linux-kernel - Re: [PATCH 1/6] KVM: x86: selftests: Fix typos in macro variable use

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Message-ID: <ZsYwF5QJ8gqto8Mm@google.com>
Date: Wed, 21 Aug 2024 18:21:11 +0000
From: Mingwei Zhang <mizhang@...gle.com>
To: Colton Lewis <coltonlewis@...gle.com>
Cc: kvm@...r.kernel.org, Jinrong Liang <ljr.kernel@...il.com>,
	Jim Mattson <jmattson@...gle.com>,
	Aaron Lewis <aaronlewis@...gle.com>,
	Sean Christopherson <seanjc@...gle.com>,
	Paolo Bonzini <pbonzini@...hat.com>, Shuah Khan <shuah@...nel.org>,
	linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/6] KVM: x86: selftests: Fix typos in macro variable use

On Tue, Aug 13, 2024, Colton Lewis wrote:
> Without the leading underscore, these variables are referencing a
> variable in the calling scope. It only worked before by accident
> because all calling scopes had a variable with the right name.
> 
> Signed-off-by: Colton Lewis <coltonlewis@...gle.com>

This might need a fixes tag, right?
Fixes: cd34fd8c758e ("KVM: selftests: Test PMC virtualization with forced emulation")

no need to cc stable tree though, since this is very minor.

Reviewed-by: Mingwei Zhang <mizhang@...gle.com>
> ---
>  tools/testing/selftests/kvm/x86_64/pmu_counters_test.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c b/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c
> index 698cb36989db..0e305e43a93b 100644
> --- a/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c
> @@ -174,7 +174,7 @@ do {										\
>  
>  #define GUEST_TEST_EVENT(_idx, _event, _pmc, _pmc_msr, _ctrl_msr, _value, FEP)	\
>  do {										\
> -	wrmsr(pmc_msr, 0);							\
> +	wrmsr(_pmc_msr, 0);							\
>  										\
>  	if (this_cpu_has(X86_FEATURE_CLFLUSHOPT))				\
>  		GUEST_MEASURE_EVENT(_ctrl_msr, _value, "clflushopt .", FEP);	\
> @@ -331,9 +331,9 @@ __GUEST_ASSERT(expect_gp ? vector == GP_VECTOR : !vector,			\
>  	       expect_gp ? "#GP" : "no fault", msr, vector)			\
>  
>  #define GUEST_ASSERT_PMC_VALUE(insn, msr, val, expected)			\
> -	__GUEST_ASSERT(val == expected_val,					\
> +	__GUEST_ASSERT(val == expected,					\
>  		       "Expected " #insn "(0x%x) to yield 0x%lx, got 0x%lx",	\
> -		       msr, expected_val, val);
> +		       msr, expected, val);
>  
>  static void guest_test_rdpmc(uint32_t rdpmc_idx, bool expect_success,
>  			     uint64_t expected_val)
> -- 
> 2.46.0.76.ge559c4bf1a-goog
>