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perf/arm-cci: Use the bitmap API to allocate bitmaps

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Use devm_bitmap_zalloc() instead of hand-writing it.
It is less verbose and it improves the semantic.

While at it, use bitmap_zero() instead of hand-writing it.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/fbde85a5e8ae99b10a2115d8ea1e69320a62947f.1657084786.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Christophe JAILLET 2022-07-06 07:20:15 +02:00 committed by Will Deacon
parent e9a023f2b7
commit 0e35850b34
1 changed files with 4 additions and 5 deletions
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9
drivers/perf/arm-cci.c
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@ -1261,7 +1261,7 @@ static int validate_group(struct perf_event *event)
*/
.used_mask = mask,
};
memset(mask, 0, BITS_TO_LONGS(cci_pmu->num_cntrs) * sizeof(unsigned long));
bitmap_zero(mask, cci_pmu->num_cntrs);
if (!validate_event(event->pmu, &fake_pmu, leader))
return -EINVAL;
@ -1629,10 +1629,9 @@ static struct cci_pmu *cci_pmu_alloc(struct device *dev)
GFP_KERNEL);
if (!cci_pmu->hw_events.events)
return ERR_PTR(-ENOMEM);
cci_pmu->hw_events.used_mask = devm_kcalloc(dev,
BITS_TO_LONGS(CCI_PMU_MAX_HW_CNTRS(model)),
sizeof(*cci_pmu->hw_events.used_mask),
GFP_KERNEL);
cci_pmu->hw_events.used_mask = devm_bitmap_zalloc(dev,
CCI_PMU_MAX_HW_CNTRS(model),
GFP_KERNEL);
if (!cci_pmu->hw_events.used_mask)
return ERR_PTR(-ENOMEM);