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Diffstat (limited to 'drivers/s390/char/vmcp.c')
-rw-r--r--drivers/s390/char/vmcp.c38
1 files changed, 8 insertions, 30 deletions
diff --git a/drivers/s390/char/vmcp.c b/drivers/s390/char/vmcp.c
index 5bb59d36a6d4..04e532eec032 100644
--- a/drivers/s390/char/vmcp.c
+++ b/drivers/s390/char/vmcp.c
@@ -1,24 +1,20 @@
1/* 1/*
2 * Copyright IBM Corp. 2004,2007 2 * Copyright IBM Corp. 2004,2010
3 * Interface implementation for communication with the z/VM control program 3 * Interface implementation for communication with the z/VM control program
4 * Author(s): Christian Borntraeger <borntraeger@de.ibm.com>
5 * 4 *
5 * Author(s): Christian Borntraeger <borntraeger@de.ibm.com>
6 * 6 *
7 * z/VMs CP offers the possibility to issue commands via the diagnose code 8 7 * z/VMs CP offers the possibility to issue commands via the diagnose code 8
8 * this driver implements a character device that issues these commands and 8 * this driver implements a character device that issues these commands and
9 * returns the answer of CP. 9 * returns the answer of CP.
10 10 *
11 * The idea of this driver is based on cpint from Neale Ferguson and #CP in CMS 11 * The idea of this driver is based on cpint from Neale Ferguson and #CP in CMS
12 */ 12 */
13 13
14#define KMSG_COMPONENT "vmcp"
15#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
16
17#include <linux/fs.h> 14#include <linux/fs.h>
18#include <linux/init.h> 15#include <linux/init.h>
19#include <linux/kernel.h> 16#include <linux/kernel.h>
20#include <linux/miscdevice.h> 17#include <linux/miscdevice.h>
21#include <linux/module.h>
22#include <linux/slab.h> 18#include <linux/slab.h>
23#include <asm/compat.h> 19#include <asm/compat.h>
24#include <asm/cpcmd.h> 20#include <asm/cpcmd.h>
@@ -26,10 +22,6 @@
26#include <asm/uaccess.h> 22#include <asm/uaccess.h>
27#include "vmcp.h" 23#include "vmcp.h"
28 24
29MODULE_LICENSE("GPL");
30MODULE_AUTHOR("Christian Borntraeger <borntraeger@de.ibm.com>");
31MODULE_DESCRIPTION("z/VM CP interface");
32
33static debug_info_t *vmcp_debug; 25static debug_info_t *vmcp_debug;
34 26
35static int vmcp_open(struct inode *inode, struct file *file) 27static int vmcp_open(struct inode *inode, struct file *file)
@@ -197,11 +189,8 @@ static int __init vmcp_init(void)
197{ 189{
198 int ret; 190 int ret;
199 191
200 if (!MACHINE_IS_VM) { 192 if (!MACHINE_IS_VM)
201 pr_warning("The z/VM CP interface device driver cannot be " 193 return 0;
202 "loaded without z/VM\n");
203 return -ENODEV;
204 }
205 194
206 vmcp_debug = debug_register("vmcp", 1, 1, 240); 195 vmcp_debug = debug_register("vmcp", 1, 1, 240);
207 if (!vmcp_debug) 196 if (!vmcp_debug)
@@ -214,19 +203,8 @@ static int __init vmcp_init(void)
214 } 203 }
215 204
216 ret = misc_register(&vmcp_dev); 205 ret = misc_register(&vmcp_dev);
217 if (ret) { 206 if (ret)
218 debug_unregister(vmcp_debug); 207 debug_unregister(vmcp_debug);
219 return ret; 208 return ret;
220 }
221
222 return 0;
223}
224
225static void __exit vmcp_exit(void)
226{
227 misc_deregister(&vmcp_dev);
228 debug_unregister(vmcp_debug);
229} 209}
230 210device_initcall(vmcp_init);
231module_init(vmcp_init);
232module_exit(vmcp_exit);