When exiting from loongson2_exit(), we need to reset the counter
register too, this patch adds a function reset_counters() to do it, by
the way, this function will be shared by Perf.
Signed-off-by: Wu Zhangjin <wuzhangjin@xxxxxxxxx>
---
arch/mips/oprofile/op_model_loongson2.c | 8 +++++++-
1 files changed, 7 insertions(+), 1 deletions(-)
diff --git a/arch/mips/oprofile/op_model_loongson2.c b/arch/mips/oprofile/op_model_loongson2.c
index fa3bf66..01f91a3 100644
--- a/arch/mips/oprofile/op_model_loongson2.c
+++ b/arch/mips/oprofile/op_model_loongson2.c
@@ -51,6 +51,12 @@ static char *oprofid = "LoongsonPerf";
static irqreturn_t loongson2_perfcount_handler(int irq, void *dev_id);
/* Compute all of the registers in preparation for enabling profiling. */
+static void reset_counters(void *arg)
+{
+ write_c0_perfctrl(0);
+ write_c0_perfcnt(0);
+}
+
static void loongson2_reg_setup(struct op_counter_config *cfg)
{
unsigned int ctrl = 0;
@@ -157,7 +163,7 @@ static int __init loongson2_init(void)
static void loongson2_exit(void)
{
- write_c0_perfctrl(0);
+ reset_counters(NULL);
free_irq(LOONGSON2_PERFCNT_IRQ, oprofid);
}
--
1.7.0
