linux-kernel - [PATCH] s390: crypto make ap

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Date:   Thu, 9 Feb 2017 09:48:10 -0500
From:   Paul Gortmaker <paul.gortmaker@...driver.com>
To:     <linux-kernel@...r.kernel.org>
CC:     Paul Gortmaker <paul.gortmaker@...driver.com>,
        Harald Freudenberger <freude@...ibm.com>,
        Martin Schwidefsky <schwidefsky@...ibm.com>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        <linux-s390@...r.kernel.org>
Subject: [PATCH] s390: crypto make ap_bus explicitly non-modular

The Makefile in drivers/s390 has:

	obj-y += cio/ block/ char/ crypto/ net/ scsi/ virtio/

..and the Makefile in crypto/ has:

	ap-objs := ap_bus.o ap_card.o ap_queue.o

...meaning that it currently is not being built as a module by anyone.

Lets remove the modular code that is essentially orphaned, so that
when reading the driver there is no doubt it is builtin-only.

Since module_init translates to device_initcall in the non-modular
case, the init ordering remains unchanged with this commit.

Also note that MODULE_ALIAS is a no-op for non-module builds.

We also delete the MODULE_LICENSE tag etc. since all that information
is already contained at the top of the file in the comments.

We replace module.h with moduleparam.h since the file does declare
some module parameters even though it is not modular itself.

Cc: Harald Freudenberger <freude@...ibm.com>
Cc: Martin Schwidefsky <schwidefsky@...ibm.com>
Cc: Heiko Carstens <heiko.carstens@...ibm.com>
Cc: linux-s390@...r.kernel.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@...driver.com>
---
 drivers/s390/crypto/ap_bus.c | 54 +++-----------------------------------------
 1 file changed, 3 insertions(+), 51 deletions(-)

diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c
index 5fa699192864..7183a316f9be 100644
--- a/drivers/s390/crypto/ap_bus.c
+++ b/drivers/s390/crypto/ap_bus.c
@@ -27,7 +27,7 @@
 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
 
 #include <linux/kernel_stat.h>
-#include <linux/module.h>
+#include <linux/moduleparam.h>
 #include <linux/init.h>
 #include <linux/delay.h>
 #include <linux/err.h>
@@ -54,16 +54,7 @@
 #include "ap_debug.h"
 
 /*
- * Module description.
- */
-MODULE_AUTHOR("IBM Corporation");
-MODULE_DESCRIPTION("Adjunct Processor Bus driver, " \
-		   "Copyright IBM Corp. 2006, 2012");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_CRYPTO("z90crypt");
-
-/*
- * Module parameter
+ * Module parameters; note though this file itself isn't modular.
  */
 int ap_domain_index = -1;	/* Adjunct Processor Domain Index */
 static DEFINE_SPINLOCK(ap_domain_lock);
@@ -1270,43 +1261,4 @@ int __init ap_module_init(void)
 	kfree(ap_configuration);
 	return rc;
 }
-
-/**
- * ap_modules_exit(): The module termination code
- *
- * Terminates the module.
- */
-void ap_module_exit(void)
-{
-	int i;
-
-	initialised = false;
-	ap_reset_domain();
-	ap_poll_thread_stop();
-	del_timer_sync(&ap_config_timer);
-	hrtimer_cancel(&ap_poll_timer);
-	tasklet_kill(&ap_tasklet);
-
-	/* first remove queue devices */
-	bus_for_each_dev(&ap_bus_type, NULL, NULL,
-			 __ap_queue_devices_unregister);
-	/* now remove the card devices */
-	bus_for_each_dev(&ap_bus_type, NULL, NULL,
-			 __ap_card_devices_unregister);
-
-	/* remove bus attributes */
-	for (i = 0; ap_bus_attrs[i]; i++)
-		bus_remove_file(&ap_bus_type, ap_bus_attrs[i]);
-	unregister_pm_notifier(&ap_power_notifier);
-	root_device_unregister(ap_root_device);
-	bus_unregister(&ap_bus_type);
-	kfree(ap_configuration);
-	unregister_reset_call(&ap_reset_call);
-	if (ap_using_interrupts())
-		unregister_adapter_interrupt(&ap_airq);
-
-	ap_debug_exit();
-}
-
-module_init(ap_module_init);
-module_exit(ap_module_exit);
+device_initcall(ap_module_init);
-- 
2.11.0