From: Will Deacon <will.deacon@arm.com>
To: kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org
Cc: marc.zyngier@arm.com, Will Deacon <will.deacon@arm.com>,
shannon.zhao@linaro.org
Subject: [PATCH] arm64: KVM: Add braces to multi-line if statement in virtual PMU code
Date: Fri, 1 Apr 2016 12:12:22 +0100 [thread overview]
Message-ID: <1459509142-13524-1-git-send-email-will.deacon@arm.com> (raw)
The kernel is written in C, not python, so we need braces around
multi-line if statements. GCC 6 actually warns about this, thanks to the
fantastic new "-Wmisleading-indentation" flag:
| virt/kvm/arm/pmu.c: In function ‘kvm_pmu_overflow_status’:
| virt/kvm/arm/pmu.c:198:3: warning: statement is indented as if it were guarded by... [-Wmisleading-indentation]
| reg &= vcpu_sys_reg(vcpu, PMCNTENSET_EL0);
| ^~~
| arch/arm64/kvm/../../../virt/kvm/arm/pmu.c:196:2: note: ...this ‘if’ clause, but it is not
| if ((vcpu_sys_reg(vcpu, PMCR_EL0) & ARMV8_PMU_PMCR_E))
| ^~
As it turns out, this particular case is harmless (we just do some &=
operations with 0), but worth fixing nonetheless.
Signed-off-by: Will Deacon <will.deacon@arm.com>
---
virt/kvm/arm/pmu.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/virt/kvm/arm/pmu.c b/virt/kvm/arm/pmu.c
index b5754c6c5508..575c7aa30d7e 100644
--- a/virt/kvm/arm/pmu.c
+++ b/virt/kvm/arm/pmu.c
@@ -193,11 +193,12 @@ static u64 kvm_pmu_overflow_status(struct kvm_vcpu *vcpu)
{
u64 reg = 0;
- if ((vcpu_sys_reg(vcpu, PMCR_EL0) & ARMV8_PMU_PMCR_E))
+ if ((vcpu_sys_reg(vcpu, PMCR_EL0) & ARMV8_PMU_PMCR_E)) {
reg = vcpu_sys_reg(vcpu, PMOVSSET_EL0);
reg &= vcpu_sys_reg(vcpu, PMCNTENSET_EL0);
reg &= vcpu_sys_reg(vcpu, PMINTENSET_EL1);
reg &= kvm_pmu_valid_counter_mask(vcpu);
+ }
return reg;
}
--
2.1.4
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next reply other threads:[~2016-04-01 11:11 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-01 11:12 Will Deacon [this message]
2016-04-01 11:30 ` [PATCH] arm64: KVM: Add braces to multi-line if statement in virtual PMU code Christoffer Dall
2016-04-01 11:36 ` Will Deacon
2016-04-01 12:10 ` Christoffer Dall
2016-04-01 14:23 ` Shannon Zhao
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