From d249a02d441998c43aeb1755c85cffb062628500 Mon Sep 17 00:00:00 2001
Message-Id: <d249a02d441998c43aeb1755c85cffb062628500.1528226387.git.Jim.Somerville@windriver.com>
In-Reply-To: <c8270e79f6b7008fde44b8d5aa6314d8cf89d3ed.1528226387.git.Jim.Somerville@windriver.com>
References: <c8270e79f6b7008fde44b8d5aa6314d8cf89d3ed.1528226387.git.Jim.Somerville@windriver.com>
From: Jim Somerville <Jim.Somerville@windriver.com>
Date: Thu, 22 Dec 2016 17:54:11 -0500
Subject: [PATCH 14/32] Add missing ifdef around max latency variable
Signed-off-by: Jim Somerville <Jim.Somerville@windriver.com>
---
kernel/trace/trace_hwlat.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/kernel/trace/trace_hwlat.c b/kernel/trace/trace_hwlat.c
index 4b30d8b..1bb578c 100644
--- a/kernel/trace/trace_hwlat.c
+++ b/kernel/trace/trace_hwlat.c
@@ -167,7 +167,9 @@ void trace_hwlat_callback(bool enter)
*/
static int get_sample(void)
{
+#ifdef CONFIG_TRACER_MAX_TRACE
struct trace_array *tr = hwlat_trace;
+#endif
time_type start, t1, t2, last_t2;
s64 diff, total, last_total = 0;
u64 sample = 0;
@@ -254,9 +256,11 @@ static int get_sample(void)
s.nmi_count = nmi_count;
trace_hwlat_sample(&s);
+#ifdef CONFIG_TRACER_MAX_TRACE
/* Keep a running maximum ever recorded hardware latency */
if (sample > tr->max_latency)
tr->max_latency = sample;
+#endif
}
out:
@@ -582,7 +586,9 @@ static int hwlat_tracer_init(struct trace_array *tr)
disable_migrate = false;
hwlat_data.count = 0;
+#ifdef CONFIG_TRACER_MAX_TRACE
tr->max_latency = 0;
+#endif
save_tracing_thresh = tracing_thresh;
/* tracing_thresh is in nsecs, we speak in usecs */
--
1.8.3.1