linux-kernel - [PATCH v2 02/12] perf: arm_pmuv3: Drop unnecessary IS_ENABLED(CONFIG

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Date: Wed, 26 Jun 2024 16:32:26 -0600
From: "Rob Herring (Arm)" <robh@...nel.org>
To: Russell King <linux@...linux.org.uk>, 
 Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
 Arnaldo Carvalho de Melo <acme@...nel.org>, 
 Namhyung Kim <namhyung@...nel.org>, Mark Rutland <mark.rutland@....com>, 
 Alexander Shishkin <alexander.shishkin@...ux.intel.com>, 
 Jiri Olsa <jolsa@...nel.org>, Ian Rogers <irogers@...gle.com>, 
 Adrian Hunter <adrian.hunter@...el.com>, Will Deacon <will@...nel.org>, 
 Marc Zyngier <maz@...nel.org>, Oliver Upton <oliver.upton@...ux.dev>, 
 James Morse <james.morse@....com>, 
 Suzuki K Poulose <suzuki.poulose@....com>, 
 Zenghui Yu <yuzenghui@...wei.com>, 
 Catalin Marinas <catalin.marinas@....com>, 
 James Clark <james.clark@....com>
Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 linux-perf-users@...r.kernel.org, kvmarm@...ts.linux.dev
Subject: [PATCH v2 02/12] perf: arm_pmuv3: Drop unnecessary
 IS_ENABLED(CONFIG_ARM64) check

The IS_ENABLED(CONFIG_ARM64) check for threshold support is unnecessary.
The purpose is to not enable thresholds on arm32, but if threshold is
non-zero, the check against threshold_max() just above here will have
errored out because threshold_max() is always 0 on arm32.

Signed-off-by: Rob Herring (Arm) <robh@...nel.org>
---
v2:
 - new patch
---
 drivers/perf/arm_pmuv3.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/perf/arm_pmuv3.c b/drivers/perf/arm_pmuv3.c
index 8ed5c3358920..3e51cd7062b9 100644
--- a/drivers/perf/arm_pmuv3.c
+++ b/drivers/perf/arm_pmuv3.c
@@ -1045,7 +1045,7 @@ static int armv8pmu_set_event_filter(struct hw_perf_event *event,
 		return -EINVAL;
 	}
 
-	if (IS_ENABLED(CONFIG_ARM64) && th) {
+	if (th) {
 		config_base |= FIELD_PREP(ARMV8_PMU_EVTYPE_TH, th);
 		config_base |= FIELD_PREP(ARMV8_PMU_EVTYPE_TC,
 					  armv8pmu_event_threshold_control(attr));

-- 
2.43.0