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Subject[PATCH] powerpc/perf: Fix for core/nest imc call trace on cpuhotplug
Date
Nest/core pmu units are enabled only when it is used. A reference count is
maintained for the events which uses the nest/core pmu units. Currently in
*_imc_counters_release function a WARN() is used for notification of any
underflow of ref count. Replace WARN() with a pr_info since it is an overkill.

Signed-off-by: Anju T Sudhakar <anju@linux.vnet.ibm.com>
Acked-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
---
arch/powerpc/perf/imc-pmu.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/perf/imc-pmu.c b/arch/powerpc/perf/imc-pmu.c
index 9ccac86..4d523d0 100644
--- a/arch/powerpc/perf/imc-pmu.c
+++ b/arch/powerpc/perf/imc-pmu.c
@@ -409,7 +409,7 @@ static void nest_imc_counters_release(struct perf_event *event)
return;
}
} else if (ref->refc < 0) {
- WARN(1, "nest-imc: Invalid event reference count\n");
+ pr_info("nest-imc: Invalid event reference count\n");
ref->refc = 0;
}
mutex_unlock(&ref->lock);
@@ -656,7 +656,7 @@ static void core_imc_counters_release(struct perf_event *event)
return;
}
} else if (ref->refc < 0) {
- WARN(1, "core-imc: Invalid event reference count\n");
+ pr_info("core-imc: Invalid event reference count\n");
ref->refc = 0;
}
mutex_unlock(&ref->lock);
--
2.7.4
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