target/linux/lantiq/patches/0009-MIPS-make-oprofile-use-cp0_perfcount_irq-if-it-is-se.patch

   1 From 88bb1794592e3fe9c8d65ce73ee851e11dbbd26b Mon Sep 17 00:00:00 2001
   2 From: John Crispin <blogic@openwrt.org>
   3 Date: Wed, 24 Aug 2011 13:24:11 +0200
   4 Subject: [PATCH 09/24] MIPS: make oprofile use cp0_perfcount_irq if it is set
   5
   6 The patch makes the oprofile code use the performance counters irq.
   7
   8 This patch is written by Felix Fietkau.
   9
  10 Signed-off-by: Felix Fietkau <nbd@openwrt.org>
  11 Signed-off-by: John Crispin <blogic@openwrt.org>
  12 Cc: linux-mips@linux-mips.org
  13 ---
  14  arch/mips/oprofile/op_model_mipsxx.c |   12 ++++++++++++
  15  1 files changed, 12 insertions(+), 0 deletions(-)
  16
  17 --- a/arch/mips/oprofile/op_model_mipsxx.c
  18 +++ b/arch/mips/oprofile/op_model_mipsxx.c
  19 @@ -303,6 +303,11 @@ static irqreturn_t mipsxx_perfcount_int(
  20         return mipsxx_perfcount_handler();
  21  }
  22
  23 +static irqreturn_t mipsxx_perfcount_int(int irq, void *dev_id)
  24 +{
  25 +       return mipsxx_perfcount_handler();
  26 +}
  27 +
  28  static int __init mipsxx_init(void)
  29  {
  30         int counters;
  31 @@ -383,6 +388,10 @@ static int __init mipsxx_init(void)
  32                 return request_irq(cp0_perfcount_irq, mipsxx_perfcount_int,
  33                         IRQF_SHARED, "Perfcounter", save_perf_irq);
  34
  35 +       if (cp0_perfcount_irq >= 0)
  36 +               return request_irq(cp0_perfcount_irq, mipsxx_perfcount_int,
  37 +                       IRQF_SHARED, "Perfcounter", save_perf_irq);
  38 +
  39         return 0;
  40  }
  41
  42 @@ -392,6 +401,9 @@ static void mipsxx_exit(void)
  43
  44         if (cp0_perfcount_irq >= 0)
  45                 free_irq(cp0_perfcount_irq, save_perf_irq);
  46 +
  47 +       if (cp0_perfcount_irq >= 0)
  48 +               free_irq(cp0_perfcount_irq, save_perf_irq);
  49
  50         counters = counters_per_cpu_to_total(counters);
  51         on_each_cpu(reset_counters, (void *)(long)counters, 1);