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- From 88bb1794592e3fe9c8d65ce73ee851e11dbbd26b Mon Sep 17 00:00:00 2001
- From: John Crispin <[email protected]>
- Date: Wed, 24 Aug 2011 13:24:11 +0200
- Subject: [PATCH 09/24] MIPS: make oprofile use cp0_perfcount_irq if it is set
- The patch makes the oprofile code use the performance counters irq.
- This patch is written by Felix Fietkau.
- Signed-off-by: Felix Fietkau <[email protected]>
- Signed-off-by: John Crispin <[email protected]>
- Cc: [email protected]
- ---
- arch/mips/oprofile/op_model_mipsxx.c | 12 ++++++++++++
- 1 files changed, 12 insertions(+), 0 deletions(-)
- diff --git a/arch/mips/oprofile/op_model_mipsxx.c b/arch/mips/oprofile/op_model_mipsxx.c
- index 54759f1..86cf234 100644
- --- a/arch/mips/oprofile/op_model_mipsxx.c
- +++ b/arch/mips/oprofile/op_model_mipsxx.c
- @@ -298,6 +298,11 @@ static void reset_counters(void *arg)
- }
- }
-
- +static irqreturn_t mipsxx_perfcount_int(int irq, void *dev_id)
- +{
- + return mipsxx_perfcount_handler();
- +}
- +
- static int __init mipsxx_init(void)
- {
- int counters;
- @@ -374,6 +379,10 @@ static int __init mipsxx_init(void)
- save_perf_irq = perf_irq;
- perf_irq = mipsxx_perfcount_handler;
-
- + if (cp0_perfcount_irq >= 0)
- + return request_irq(cp0_perfcount_irq, mipsxx_perfcount_int,
- + IRQF_SHARED, "Perfcounter", save_perf_irq);
- +
- return 0;
- }
-
- @@ -381,6 +390,9 @@ static void mipsxx_exit(void)
- {
- int counters = op_model_mipsxx_ops.num_counters;
-
- + if (cp0_perfcount_irq >= 0)
- + free_irq(cp0_perfcount_irq, save_perf_irq);
- +
- counters = counters_per_cpu_to_total(counters);
- on_each_cpu(reset_counters, (void *)(long)counters, 1);
-
- --
- 1.7.5.4
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