linux-kernel - [PATCH v2 4/8] cpupower: Remove unused pscur variable.

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Message-ID: <161159611089.68367.4122824171734411902.stgit@ethanol01c7-host.amd.com>
Date:   Mon, 25 Jan 2021 11:35:10 -0600
From:   Nathan Fontenot <nathan.fontenot@....com>
To:     rrichter@....com, shuah@...nel.org, linux-kernel@...r.kernel.org,
        trenn@...e.com, linux-pm@...r.kernel.org
Cc:     boris.ostrovsky@...cle.com, joao.m.martins@...cle.com,
        konrad.wilk@...cle.com
Subject: [PATCH v2 4/8] cpupower: Remove unused pscur variable.

The pscur variable is set but not uused, just remove it.

This may have previsously been set to validate the MSR_AMD_PSTATE_STATUS
MSR. With the addition of the CPUPOWER_CAP_AMD_HW_PSTATE cap flag this
is no longer needed since the cpuid bit to enable this cap flag also
validates that the MSR_AMD_PSTATE_STATUS MSR is present.

Signed-off-by: Nathan Fontenot <nathan.fontenot@....com>
---
 tools/power/cpupower/utils/helpers/amd.c |    9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/tools/power/cpupower/utils/helpers/amd.c b/tools/power/cpupower/utils/helpers/amd.c
index 8b69c7ff639a..fc2ac1e6bfb2 100644
--- a/tools/power/cpupower/utils/helpers/amd.c
+++ b/tools/power/cpupower/utils/helpers/amd.c
@@ -90,7 +90,7 @@ static int get_cof(int family, union core_pstate pstate)
 int decode_pstates(unsigned int cpu, unsigned int cpu_family,
 		   int boost_states, unsigned long *pstates, int *no)
 {
-	int i, psmax, pscur;
+	int i, psmax;
 	union core_pstate pstate;
 	unsigned long long val;
 
@@ -104,13 +104,6 @@ int decode_pstates(unsigned int cpu, unsigned int cpu_family,
 		return -1;
 
 	psmax = (val >> 4) & 0x7;
-
-	if (read_msr(cpu, MSR_AMD_PSTATE_STATUS, &val))
-		return -1;
-
-	pscur = val & 0x7;
-
-	pscur += boost_states;
 	psmax += boost_states;
 	for (i = 0; i <= psmax; i++) {
 		if (i >= MAX_HW_PSTATES) {