Commit e05ef9bd authored by Christian Borntraeger's avatar Christian Borntraeger Committed by Martin Schwidefsky

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

commit 050eef36
    [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: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 376ae475
...@@ -449,6 +449,8 @@ int s390_enable_sie(void) ...@@ -449,6 +449,8 @@ int s390_enable_sie(void)
tsk->mm = tsk->active_mm = mm; tsk->mm = tsk->active_mm = mm;
preempt_disable(); preempt_disable();
update_mm(mm, tsk); 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)); cpumask_set_cpu(smp_processor_id(), mm_cpumask(mm));
preempt_enable(); preempt_enable();
task_unlock(tsk); task_unlock(tsk);
......
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