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CC: Will Deacon Signed-off-by: Yury Norov --- drivers/perf/arm-cci.c | 24 ++++++------------------ drivers/perf/arm-ccn.c | 10 ++-------- drivers/perf/arm_dmc620_pmu.c | 9 ++------- drivers/perf/arm_pmuv3.c | 8 ++------ 4 files changed, 12 insertions(+), 39 deletions(-) diff --git a/drivers/perf/arm-cci.c b/drivers/perf/arm-cci.c index 61de861eaf91..cb15b4cee5f7 100644 --- a/drivers/perf/arm-cci.c +++ b/drivers/perf/arm-cci.c @@ -320,12 +320,9 @@ static int cci400_get_event_idx(struct cci_pmu *cci_pmu, return CCI400_PMU_CYCLE_CNTR_IDX; } - for (idx = CCI400_PMU_CNTR0_IDX; idx <= CCI_PMU_CNTR_LAST(cci_pmu); ++idx) - if (!test_and_set_bit(idx, hw->used_mask)) - return idx; - - /* No counters available */ - return -EAGAIN; + idx = find_and_set_next_bit(hw->used_mask, CCI_PMU_CNTR_LAST(cci_pmu) + 1, + CCI400_PMU_CNTR0_IDX); + return idx < CCI_PMU_CNTR_LAST(cci_pmu) + 1 ? idx : -EAGAIN; } static int cci400_validate_hw_event(struct cci_pmu *cci_pmu, unsigned long hw_event) @@ -802,13 +799,8 @@ static int pmu_get_event_idx(struct cci_pmu_hw_events *hw, struct perf_event *ev if (cci_pmu->model->get_event_idx) return cci_pmu->model->get_event_idx(cci_pmu, hw, cci_event); - /* Generic code to find an unused idx from the mask */ - for (idx = 0; idx <= CCI_PMU_CNTR_LAST(cci_pmu); idx++) - if (!test_and_set_bit(idx, hw->used_mask)) - return idx; - - /* No counters available */ - return -EAGAIN; + idx = find_and_set_bit(hw->used_mask, CCI_PMU_CNTR_LAST(cci_pmu) + 1); + return idx < CCI_PMU_CNTR_LAST(cci_pmu) + 1 ? idx : -EAGAIN; } static int pmu_map_event(struct perf_event *event) @@ -861,12 +853,8 @@ static void pmu_free_irq(struct cci_pmu *cci_pmu) { int i; - for (i = 0; i < cci_pmu->nr_irqs; i++) { - if (!test_and_clear_bit(i, &cci_pmu->active_irqs)) - continue; - + for_each_test_and_clear_bit(i, &cci_pmu->active_irqs, cci_pmu->nr_irqs) free_irq(cci_pmu->irqs[i], cci_pmu); - } } static u32 pmu_read_counter(struct perf_event *event) diff --git a/drivers/perf/arm-ccn.c b/drivers/perf/arm-ccn.c index 728d13d8e98a..d657701b1f23 100644 --- a/drivers/perf/arm-ccn.c +++ b/drivers/perf/arm-ccn.c @@ -589,15 +589,9 @@ static const struct attribute_group *arm_ccn_pmu_attr_groups[] = { static int arm_ccn_pmu_alloc_bit(unsigned long *bitmap, unsigned long size) { - int bit; - - do { - bit = find_first_zero_bit(bitmap, size); - if (bit >= size) - return -EAGAIN; - } while (test_and_set_bit(bit, bitmap)); + int bit = find_and_set_bit(bitmap, size); - return bit; + return bit < size ? bit : -EAGAIN; } /* All RN-I and RN-D nodes have identical PMUs */ diff --git a/drivers/perf/arm_dmc620_pmu.c b/drivers/perf/arm_dmc620_pmu.c index 30cea6859574..e41c84dabc3e 100644 --- a/drivers/perf/arm_dmc620_pmu.c +++ b/drivers/perf/arm_dmc620_pmu.c @@ -303,13 +303,8 @@ static int dmc620_get_event_idx(struct perf_event *event) end_idx = DMC620_PMU_MAX_COUNTERS; } - for (idx = start_idx; idx < end_idx; ++idx) { - if (!test_and_set_bit(idx, dmc620_pmu->used_mask)) - return idx; - } - - /* The counters are all in use. */ - return -EAGAIN; + idx = find_and_set_next_bit(dmc620_pmu->used_mask, end_idx, start_idx); + return idx < end_idx ? idx : -EAGAIN; } static inline diff --git a/drivers/perf/arm_pmuv3.c b/drivers/perf/arm_pmuv3.c index 6ca7be05229c..f046ad9e71f1 100644 --- a/drivers/perf/arm_pmuv3.c +++ b/drivers/perf/arm_pmuv3.c @@ -825,13 +825,9 @@ static irqreturn_t armv8pmu_handle_irq(struct arm_pmu *cpu_pmu) static int armv8pmu_get_single_idx(struct pmu_hw_events *cpuc, struct arm_pmu *cpu_pmu) { - int idx; + int idx = find_and_set_next_bit(cpuc->used_mask, cpu_pmu->num_events, ARMV8_IDX_COUNTER0); - for (idx = ARMV8_IDX_COUNTER0; idx < cpu_pmu->num_events; idx++) { - if (!test_and_set_bit(idx, cpuc->used_mask)) - return idx; - } - return -EAGAIN; + return idx < cpu_pmu->num_events ? idx : -EAGAIN; } static int armv8pmu_get_chain_idx(struct pmu_hw_events *cpuc, -- 2.40.1 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id CBFF9C4167B for ; Sun, 3 Dec 2023 19:33:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Switch subsystem to use atomic find_bit() or atomic iterators as appropriate. CC: Will Deacon Signed-off-by: Yury Norov --- drivers/perf/arm-cci.c | 24 ++++++------------------ drivers/perf/arm-ccn.c | 10 ++-------- drivers/perf/arm_dmc620_pmu.c | 9 ++------- drivers/perf/arm_pmuv3.c | 8 ++------ 4 files changed, 12 insertions(+), 39 deletions(-) diff --git a/drivers/perf/arm-cci.c b/drivers/perf/arm-cci.c index 61de861eaf91..cb15b4cee5f7 100644 --- a/drivers/perf/arm-cci.c +++ b/drivers/perf/arm-cci.c @@ -320,12 +320,9 @@ static int cci400_get_event_idx(struct cci_pmu *cci_pmu, return CCI400_PMU_CYCLE_CNTR_IDX; } - for (idx = CCI400_PMU_CNTR0_IDX; idx <= CCI_PMU_CNTR_LAST(cci_pmu); ++idx) - if (!test_and_set_bit(idx, hw->used_mask)) - return idx; - - /* No counters available */ - return -EAGAIN; + idx = find_and_set_next_bit(hw->used_mask, CCI_PMU_CNTR_LAST(cci_pmu) + 1, + CCI400_PMU_CNTR0_IDX); + return idx < CCI_PMU_CNTR_LAST(cci_pmu) + 1 ? idx : -EAGAIN; } static int cci400_validate_hw_event(struct cci_pmu *cci_pmu, unsigned long hw_event) @@ -802,13 +799,8 @@ static int pmu_get_event_idx(struct cci_pmu_hw_events *hw, struct perf_event *ev if (cci_pmu->model->get_event_idx) return cci_pmu->model->get_event_idx(cci_pmu, hw, cci_event); - /* Generic code to find an unused idx from the mask */ - for (idx = 0; idx <= CCI_PMU_CNTR_LAST(cci_pmu); idx++) - if (!test_and_set_bit(idx, hw->used_mask)) - return idx; - - /* No counters available */ - return -EAGAIN; + idx = find_and_set_bit(hw->used_mask, CCI_PMU_CNTR_LAST(cci_pmu) + 1); + return idx < CCI_PMU_CNTR_LAST(cci_pmu) + 1 ? idx : -EAGAIN; } static int pmu_map_event(struct perf_event *event) @@ -861,12 +853,8 @@ static void pmu_free_irq(struct cci_pmu *cci_pmu) { int i; - for (i = 0; i < cci_pmu->nr_irqs; i++) { - if (!test_and_clear_bit(i, &cci_pmu->active_irqs)) - continue; - + for_each_test_and_clear_bit(i, &cci_pmu->active_irqs, cci_pmu->nr_irqs) free_irq(cci_pmu->irqs[i], cci_pmu); - } } static u32 pmu_read_counter(struct perf_event *event) diff --git a/drivers/perf/arm-ccn.c b/drivers/perf/arm-ccn.c index 728d13d8e98a..d657701b1f23 100644 --- a/drivers/perf/arm-ccn.c +++ b/drivers/perf/arm-ccn.c @@ -589,15 +589,9 @@ static const struct attribute_group *arm_ccn_pmu_attr_groups[] = { static int arm_ccn_pmu_alloc_bit(unsigned long *bitmap, unsigned long size) { - int bit; - - do { - bit = find_first_zero_bit(bitmap, size); - if (bit >= size) - return -EAGAIN; - } while (test_and_set_bit(bit, bitmap)); + int bit = find_and_set_bit(bitmap, size); - return bit; + return bit < size ? bit : -EAGAIN; } /* All RN-I and RN-D nodes have identical PMUs */ diff --git a/drivers/perf/arm_dmc620_pmu.c b/drivers/perf/arm_dmc620_pmu.c index 30cea6859574..e41c84dabc3e 100644 --- a/drivers/perf/arm_dmc620_pmu.c +++ b/drivers/perf/arm_dmc620_pmu.c @@ -303,13 +303,8 @@ static int dmc620_get_event_idx(struct perf_event *event) end_idx = DMC620_PMU_MAX_COUNTERS; } - for (idx = start_idx; idx < end_idx; ++idx) { - if (!test_and_set_bit(idx, dmc620_pmu->used_mask)) - return idx; - } - - /* The counters are all in use. */ - return -EAGAIN; + idx = find_and_set_next_bit(dmc620_pmu->used_mask, end_idx, start_idx); + return idx < end_idx ? idx : -EAGAIN; } static inline diff --git a/drivers/perf/arm_pmuv3.c b/drivers/perf/arm_pmuv3.c index 6ca7be05229c..f046ad9e71f1 100644 --- a/drivers/perf/arm_pmuv3.c +++ b/drivers/perf/arm_pmuv3.c @@ -825,13 +825,9 @@ static irqreturn_t armv8pmu_handle_irq(struct arm_pmu *cpu_pmu) static int armv8pmu_get_single_idx(struct pmu_hw_events *cpuc, struct arm_pmu *cpu_pmu) { - int idx; + int idx = find_and_set_next_bit(cpuc->used_mask, cpu_pmu->num_events, ARMV8_IDX_COUNTER0); - for (idx = ARMV8_IDX_COUNTER0; idx < cpu_pmu->num_events; idx++) { - if (!test_and_set_bit(idx, cpuc->used_mask)) - return idx; - } - return -EAGAIN; + return idx < cpu_pmu->num_events ? idx : -EAGAIN; } static int armv8pmu_get_chain_idx(struct pmu_hw_events *cpuc, -- 2.40.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel