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Fix compile failure in arch/powerpc/kernel/pci-common.c
[firefly-linux-kernel-4.4.55.git]
/
kernel
/
cpu.c
diff --git
a/kernel/cpu.c
b/kernel/cpu.c
index 7406fe6966f908cb547fba3de5fcf5d566f831ea..181ae7086029e0b0eebb60cbc264b01b49f9297d 100644
(file)
--- a/
kernel/cpu.c
+++ b/
kernel/cpu.c
@@
-97,17
+97,25
@@
static inline void check_for_tasks(int cpu)
(!cputime_eq(p->utime, cputime_zero) ||
!cputime_eq(p->stime, cputime_zero)))
printk(KERN_WARNING "Task %s (pid = %d) is on cpu %d\
(!cputime_eq(p->utime, cputime_zero) ||
!cputime_eq(p->stime, cputime_zero)))
printk(KERN_WARNING "Task %s (pid = %d) is on cpu %d\
- (state = %ld, flags = %
l
x) \n",
+ (state = %ld, flags = %x) \n",
p->comm, p->pid, cpu, p->state, p->flags);
}
write_unlock_irq(&tasklist_lock);
}
p->comm, p->pid, cpu, p->state, p->flags);
}
write_unlock_irq(&tasklist_lock);
}
+struct take_cpu_down_param {
+ unsigned long mod;
+ void *hcpu;
+};
+
/* Take this CPU down. */
/* Take this CPU down. */
-static int take_cpu_down(void *
unused
)
+static int take_cpu_down(void *
_param
)
{
{
+ struct take_cpu_down_param *param = _param;
int err;
int err;
+ raw_notifier_call_chain(&cpu_chain, CPU_DYING | param->mod,
+ param->hcpu);
/* Ensure this CPU doesn't handle any more interrupts. */
err = __cpu_disable();
if (err < 0)
/* Ensure this CPU doesn't handle any more interrupts. */
err = __cpu_disable();
if (err < 0)
@@
-120,11
+128,17
@@
static int take_cpu_down(void *unused)
}
/* Requires cpu_add_remove_lock to be held */
}
/* Requires cpu_add_remove_lock to be held */
-static int _cpu_down(unsigned int cpu)
+static int _cpu_down(unsigned int cpu
, int tasks_frozen
)
{
{
- int err;
+ int err
, nr_calls = 0
;
struct task_struct *p;
cpumask_t old_allowed, tmp;
struct task_struct *p;
cpumask_t old_allowed, tmp;
+ void *hcpu = (void *)(long)cpu;
+ unsigned long mod = tasks_frozen ? CPU_TASKS_FROZEN : 0;
+ struct take_cpu_down_param tcd_param = {
+ .mod = mod,
+ .hcpu = hcpu,
+ };
if (num_online_cpus() == 1)
return -EBUSY;
if (num_online_cpus() == 1)
return -EBUSY;
@@
-132,12
+146,16
@@
static int _cpu_down(unsigned int cpu)
if (!cpu_online(cpu))
return -EINVAL;
if (!cpu_online(cpu))
return -EINVAL;
- err = raw_notifier_call_chain(&cpu_chain, CPU_DOWN_PREPARE,
- (void *)(long)cpu);
+ raw_notifier_call_chain(&cpu_chain, CPU_LOCK_ACQUIRE, hcpu);
+ err = __raw_notifier_call_chain(&cpu_chain, CPU_DOWN_PREPARE | mod,
+ hcpu, -1, &nr_calls);
if (err == NOTIFY_BAD) {
if (err == NOTIFY_BAD) {
+ __raw_notifier_call_chain(&cpu_chain, CPU_DOWN_FAILED | mod,
+ hcpu, nr_calls, NULL);
printk("%s: attempt to take down CPU %u failed\n",
__FUNCTION__, cpu);
printk("%s: attempt to take down CPU %u failed\n",
__FUNCTION__, cpu);
- return -EINVAL;
+ err = -EINVAL;
+ goto out_release;
}
/* Ensure that we are not runnable on dying cpu */
}
/* Ensure that we are not runnable on dying cpu */
@@
-147,13
+165,13
@@
static int _cpu_down(unsigned int cpu)
set_cpus_allowed(current, tmp);
mutex_lock(&cpu_bitmask_lock);
set_cpus_allowed(current, tmp);
mutex_lock(&cpu_bitmask_lock);
- p = __stop_machine_run(take_cpu_down,
NULL
, cpu);
+ p = __stop_machine_run(take_cpu_down,
&tcd_param
, cpu);
mutex_unlock(&cpu_bitmask_lock);
if (IS_ERR(p) || cpu_online(cpu)) {
/* CPU didn't die: tell everyone. Can't complain. */
mutex_unlock(&cpu_bitmask_lock);
if (IS_ERR(p) || cpu_online(cpu)) {
/* CPU didn't die: tell everyone. Can't complain. */
- if (raw_notifier_call_chain(&cpu_chain, CPU_DOWN_FAILED,
-
(void *)(long)
cpu) == NOTIFY_BAD)
+ if (raw_notifier_call_chain(&cpu_chain, CPU_DOWN_FAILED
| mod
,
+
h
cpu) == NOTIFY_BAD)
BUG();
if (IS_ERR(p)) {
BUG();
if (IS_ERR(p)) {
@@
-170,13
+188,9
@@
static int _cpu_down(unsigned int cpu)
/* This actually kills the CPU. */
__cpu_die(cpu);
/* This actually kills the CPU. */
__cpu_die(cpu);
- /* Move it here so it can run. */
- kthread_bind(p, get_cpu());
- put_cpu();
-
/* CPU is completely dead: tell everyone. Too late to complain. */
/* CPU is completely dead: tell everyone. Too late to complain. */
- if (raw_notifier_call_chain(&cpu_chain, CPU_DEAD,
-
(void *)(long)
cpu) == NOTIFY_BAD)
+ if (raw_notifier_call_chain(&cpu_chain, CPU_DEAD
| mod
,
+
h
cpu) == NOTIFY_BAD)
BUG();
check_for_tasks(cpu);
BUG();
check_for_tasks(cpu);
@@
-185,6
+199,8
@@
out_thread:
err = kthread_stop(p);
out_allowed:
set_cpus_allowed(current, old_allowed);
err = kthread_stop(p);
out_allowed:
set_cpus_allowed(current, old_allowed);
+out_release:
+ raw_notifier_call_chain(&cpu_chain, CPU_LOCK_RELEASE, hcpu);
return err;
}
return err;
}
@@
-196,7
+212,7
@@
int cpu_down(unsigned int cpu)
if (cpu_hotplug_disabled)
err = -EBUSY;
else
if (cpu_hotplug_disabled)
err = -EBUSY;
else
- err = _cpu_down(cpu);
+ err = _cpu_down(cpu
, 0
);
mutex_unlock(&cpu_add_remove_lock);
return err;
mutex_unlock(&cpu_add_remove_lock);
return err;
@@
-204,15
+220,18
@@
int cpu_down(unsigned int cpu)
#endif /*CONFIG_HOTPLUG_CPU*/
/* Requires cpu_add_remove_lock to be held */
#endif /*CONFIG_HOTPLUG_CPU*/
/* Requires cpu_add_remove_lock to be held */
-static int __cpuinit _cpu_up(unsigned int cpu)
+static int __cpuinit _cpu_up(unsigned int cpu
, int tasks_frozen
)
{
{
- int ret;
+ int ret
, nr_calls = 0
;
void *hcpu = (void *)(long)cpu;
void *hcpu = (void *)(long)cpu;
+ unsigned long mod = tasks_frozen ? CPU_TASKS_FROZEN : 0;
if (cpu_online(cpu) || !cpu_present(cpu))
return -EINVAL;
if (cpu_online(cpu) || !cpu_present(cpu))
return -EINVAL;
- ret = raw_notifier_call_chain(&cpu_chain, CPU_UP_PREPARE, hcpu);
+ raw_notifier_call_chain(&cpu_chain, CPU_LOCK_ACQUIRE, hcpu);
+ ret = __raw_notifier_call_chain(&cpu_chain, CPU_UP_PREPARE | mod, hcpu,
+ -1, &nr_calls);
if (ret == NOTIFY_BAD) {
printk("%s: attempt to bring up CPU %u failed\n",
__FUNCTION__, cpu);
if (ret == NOTIFY_BAD) {
printk("%s: attempt to bring up CPU %u failed\n",
__FUNCTION__, cpu);
@@
-229,12
+248,13
@@
static int __cpuinit _cpu_up(unsigned int cpu)
BUG_ON(!cpu_online(cpu));
/* Now call notifier in preparation. */
BUG_ON(!cpu_online(cpu));
/* Now call notifier in preparation. */
- raw_notifier_call_chain(&cpu_chain, CPU_ONLINE, hcpu);
+ raw_notifier_call_chain(&cpu_chain, CPU_ONLINE
| mod
, hcpu);
out_notify:
if (ret != 0)
out_notify:
if (ret != 0)
- raw_notifier_call_chain(&cpu_chain,
- CPU_UP_CANCELED, hcpu);
+ __raw_notifier_call_chain(&cpu_chain,
+ CPU_UP_CANCELED | mod, hcpu, nr_calls, NULL);
+ raw_notifier_call_chain(&cpu_chain, CPU_LOCK_RELEASE, hcpu);
return ret;
}
return ret;
}
@@
-247,7
+267,7
@@
int __cpuinit cpu_up(unsigned int cpu)
if (cpu_hotplug_disabled)
err = -EBUSY;
else
if (cpu_hotplug_disabled)
err = -EBUSY;
else
- err = _cpu_up(cpu);
+ err = _cpu_up(cpu
, 0
);
mutex_unlock(&cpu_add_remove_lock);
return err;
mutex_unlock(&cpu_add_remove_lock);
return err;
@@
-261,16
+281,7
@@
int disable_nonboot_cpus(void)
int cpu, first_cpu, error = 0;
mutex_lock(&cpu_add_remove_lock);
int cpu, first_cpu, error = 0;
mutex_lock(&cpu_add_remove_lock);
- first_cpu = first_cpu(cpu_present_map);
- if (!cpu_online(first_cpu)) {
- error = _cpu_up(first_cpu);
- if (error) {
- printk(KERN_ERR "Could not bring CPU%d up.\n",
- first_cpu);
- goto out;
- }
- }
-
+ first_cpu = first_cpu(cpu_online_map);
/* We take down all of the non-boot CPUs in one shot to avoid races
* with the userspace trying to use the CPU hotplug at the same time
*/
/* We take down all of the non-boot CPUs in one shot to avoid races
* with the userspace trying to use the CPU hotplug at the same time
*/
@@
-279,7
+290,7
@@
int disable_nonboot_cpus(void)
for_each_online_cpu(cpu) {
if (cpu == first_cpu)
continue;
for_each_online_cpu(cpu) {
if (cpu == first_cpu)
continue;
- error = _cpu_down(cpu);
+ error = _cpu_down(cpu
, 1
);
if (!error) {
cpu_set(cpu, frozen_cpus);
printk("CPU%d is down\n", cpu);
if (!error) {
cpu_set(cpu, frozen_cpus);
printk("CPU%d is down\n", cpu);
@@
-296,7
+307,6
@@
int disable_nonboot_cpus(void)
} else {
printk(KERN_ERR "Non-boot CPUs are not disabled\n");
}
} else {
printk(KERN_ERR "Non-boot CPUs are not disabled\n");
}
-out:
mutex_unlock(&cpu_add_remove_lock);
return error;
}
mutex_unlock(&cpu_add_remove_lock);
return error;
}
@@
-308,18
+318,20
@@
void enable_nonboot_cpus(void)
/* Allow everyone to use the CPU hotplug again */
mutex_lock(&cpu_add_remove_lock);
cpu_hotplug_disabled = 0;
/* Allow everyone to use the CPU hotplug again */
mutex_lock(&cpu_add_remove_lock);
cpu_hotplug_disabled = 0;
- mutex_unlock(&cpu_add_remove_lock);
+ if (cpus_empty(frozen_cpus))
+ goto out;
printk("Enabling non-boot CPUs ...\n");
for_each_cpu_mask(cpu, frozen_cpus) {
printk("Enabling non-boot CPUs ...\n");
for_each_cpu_mask(cpu, frozen_cpus) {
- error =
cpu_up(cpu
);
+ error =
_cpu_up(cpu, 1
);
if (!error) {
printk("CPU%d is up\n", cpu);
continue;
}
if (!error) {
printk("CPU%d is up\n", cpu);
continue;
}
- printk(KERN_WARNING "Error taking CPU%d up: %d\n",
- cpu, error);
+ printk(KERN_WARNING "Error taking CPU%d up: %d\n", cpu, error);
}
cpus_clear(frozen_cpus);
}
cpus_clear(frozen_cpus);
+out:
+ mutex_unlock(&cpu_add_remove_lock);
}
#endif
}
#endif