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| author | Christian Borntraeger <borntraeger@de.ibm.com> | 2010-10-25 16:10:45 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> | 2010-10-25 16:10:20 +0200 |
| commit | e05ef9bdb899e2f3798be74691842fc597d8ce60 (patch) | |
| tree | b9839fa5324735d86d4d528d7ab527649805f718 /arch | |
| parent | 376ae4752e3a387d41a2ba9c9ea45c2df625e6e4 (diff) | |
| download | lwn-e05ef9bdb899e2f3798be74691842fc597d8ce60.tar.gz lwn-e05ef9bdb899e2f3798be74691842fc597d8ce60.zip | |
[S390] kvm: Fix badness at include/asm/mmu_context.h:83
commit 050eef364ad700590a605a0749f825cab4834b1e
[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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/s390/mm/pgtable.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c index 19338d228c9b..0c719c61972e 100644 --- a/arch/s390/mm/pgtable.c +++ b/arch/s390/mm/pgtable.c @@ -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); |