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s390/pfault: always search for task with reported pid
Make the code a bit more symmetric and always search for the task of the reported pid. This simplifies the code a bit. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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d5e50a51cc
commit
54c2779122
1 changed files with 10 additions and 14 deletions
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@ -549,19 +549,15 @@ static void pfault_interrupt(struct ext_code ext_code,
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if ((subcode & 0xff00) != __SUBCODE_MASK)
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return;
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kstat_cpu(smp_processor_id()).irqs[EXTINT_PFL]++;
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if (subcode & 0x0080) {
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/* Get the token (= pid of the affected task). */
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pid = sizeof(void *) == 4 ? param32 : param64;
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rcu_read_lock();
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tsk = find_task_by_pid_ns(pid, &init_pid_ns);
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if (tsk)
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get_task_struct(tsk);
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rcu_read_unlock();
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if (!tsk)
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return;
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} else {
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tsk = current;
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}
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/* Get the token (= pid of the affected task). */
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pid = sizeof(void *) == 4 ? param32 : param64;
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rcu_read_lock();
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tsk = find_task_by_pid_ns(pid, &init_pid_ns);
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if (tsk)
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get_task_struct(tsk);
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rcu_read_unlock();
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if (!tsk)
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return;
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spin_lock(&pfault_lock);
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if (subcode & 0x0080) {
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/* signal bit is set -> a page has been swapped in by VM */
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@ -586,7 +582,6 @@ static void pfault_interrupt(struct ext_code ext_code,
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if (tsk->state == TASK_RUNNING)
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tsk->thread.pfault_wait = -1;
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}
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put_task_struct(tsk);
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} else {
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/* signal bit not set -> a real page is missing. */
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if (tsk->thread.pfault_wait == 1) {
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@ -612,6 +607,7 @@ static void pfault_interrupt(struct ext_code ext_code,
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}
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}
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spin_unlock(&pfault_lock);
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put_task_struct(tsk);
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}
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static int __cpuinit pfault_cpu_notify(struct notifier_block *self,
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