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[S390] kvm: Fix badness at include/asm/mmu_context.h:83

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commit 050eef364a
    [S390] fix tlb flushing vs. concurrent /proc accesses
broke KVM on s390x. On every schedule a
Badness at include/asm/mmu_context.h:83 appears. s390_enable_sie
replaces the mm on the __running__ task, therefore, we have to
increase the attach count of the new mm.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Christian Borntraeger 2010-10-25 16:10:45 +02:00 committed by Martin Schwidefsky
parent 376ae4752e
commit e05ef9bdb8
1 changed files with 2 additions and 0 deletions
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2
arch/s390/mm/pgtable.c
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@ -449,6 +449,8 @@ int s390_enable_sie(void)
tsk->mm = tsk->active_mm = mm;
preempt_disable();
update_mm(mm, tsk);
atomic_inc(&mm->context.attach_count);
atomic_dec(&old_mm->context.attach_count);
cpumask_set_cpu(smp_processor_id(), mm_cpumask(mm));
preempt_enable();
task_unlock(tsk);