From: Christian Borntraeger Date: Thu, 16 Jul 2009 15:17:37 +0000 (+0200) Subject: KVM: s390: fix wait_queue handling X-Git-Tag: upstream/snapshot3+hdmi~17879^2~5 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d3bc2f91b4761a8d9f96bea167fef2f8c00dea54;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git KVM: s390: fix wait_queue handling There are two waitqueues in kvm for wait handling: vcpu->wq for virt/kvm/kvm_main.c and vpcu->arch.local_int.wq for the s390 specific wait code. the wait handling in kvm_s390_handle_wait was broken by using different wait_queues for add_wait queue and remove_wait_queue. There are two options to fix the problem: o move all the s390 specific code to vcpu->wq and remove vcpu->arch.local_int.wq o move all the s390 specific code to vcpu->arch.local_int.wq This patch chooses the 2nd variant for two reasons: o s390 does not use kvm_vcpu_block but implements its own enabled wait handling. Having a separate wait_queue make it clear, that our wait mechanism is different o the patch is much smaller Report-by: Julia Lawall Signed-off-by: Christian Borntraeger Signed-off-by: Marcelo Tosatti Signed-off-by: Avi Kivity --- diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c index f04f530..4d61341 100644 --- a/arch/s390/kvm/interrupt.c +++ b/arch/s390/kvm/interrupt.c @@ -386,7 +386,7 @@ no_timer: } __unset_cpu_idle(vcpu); __set_current_state(TASK_RUNNING); - remove_wait_queue(&vcpu->wq, &wait); + remove_wait_queue(&vcpu->arch.local_int.wq, &wait); spin_unlock_bh(&vcpu->arch.local_int.lock); spin_unlock(&vcpu->arch.local_int.float_int->lock); hrtimer_try_to_cancel(&vcpu->arch.ckc_timer);