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path: root/arch/s390/appldata/appldata_base.c
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Diffstat (limited to 'arch/s390/appldata/appldata_base.c')
-rw-r--r--arch/s390/appldata/appldata_base.c132
1 files changed, 14 insertions, 118 deletions
diff --git a/arch/s390/appldata/appldata_base.c b/arch/s390/appldata/appldata_base.c
index 24bff4f1cc5..bae0f402bf2 100644
--- a/arch/s390/appldata/appldata_base.c
+++ b/arch/s390/appldata/appldata_base.c
@@ -1,6 +1,4 @@
/*
- * arch/s390/appldata/appldata_base.c
- *
* Base infrastructure for Linux-z/VM Monitor Stream, Stage 1.
* Exports appldata_register_ops() and appldata_unregister_ops() for the
* data gathering modules.
@@ -29,7 +27,7 @@
#include <linux/suspend.h>
#include <linux/platform_device.h>
#include <asm/appldata.h>
-#include <asm/timer.h>
+#include <asm/vtimer.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <asm/smp.h>
@@ -84,8 +82,7 @@ static struct ctl_table appldata_dir_table[] = {
/*
* Timer
*/
-static DEFINE_PER_CPU(struct vtimer_list, appldata_timer);
-static atomic_t appldata_expire_count = ATOMIC_INIT(0);
+static struct vtimer_list appldata_timer;
static DEFINE_SPINLOCK(appldata_timer_lock);
static int appldata_interval = APPLDATA_CPU_INTERVAL;
@@ -115,10 +112,7 @@ static LIST_HEAD(appldata_ops_list);
*/
static void appldata_timer_function(unsigned long data)
{
- if (atomic_dec_and_test(&appldata_expire_count)) {
- atomic_set(&appldata_expire_count, num_online_cpus());
- queue_work(appldata_wq, (struct work_struct *) data);
- }
+ queue_work(appldata_wq, (struct work_struct *) data);
}
/*
@@ -131,7 +125,6 @@ static void appldata_work_fn(struct work_struct *work)
struct list_head *lh;
struct appldata_ops *ops;
- get_online_cpus();
mutex_lock(&appldata_ops_mutex);
list_for_each(lh, &appldata_ops_list) {
ops = list_entry(lh, struct appldata_ops, list);
@@ -140,7 +133,6 @@ static void appldata_work_fn(struct work_struct *work)
}
}
mutex_unlock(&appldata_ops_mutex);
- put_online_cpus();
}
/*
@@ -168,20 +160,6 @@ int appldata_diag(char record_nr, u16 function, unsigned long buffer,
/****************************** /proc stuff **********************************/
-/*
- * appldata_mod_vtimer_wrap()
- *
- * wrapper function for mod_virt_timer(), because smp_call_function_single()
- * accepts only one parameter.
- */
-static void __appldata_mod_vtimer_wrap(void *p) {
- struct {
- struct vtimer_list *timer;
- u64 expires;
- } *args = p;
- mod_virt_timer_periodic(args->timer, args->expires);
-}
-
#define APPLDATA_ADD_TIMER 0
#define APPLDATA_DEL_TIMER 1
#define APPLDATA_MOD_TIMER 2
@@ -192,49 +170,28 @@ static void __appldata_mod_vtimer_wrap(void *p) {
* Add, delete or modify virtual timers on all online cpus.
* The caller needs to get the appldata_timer_lock spinlock.
*/
-static void
-__appldata_vtimer_setup(int cmd)
+static void __appldata_vtimer_setup(int cmd)
{
- u64 per_cpu_interval;
- int i;
+ u64 timer_interval = (u64) appldata_interval * 1000 * TOD_MICRO;
switch (cmd) {
case APPLDATA_ADD_TIMER:
if (appldata_timer_active)
break;
- per_cpu_interval = (u64) (appldata_interval*1000 /
- num_online_cpus()) * TOD_MICRO;
- for_each_online_cpu(i) {
- per_cpu(appldata_timer, i).expires = per_cpu_interval;
- smp_call_function_single(i, add_virt_timer_periodic,
- &per_cpu(appldata_timer, i),
- 1);
- }
+ appldata_timer.expires = timer_interval;
+ add_virt_timer_periodic(&appldata_timer);
appldata_timer_active = 1;
break;
case APPLDATA_DEL_TIMER:
- for_each_online_cpu(i)
- del_virt_timer(&per_cpu(appldata_timer, i));
+ del_virt_timer(&appldata_timer);
if (!appldata_timer_active)
break;
appldata_timer_active = 0;
- atomic_set(&appldata_expire_count, num_online_cpus());
break;
case APPLDATA_MOD_TIMER:
- per_cpu_interval = (u64) (appldata_interval*1000 /
- num_online_cpus()) * TOD_MICRO;
if (!appldata_timer_active)
break;
- for_each_online_cpu(i) {
- struct {
- struct vtimer_list *timer;
- u64 expires;
- } args;
- args.timer = &per_cpu(appldata_timer, i);
- args.expires = per_cpu_interval;
- smp_call_function_single(i, __appldata_mod_vtimer_wrap,
- &args, 1);
- }
+ mod_virt_timer_periodic(&appldata_timer, timer_interval);
}
}
@@ -265,14 +222,12 @@ appldata_timer_handler(ctl_table *ctl, int write,
len = *lenp;
if (copy_from_user(buf, buffer, len > sizeof(buf) ? sizeof(buf) : len))
return -EFAULT;
- get_online_cpus();
spin_lock(&appldata_timer_lock);
if (buf[0] == '1')
__appldata_vtimer_setup(APPLDATA_ADD_TIMER);
else if (buf[0] == '0')
__appldata_vtimer_setup(APPLDATA_DEL_TIMER);
spin_unlock(&appldata_timer_lock);
- put_online_cpus();
out:
*lenp = len;
*ppos += len;
@@ -305,20 +260,17 @@ appldata_interval_handler(ctl_table *ctl, int write,
goto out;
}
len = *lenp;
- if (copy_from_user(buf, buffer, len > sizeof(buf) ? sizeof(buf) : len)) {
+ if (copy_from_user(buf, buffer, len > sizeof(buf) ? sizeof(buf) : len))
return -EFAULT;
- }
interval = 0;
sscanf(buf, "%i", &interval);
if (interval <= 0)
return -EINVAL;
- get_online_cpus();
spin_lock(&appldata_timer_lock);
appldata_interval = interval;
__appldata_vtimer_setup(APPLDATA_MOD_TIMER);
spin_unlock(&appldata_timer_lock);
- put_online_cpus();
out:
*lenp = len;
*ppos += len;
@@ -485,14 +437,12 @@ static int appldata_freeze(struct device *dev)
int rc;
struct list_head *lh;
- get_online_cpus();
spin_lock(&appldata_timer_lock);
if (appldata_timer_active) {
__appldata_vtimer_setup(APPLDATA_DEL_TIMER);
appldata_timer_suspended = 1;
}
spin_unlock(&appldata_timer_lock);
- put_online_cpus();
mutex_lock(&appldata_ops_mutex);
list_for_each(lh, &appldata_ops_list) {
@@ -516,14 +466,12 @@ static int appldata_restore(struct device *dev)
int rc;
struct list_head *lh;
- get_online_cpus();
spin_lock(&appldata_timer_lock);
if (appldata_timer_suspended) {
__appldata_vtimer_setup(APPLDATA_ADD_TIMER);
appldata_timer_suspended = 0;
}
spin_unlock(&appldata_timer_lock);
- put_online_cpus();
mutex_lock(&appldata_ops_mutex);
list_for_each(lh, &appldata_ops_list) {
@@ -567,53 +515,6 @@ static struct platform_driver appldata_pdrv = {
/******************************* init / exit *********************************/
-static void __cpuinit appldata_online_cpu(int cpu)
-{
- init_virt_timer(&per_cpu(appldata_timer, cpu));
- per_cpu(appldata_timer, cpu).function = appldata_timer_function;
- per_cpu(appldata_timer, cpu).data = (unsigned long)
- &appldata_work;
- atomic_inc(&appldata_expire_count);
- spin_lock(&appldata_timer_lock);
- __appldata_vtimer_setup(APPLDATA_MOD_TIMER);
- spin_unlock(&appldata_timer_lock);
-}
-
-static void __cpuinit appldata_offline_cpu(int cpu)
-{
- del_virt_timer(&per_cpu(appldata_timer, cpu));
- if (atomic_dec_and_test(&appldata_expire_count)) {
- atomic_set(&appldata_expire_count, num_online_cpus());
- queue_work(appldata_wq, &appldata_work);
- }
- spin_lock(&appldata_timer_lock);
- __appldata_vtimer_setup(APPLDATA_MOD_TIMER);
- spin_unlock(&appldata_timer_lock);
-}
-
-static int __cpuinit appldata_cpu_notify(struct notifier_block *self,
- unsigned long action,
- void *hcpu)
-{
- switch (action) {
- case CPU_ONLINE:
- case CPU_ONLINE_FROZEN:
- appldata_online_cpu((long) hcpu);
- break;
- case CPU_DEAD:
- case CPU_DEAD_FROZEN:
- appldata_offline_cpu((long) hcpu);
- break;
- default:
- break;
- }
- return NOTIFY_OK;
-}
-
-static struct notifier_block __cpuinitdata appldata_nb = {
- .notifier_call = appldata_cpu_notify,
-};
-
/*
* appldata_init()
*
@@ -621,7 +522,10 @@ static struct notifier_block __cpuinitdata appldata_nb = {
*/
static int __init appldata_init(void)
{
- int i, rc;
+ int rc;
+
+ appldata_timer.function = appldata_timer_function;
+ appldata_timer.data = (unsigned long) &appldata_work;
rc = platform_driver_register(&appldata_pdrv);
if (rc)
@@ -639,14 +543,6 @@ static int __init appldata_init(void)
goto out_device;
}
- get_online_cpus();
- for_each_online_cpu(i)
- appldata_online_cpu(i);
- put_online_cpus();
-
- /* Register cpu hotplug notifier */
- register_hotcpu_notifier(&appldata_nb);
-
appldata_sysctl_header = register_sysctl_table(appldata_dir_table);
return 0;
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-01 07:26:42 +0000