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[213.175.37.10]) by smtp.gmail.com with ESMTPSA id v8sm33615wrw.2.2020.02.05.06.29.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 05 Feb 2020 06:29:29 -0800 (PST) From: Vitaly Kuznetsov To: Sean Christopherson Cc: Wanpeng Li , Jim Mattson , Joerg Roedel , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Paolo Bonzini Subject: Re: [PATCH 01/26] KVM: x86: Remove superfluous brackets from case statement In-Reply-To: <20200129234640.8147-2-sean.j.christopherson@intel.com> References: <20200129234640.8147-1-sean.j.christopherson@intel.com> <20200129234640.8147-2-sean.j.christopherson@intel.com> Date: Wed, 05 Feb 2020 15:29:28 +0100 Message-ID: <87mu9xkszb.fsf@vitty.brq.redhat.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Sean Christopherson writes: > Remove unnecessary brackets from a case statement that unintentionally > encapsulates unrelated case statements in the same switch statement. > While technically legal and functionally correct syntax, the brackets > are visually confusing and potentially dangerous, e.g. the last of the > encapsulated case statements has an undocumented fall-through that isn't > flagged by compilers due the encapsulation. > > Signed-off-by: Sean Christopherson > --- > arch/x86/kvm/x86.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c > index 7e3f1d937224..24597526b5de 100644 > --- a/arch/x86/kvm/x86.c > +++ b/arch/x86/kvm/x86.c > @@ -5260,7 +5260,7 @@ static void kvm_init_msr_list(void) > !intel_pt_validate_hw_cap(PT_CAP_single_range_output))) > continue; > break; > - case MSR_IA32_RTIT_ADDR0_A ... MSR_IA32_RTIT_ADDR3_B: { > + case MSR_IA32_RTIT_ADDR0_A ... MSR_IA32_RTIT_ADDR3_B: > if (!kvm_x86_ops->pt_supported() || > msrs_to_save_all[i] - MSR_IA32_RTIT_ADDR0_A >= > intel_pt_validate_hw_cap(PT_CAP_num_address_ranges) * 2) > @@ -5275,7 +5275,7 @@ static void kvm_init_msr_list(void) > if (msrs_to_save_all[i] - MSR_ARCH_PERFMON_EVENTSEL0 >= > min(INTEL_PMC_MAX_GENERIC, x86_pmu.num_counters_gp)) > continue; > - } > + break; > default: > break; > } Reviewed-by: Vitaly Kuznetsov -- Vitaly