linux-kernel - [PATCH 35/46] KVM: Drop obsolete cpu_get/put in make_all_cpus

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Date:	Sun, 23 Aug 2009 14:56:34 +0300
From:	Avi Kivity <avi@...hat.com>
To:	kvm@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH 35/46] KVM: Drop obsolete cpu_get/put in make_all_cpus_request

From: Jan Kiszka <jan.kiszka@...mens.com>

spin_lock disables preemption, so we can simply read the current cpu.

Signed-off-by: Jan Kiszka <jan.kiszka@...mens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@...hat.com>
---
 virt/kvm/kvm_main.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 532af9b..646cf2a 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -741,8 +741,8 @@ static bool make_all_cpus_request(struct kvm *kvm, unsigned int req)
 	if (alloc_cpumask_var(&cpus, GFP_ATOMIC))
 		cpumask_clear(cpus);
 
-	me = get_cpu();
 	spin_lock(&kvm->requests_lock);
+	me = smp_processor_id();
 	kvm_for_each_vcpu(i, vcpu, kvm) {
 		if (test_and_set_bit(req, &vcpu->requests))
 			continue;
@@ -757,7 +757,6 @@ static bool make_all_cpus_request(struct kvm *kvm, unsigned int req)
 	else
 		called = false;
 	spin_unlock(&kvm->requests_lock);
-	put_cpu();
 	free_cpumask_var(cpus);
 	return called;
 }
-- 
1.6.4.1

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