s390/zcrypt: remove ZCRYPT_MULTIDEVNODES kernel config option

Remove ZCRYPT_MULTIDEVNODES kernel config option and make
the dependent code always build.

The last years showed, that this option is enabled on all distros
and exploited by some features (for example CEX plugin for kubernetes).
So remove this choice as it was never used to switch off the multiple
devices support for the zcrypt device driver.

Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Reviewed-by: Holger Dengler <dengler@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>

Author: hfreude

drivers/crypto/Kconfig

@@ -92,17 +92,6 @@ config ZCRYPT_DEBUG
 
 	  If unsure, say N.
 
-config ZCRYPT_MULTIDEVNODES
-	bool "Support for multiple zcrypt device nodes"
-	default y
-	depends on S390
-	depends on ZCRYPT
-	help
-	  With this option enabled the zcrypt device driver can
-	  provide multiple devices nodes in /dev. Each device
-	  node can get customized to limit access and narrow
-	  down the use of the available crypto hardware.
-
 config PKEY
 	tristate "Kernel API for protected key handling"
 	depends on S390

drivers/s390/crypto/zcrypt_api.c

@@ -111,8 +111,6 @@ EXPORT_SYMBOL(zcrypt_msgtype);
  * Multi device nodes extension functions.
  */
 
-#ifdef CONFIG_ZCRYPT_MULTIDEVNODES
-
 struct zcdn_device;
 
 static struct class *zcrypt_class;
@@ -477,8 +475,6 @@ static void zcdn_destroy_all(void)
 	mutex_unlock(&ap_perms_mutex);
 }
 
-#endif
-
 /*
  * zcrypt_read (): Not supported beyond zcrypt 1.3.1.
  *
@@ -510,7 +506,6 @@ static int zcrypt_open(struct inode *inode, struct file *filp)
 {
 	struct ap_perms *perms = &ap_perms;
 
-#ifdef CONFIG_ZCRYPT_MULTIDEVNODES
 	if (filp->f_inode->i_cdev == &zcrypt_cdev) {
 		struct zcdn_device *zcdndev;
 
@@ -522,7 +517,6 @@ static int zcrypt_open(struct inode *inode, struct file *filp)
 		if (zcdndev)
 			perms = &zcdndev->perms;
 	}
-#endif
 	filp->private_data = (void *)perms;
 
 	atomic_inc(&zcrypt_open_count);
@@ -536,7 +530,6 @@ static int zcrypt_open(struct inode *inode, struct file *filp)
  */
 static int zcrypt_release(struct inode *inode, struct file *filp)
 {
-#ifdef CONFIG_ZCRYPT_MULTIDEVNODES
 	if (filp->f_inode->i_cdev == &zcrypt_cdev) {
 		struct zcdn_device *zcdndev;
 
@@ -549,7 +542,6 @@ static int zcrypt_release(struct inode *inode, struct file *filp)
 			put_device(&zcdndev->device);
 		}
 	}
-#endif
 
 	atomic_dec(&zcrypt_open_count);
 	return 0;
@@ -2061,8 +2053,6 @@ void zcrypt_debug_exit(void)
 	debug_unregister(zcrypt_dbf_info);
 }
 
-#ifdef CONFIG_ZCRYPT_MULTIDEVNODES
-
 static int __init zcdn_init(void)
 {
 	int rc;
@@ -2120,8 +2110,6 @@ static void zcdn_exit(void)
 	class_destroy(zcrypt_class);
 }
 
-#endif
-
 /*
  * zcrypt_api_init(): Module initialization.
  *
@@ -2135,11 +2123,9 @@ int __init zcrypt_api_init(void)
 	if (rc)
 		goto out;
 
-#ifdef CONFIG_ZCRYPT_MULTIDEVNODES
 	rc = zcdn_init();
 	if (rc)
 		goto out;
-#endif
 
 	/* Register the request sprayer. */
 	rc = misc_register(&zcrypt_misc_device);
@@ -2152,9 +2138,7 @@ int __init zcrypt_api_init(void)
 	return 0;
 
 out_misc_register_failed:
-#ifdef CONFIG_ZCRYPT_MULTIDEVNODES
 	zcdn_exit();
-#endif
 	zcrypt_debug_exit();
 out:
 	return rc;
@@ -2167,9 +2151,7 @@ int __init zcrypt_api_init(void)
  */
 void __exit zcrypt_api_exit(void)
 {
-#ifdef CONFIG_ZCRYPT_MULTIDEVNODES
 	zcdn_exit();
-#endif
 	misc_deregister(&zcrypt_misc_device);
 	zcrypt_msgtype6_exit();
 	zcrypt_msgtype50_exit();