linux-kernel - [PATCH v3 5/5] KVM: refactor asynchronous vcpu ioctl dispatch

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Date:	Fri, 14 Aug 2015 12:08:37 +0200
From:	Radim Krčmář <rkrcmar@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	kvm@...r.kernel.org, Paolo Bonzini <pbonzini@...hat.com>,
	Christian Borntraeger <borntraeger@...ibm.com>
Subject: [PATCH v3 5/5] KVM: refactor asynchronous vcpu ioctl dispatch

I find the switch easier to read and modify.

Signed-off-by: Radim Krčmář <rkrcmar@...hat.com>
---
 v3: precisely #ifdef arch-specific ioctls [Christian]
 v2: new

 virt/kvm/kvm_main.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index dfa2d5f27713..c059c01161fe 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -2255,12 +2255,16 @@ static long kvm_vcpu_ioctl(struct file *filp,
 	 * Special cases: vcpu ioctls that are asynchronous to vcpu execution,
 	 * so vcpu_load() would break it.
 	 */
-#if defined(CONFIG_S390) || defined(CONFIG_PPC) || defined(CONFIG_MIPS)
-	if (ioctl == KVM_S390_INTERRUPT || ioctl == KVM_S390_IRQ || ioctl == KVM_INTERRUPT)
-		return kvm_arch_vcpu_ioctl(filp, ioctl, arg);
+	switch (ioctl) {
+#if defined(CONFIG_S390)
+	case KVM_S390_INTERRUPT:
+	case KVM_S390_IRQ:
+#elif defined(CONFIG_PPC) || defined(CONFIG_MIPS)
+	case KVM_INTERRUPT:
 #endif
-	if (ioctl == KVM_USER_EXIT)
+	case KVM_USER_EXIT:
 		return kvm_arch_vcpu_ioctl(filp, ioctl, arg);
+	}
 
 	r = vcpu_load(vcpu);
 	if (r)
-- 
2.5.0

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