diff options
| author | Robin Murphy <robin.murphy@arm.com> | 2025-05-12 18:11:54 +0100 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2025-05-16 15:18:58 +0100 |
| commit | 597704e201068db3d104de3c7a4d447ff8209127 (patch) | |
| tree | bb33e91f11dedc139912ca90a847053c72327f81 | |
| parent | 097469a2b0f12b91b4f27b9e9e4f2c46484cde30 (diff) | |
| download | linux-for-next/perf.tar.gz | |
perf/arm-cmn: Initialise cmn->cpu earlierfor-next/perf
For all the complexity of handling affinity for CPU hotplug, what we've
apparently managed to overlook is that arm_cmn_init_irqs() has in fact
always been setting the *initial* affinity of all IRQs to CPU 0, not the
CPU we subsequently choose for event scheduling. Oh dear.
Cc: stable@vger.kernel.org
Fixes: 0ba64770a2f2 ("perf: Add Arm CMN-600 PMU driver")
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Reviewed-by: Ilkka Koskinen <ilkka@os.amperecomputing.com>
Link: https://lore.kernel.org/r/b12fccba6b5b4d2674944f59e4daad91cd63420b.1747069914.git.robin.murphy@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
| -rw-r--r-- | drivers/perf/arm-cmn.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/perf/arm-cmn.c b/drivers/perf/arm-cmn.c index 83f4ef9852555a..668c581e932a14 100644 --- a/drivers/perf/arm-cmn.c +++ b/drivers/perf/arm-cmn.c @@ -2551,6 +2551,7 @@ static int arm_cmn_probe(struct platform_device *pdev) cmn->dev = &pdev->dev; cmn->part = (unsigned long)device_get_match_data(cmn->dev); + cmn->cpu = cpumask_local_spread(0, dev_to_node(cmn->dev)); platform_set_drvdata(pdev, cmn); if (cmn->part == PART_CMN600 && has_acpi_companion(cmn->dev)) { @@ -2578,7 +2579,6 @@ static int arm_cmn_probe(struct platform_device *pdev) if (err) return err; - cmn->cpu = cpumask_local_spread(0, dev_to_node(cmn->dev)); cmn->pmu = (struct pmu) { .module = THIS_MODULE, .parent = cmn->dev, |