Merge branch 'tip/tracing/core' of git://git.kernel.org/pub/scm/linux/kernel/git...

[platform/adaptation/renesas_rcar/renesas_kernel.git] / kernel / trace / trace.c

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 5edf410..6af8d7b 100644 (file)
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -374,6 +374,21 @@ static int __init set_buf_size(char *str)
 }
 __setup("trace_buf_size=", set_buf_size);
 
+static int __init set_tracing_thresh(char *str)
+{
+       unsigned long threshhold;
+       int ret;
+
+       if (!str)
+               return 0;
+       ret = strict_strtoul(str, 0, &threshhold);
+       if (ret < 0)
+               return 0;
+       tracing_thresh = threshhold * 1000;
+       return 1;
+}
+__setup("tracing_thresh=", set_tracing_thresh);
+
 unsigned long nsecs_to_usecs(unsigned long nsecs)
 {
        return nsecs / 1000;
@@ -579,9 +594,10 @@ static ssize_t trace_seq_to_buffer(struct trace_seq *s, void *buf, size_t cnt)
 static arch_spinlock_t ftrace_max_lock =
        (arch_spinlock_t)__ARCH_SPIN_LOCK_UNLOCKED;
 
+unsigned long __read_mostly    tracing_thresh;
+
 #ifdef CONFIG_TRACER_MAX_TRACE
 unsigned long __read_mostly    tracing_max_latency;
-unsigned long __read_mostly    tracing_thresh;
 
 /*
  * Copy the new maximum trace into the separate maximum-trace
@@ -592,7 +608,7 @@ static void
 __update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu)
 {
        struct trace_array_cpu *data = tr->data[cpu];
-       struct trace_array_cpu *max_data = tr->data[cpu];
+       struct trace_array_cpu *max_data;
 
        max_tr.cpu = cpu;
        max_tr.time_start = data->preempt_timestamp;
@@ -602,7 +618,7 @@ __update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu)
        max_data->critical_start = data->critical_start;
        max_data->critical_end = data->critical_end;
 
-       memcpy(data->comm, tsk->comm, TASK_COMM_LEN);
+       memcpy(max_data->comm, tsk->comm, TASK_COMM_LEN);
        max_data->pid = tsk->pid;
        max_data->uid = task_uid(tsk);
        max_data->nice = tsk->static_prio - 20 - MAX_RT_PRIO;
@@ -4249,10 +4265,10 @@ static __init int tracer_init_debugfs(void)
 #ifdef CONFIG_TRACER_MAX_TRACE
        trace_create_file("tracing_max_latency", 0644, d_tracer,
                        &tracing_max_latency, &tracing_max_lat_fops);
+#endif
 
        trace_create_file("tracing_thresh", 0644, d_tracer,
                        &tracing_thresh, &tracing_max_lat_fops);
-#endif
 
        trace_create_file("README", 0444, d_tracer,
                        NULL, &tracing_readme_fops);