linux-kernel - [PATCH v6 4/6] mips/kvm: Use ARRAY_SIZE() instead of hardcoded constants in kvm_arch_vcpu_ioctl_{s,g}et

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Message-Id: <1369327750-28580-5-git-send-email-ddaney.cavm@gmail.com>
Date:	Thu, 23 May 2013 09:49:08 -0700
From:	David Daney <ddaney.cavm@...il.com>
To:	linux-mips@...ux-mips.org, ralf@...ux-mips.org,
	kvm@...r.kernel.org, Sanjay Lal <sanjayl@...asys.com>,
	Gleb Natapov <gleb@...hat.com>
Cc:	linux-kernel@...r.kernel.org, David Daney <david.daney@...ium.com>
Subject: [PATCH v6 4/6] mips/kvm: Use ARRAY_SIZE() instead of hardcoded constants in kvm_arch_vcpu_ioctl_{s,g}et_regs

From: David Daney <david.daney@...ium.com>

Also we cannot set special zero register, so force it to zero.

Signed-off-by: David Daney <david.daney@...ium.com>
Acked-by: Sanjay Lal <sanjayl@...asys.com>
---
 arch/mips/kvm/kvm_mips.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/mips/kvm/kvm_mips.c b/arch/mips/kvm/kvm_mips.c
index 93da750..71a1fc1 100644
--- a/arch/mips/kvm/kvm_mips.c
+++ b/arch/mips/kvm/kvm_mips.c
@@ -677,9 +677,9 @@ int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 {
 	int i;
 
-	for (i = 0; i < 32; i++)
+	for (i = 1; i < ARRAY_SIZE(vcpu->arch.gprs); i++)
 		vcpu->arch.gprs[i] = regs->gpr[i];
-
+	vcpu->arch.gprs[0] = 0; /* zero is special, and cannot be set. */
 	vcpu->arch.hi = regs->hi;
 	vcpu->arch.lo = regs->lo;
 	vcpu->arch.pc = regs->pc;
@@ -691,7 +691,7 @@ int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 {
 	int i;
 
-	for (i = 0; i < 32; i++)
+	for (i = 0; i < ARRAY_SIZE(vcpu->arch.gprs); i++)
 		regs->gpr[i] = vcpu->arch.gprs[i];
 
 	regs->hi = vcpu->arch.hi;
-- 
1.7.11.7

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