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s390/ap: modularize ap bus

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There is no hard requirement to have the ap bus statically in the
kernel, so add an option to compile it as module.

Cc: Tony Krowiak <akrowiak@linux.ibm.com>
Cc: Halil Pasic <pasic@linux.ibm.com>
Signed-off-by: Holger Dengler <dengler@linux.ibm.com>
Reviewed-by: Harald Freudenberger <freude@linux.ibm.com>
Reviewed-by: Anthony Krowiak <akrowiak@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
This commit is contained in:
Holger Dengler
2024-02-19 18:10:19 +01:00
committed by Alexander Gordeev
parent 2a483d333f
commit 123760841a
6 changed files with 44 additions and 8 deletions
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30
drivers/s390/crypto/ap_bus.c
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@@ -44,9 +44,10 @@
#include "ap_bus.h"
#include "ap_debug.h"
/*
* Module parameters; note though this file itself isn't modular.
*/
MODULE_AUTHOR("IBM Corporation");
MODULE_DESCRIPTION("Adjunct Processor Bus driver");
MODULE_LICENSE("GPL");
int ap_domain_index = -1; /* Adjunct Processor Domain Index */
static DEFINE_SPINLOCK(ap_domain_lock);
module_param_named(domain, ap_domain_index, int, 0440);
@@ -2284,6 +2285,16 @@ static void ap_scan_bus_wq_callback(struct work_struct *unused)
}
}
static inline void __exit ap_async_exit(void)
{
if (ap_thread_flag)
ap_poll_thread_stop();
chsc_notifier_unregister(&ap_bus_nb);
cancel_work(&ap_scan_bus_work);
hrtimer_cancel(&ap_poll_timer);
timer_delete(&ap_scan_bus_timer);
}
static inline int __init ap_async_init(void)
{
int rc;
@@ -2451,4 +2462,15 @@ out:
ap_debug_exit();
return rc;
}
device_initcall(ap_module_init);
static void __exit ap_module_exit(void)
{
ap_async_exit();
ap_irq_exit();
root_device_unregister(ap_root_device);
bus_unregister(&ap_bus_type);
ap_debug_exit();
}
module_init(ap_module_init);
module_exit(ap_module_exit);