entry)) != NULL) {
-		        pd->log->proc_fops = &log_fops; 
-		        pd->log->owner = THIS_MODULE;
-		}
+		pd->log = proc_create(pd->log_name,
+				S_IFREG | S_IRUGO | S_IWUSR, hysdn_proc_entry,
+				&log_fops);
 
 		init_waitqueue_head(&(pd->rd_queue));