[PATCH 1/2] cpufreq/amd-pstate: Use FIELD_MODIFY()

[Hans Zhang]

Use FIELD_MODIFY() to remove open-coded bit manipulation.
No functional change intended.

Signed-off-by: Hans Zhang <18255117159@xxxxxxx>
---
 drivers/cpufreq/amd-pstate.c | 26 ++++++++++----------------
 1 file changed, 10 insertions(+), 16 deletions(-)

diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c
index 453084c67327..1037d1722263 100644
--- a/drivers/cpufreq/amd-pstate.c
+++ b/drivers/cpufreq/amd-pstate.c
@@ -246,12 +246,10 @@ static int msr_update_perf(struct cpufreq_policy *policy, u8 min_perf,
 
 	value = prev = READ_ONCE(cpudata->cppc_req_cached);
 
-	value &= ~(AMD_CPPC_MAX_PERF_MASK | AMD_CPPC_MIN_PERF_MASK |
-		   AMD_CPPC_DES_PERF_MASK | AMD_CPPC_EPP_PERF_MASK);
-	value |= FIELD_PREP(AMD_CPPC_MAX_PERF_MASK, max_perf);
-	value |= FIELD_PREP(AMD_CPPC_DES_PERF_MASK, des_perf);
-	value |= FIELD_PREP(AMD_CPPC_MIN_PERF_MASK, min_perf);
-	value |= FIELD_PREP(AMD_CPPC_EPP_PERF_MASK, epp);
+	FIELD_MODIFY(AMD_CPPC_MAX_PERF_MASK, &value, max_perf);
+	FIELD_MODIFY(AMD_CPPC_DES_PERF_MASK, &value, des_perf);
+	FIELD_MODIFY(AMD_CPPC_MIN_PERF_MASK, &value, min_perf);
+	FIELD_MODIFY(AMD_CPPC_EPP_PERF_MASK, &value, epp);
 
 	if (trace_amd_pstate_epp_perf_enabled()) {
 		union perf_cached perf = READ_ONCE(cpudata->perf);
@@ -300,8 +298,7 @@ static int msr_set_epp(struct cpufreq_policy *policy, u8 epp)
 	int ret;
 
 	value = prev = READ_ONCE(cpudata->cppc_req_cached);
-	value &= ~AMD_CPPC_EPP_PERF_MASK;
-	value |= FIELD_PREP(AMD_CPPC_EPP_PERF_MASK, epp);
+	FIELD_MODIFY(AMD_CPPC_EPP_PERF_MASK, &value, epp);
 
 	if (trace_amd_pstate_epp_perf_enabled()) {
 		union perf_cached perf = cpudata->perf;
@@ -441,8 +438,7 @@ static int shmem_set_epp(struct cpufreq_policy *policy, u8 epp)
 	}
 
 	value = READ_ONCE(cpudata->cppc_req_cached);
-	value &= ~AMD_CPPC_EPP_PERF_MASK;
-	value |= FIELD_PREP(AMD_CPPC_EPP_PERF_MASK, epp);
+	FIELD_MODIFY(AMD_CPPC_EPP_PERF_MASK, &value, epp);
 	WRITE_ONCE(cpudata->cppc_req_cached, value);
 
 	return ret;
@@ -575,12 +571,10 @@ static int shmem_update_perf(struct cpufreq_policy *policy, u8 min_perf,
 
 	value = prev = READ_ONCE(cpudata->cppc_req_cached);
 
-	value &= ~(AMD_CPPC_MAX_PERF_MASK | AMD_CPPC_MIN_PERF_MASK |
-		   AMD_CPPC_DES_PERF_MASK | AMD_CPPC_EPP_PERF_MASK);
-	value |= FIELD_PREP(AMD_CPPC_MAX_PERF_MASK, max_perf);
-	value |= FIELD_PREP(AMD_CPPC_DES_PERF_MASK, des_perf);
-	value |= FIELD_PREP(AMD_CPPC_MIN_PERF_MASK, min_perf);
-	value |= FIELD_PREP(AMD_CPPC_EPP_PERF_MASK, epp);
+	FIELD_MODIFY(AMD_CPPC_MAX_PERF_MASK, &value, max_perf);
+	FIELD_MODIFY(AMD_CPPC_DES_PERF_MASK, &value, des_perf);
+	FIELD_MODIFY(AMD_CPPC_MIN_PERF_MASK, &value, min_perf);
+	FIELD_MODIFY(AMD_CPPC_EPP_PERF_MASK, &value, epp);
 
 	if (trace_amd_pstate_epp_perf_enabled()) {
 		union perf_cached perf = READ_ONCE(cpudata->perf);
-- 
2.34.1