linux-kernel - [tip: perf/core] perf/x86: Remove unused PERF_PMU_CAP_HETEROGENEOUS

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Message-ID: <169079877138.28540.11383129464821949118.tip-bot2@tip-bot2>
Date:   Mon, 31 Jul 2023 10:19:31 -0000
From:   "tip-bot2 for James Clark" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     James Clark <james.clark@....com>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Ian Rogers <irogers@...gle.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: perf/core] perf/x86: Remove unused
 PERF_PMU_CAP_HETEROGENEOUS_CPUS capability

The following commit has been merged into the perf/core branch of tip:

Commit-ID:     4b36873b4a3455590f686903c354c4716e149c74
Gitweb:        https://git.kernel.org/tip/4b36873b4a3455590f686903c354c4716e149c74
Author:        James Clark <james.clark@....com>
AuthorDate:    Mon, 24 Jul 2023 14:44:57 +01:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Wed, 26 Jul 2023 12:28:46 +02:00

perf/x86: Remove unused PERF_PMU_CAP_HETEROGENEOUS_CPUS capability

Since commit bd2756811766 ("perf: Rewrite core context handling") the
relationship between perf_event_context and PMUs has changed so that
the error scenario that PERF_PMU_CAP_HETEROGENEOUS_CPUS originally
silenced no longer exists.

Remove the capability to avoid confusion that it actually influences
any perf core behavior. This change should be a no-op.

Signed-off-by: James Clark <james.clark@....com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Acked-by: Ian Rogers <irogers@...gle.com>
Link: https://lore.kernel.org/r/20230724134500.970496-3-james.clark@arm.com
---
 arch/x86/events/core.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c
index 23c9642..185f902 100644
--- a/arch/x86/events/core.c
+++ b/arch/x86/events/core.c
@@ -2166,7 +2166,6 @@ static int __init init_hw_perf_events(void)
 			hybrid_pmu->pmu = pmu;
 			hybrid_pmu->pmu.type = -1;
 			hybrid_pmu->pmu.attr_update = x86_pmu.attr_update;
-			hybrid_pmu->pmu.capabilities |= PERF_PMU_CAP_HETEROGENEOUS_CPUS;
 			hybrid_pmu->pmu.capabilities |= PERF_PMU_CAP_EXTENDED_HW_TYPE;
 
 			err = perf_pmu_register(&hybrid_pmu->pmu, hybrid_pmu->name,