From 88bb1794592e3fe9c8d65ce73ee851e11dbbd26b Mon Sep 17 00:00:00 2001 From: John Crispin 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 Signed-off-by: John Crispin Cc: linux-mips@linux-mips.org --- 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