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Diffstat (limited to 'kernel/cpu.c')
-rw-r--r--kernel/cpu.c19
1 files changed, 10 insertions, 9 deletions
diff --git a/kernel/cpu.c b/kernel/cpu.c
index 48810498b355..1a823944e972 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -97,7 +97,7 @@ static inline void check_for_tasks(int cpu)
97 (!cputime_eq(p->utime, cputime_zero) || 97 (!cputime_eq(p->utime, cputime_zero) ||
98 !cputime_eq(p->stime, cputime_zero))) 98 !cputime_eq(p->stime, cputime_zero)))
99 printk(KERN_WARNING "Task %s (pid = %d) is on cpu %d\ 99 printk(KERN_WARNING "Task %s (pid = %d) is on cpu %d\
100 (state = %ld, flags = %lx) \n", 100 (state = %ld, flags = %x) \n",
101 p->comm, p->pid, cpu, p->state, p->flags); 101 p->comm, p->pid, cpu, p->state, p->flags);
102 } 102 }
103 write_unlock_irq(&tasklist_lock); 103 write_unlock_irq(&tasklist_lock);
@@ -122,9 +122,10 @@ static int take_cpu_down(void *unused)
122/* Requires cpu_add_remove_lock to be held */ 122/* Requires cpu_add_remove_lock to be held */
123static int _cpu_down(unsigned int cpu) 123static int _cpu_down(unsigned int cpu)
124{ 124{
125 int err; 125 int err, nr_calls = 0;
126 struct task_struct *p; 126 struct task_struct *p;
127 cpumask_t old_allowed, tmp; 127 cpumask_t old_allowed, tmp;
128 void *hcpu = (void *)(long)cpu;
128 129
129 if (num_online_cpus() == 1) 130 if (num_online_cpus() == 1)
130 return -EBUSY; 131 return -EBUSY;
@@ -132,11 +133,12 @@ static int _cpu_down(unsigned int cpu)
132 if (!cpu_online(cpu)) 133 if (!cpu_online(cpu))
133 return -EINVAL; 134 return -EINVAL;
134 135
135 raw_notifier_call_chain(&cpu_chain, CPU_LOCK_ACQUIRE, 136 raw_notifier_call_chain(&cpu_chain, CPU_LOCK_ACQUIRE, hcpu);
136 (void *)(long)cpu); 137 err = __raw_notifier_call_chain(&cpu_chain, CPU_DOWN_PREPARE,
137 err = raw_notifier_call_chain(&cpu_chain, CPU_DOWN_PREPARE, 138 hcpu, -1, &nr_calls);
138 (void *)(long)cpu);
139 if (err == NOTIFY_BAD) { 139 if (err == NOTIFY_BAD) {
140 __raw_notifier_call_chain(&cpu_chain, CPU_DOWN_FAILED, hcpu,
141 nr_calls, NULL);
140 printk("%s: attempt to take down CPU %u failed\n", 142 printk("%s: attempt to take down CPU %u failed\n",
141 __FUNCTION__, cpu); 143 __FUNCTION__, cpu);
142 err = -EINVAL; 144 err = -EINVAL;
@@ -156,7 +158,7 @@ static int _cpu_down(unsigned int cpu)
156 if (IS_ERR(p) || cpu_online(cpu)) { 158 if (IS_ERR(p) || cpu_online(cpu)) {
157 /* CPU didn't die: tell everyone. Can't complain. */ 159 /* CPU didn't die: tell everyone. Can't complain. */
158 if (raw_notifier_call_chain(&cpu_chain, CPU_DOWN_FAILED, 160 if (raw_notifier_call_chain(&cpu_chain, CPU_DOWN_FAILED,
159 (void *)(long)cpu) == NOTIFY_BAD) 161 hcpu) == NOTIFY_BAD)
160 BUG(); 162 BUG();
161 163
162 if (IS_ERR(p)) { 164 if (IS_ERR(p)) {
@@ -178,8 +180,7 @@ static int _cpu_down(unsigned int cpu)
178 put_cpu(); 180 put_cpu();
179 181
180 /* CPU is completely dead: tell everyone. Too late to complain. */ 182 /* CPU is completely dead: tell everyone. Too late to complain. */
181 if (raw_notifier_call_chain(&cpu_chain, CPU_DEAD, 183 if (raw_notifier_call_chain(&cpu_chain, CPU_DEAD, hcpu) == NOTIFY_BAD)
182 (void *)(long)cpu) == NOTIFY_BAD)
183 BUG(); 184 BUG();
184 185
185 check_for_tasks(cpu); 186 check_for_tasks(cpu);