Commit e05ef9bd authored Oct 25, 2010 by Christian Borntraeger Committed by Martin Schwidefsky Oct 25, 2010

[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: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

parent 376ae475

arch/s390/mm/pgtable.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -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);