ftrace: timestamp syncing, prepare

rename and uninline now() to ftrace_now().

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

7 files changed, 16 insertions, 14 deletions

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 97c40865a93e..a15e068535f8 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -531,7 +531,7 @@ static int notrace __ftrace_update_code(void *ignore)
         save_ftrace_enabled = ftrace_enabled;
         ftrace_enabled = 0;
 
-        start = now(raw_smp_processor_id());
+        start = ftrace_now(raw_smp_processor_id());
         ftrace_update_cnt = 0;
 
         /* No locks needed, the machine is stopped! */
@@ -550,7 +550,7 @@ static int notrace __ftrace_update_code(void *ignore)
 
         }
 
-        stop = now(raw_smp_processor_id());
+        stop = ftrace_now(raw_smp_processor_id());
         ftrace_update_time = stop - start;
         ftrace_update_tot_cnt += ftrace_update_cnt;
 
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 4550afda9607..e3778ab0d3f7 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -42,6 +42,11 @@ ns2usecs(cycle_t nsec)
         return nsec;
 }
 
+notrace cycle_t ftrace_now(int cpu)
+{
+        return cpu_clock(cpu);
+}
+
 static atomic_t                 tracer_counter;
 static struct trace_array       global_trace;
 
@@ -607,7 +612,7 @@ tracing_generic_entry_update(struct trace_entry *entry, unsigned long flags)
         entry->idx              = atomic_inc_return(&tracer_counter);
         entry->preempt_count    = pc & 0xff;
         entry->pid              = tsk->pid;
-        entry->t                = now(raw_smp_processor_id());
+        entry->t                = ftrace_now(raw_smp_processor_id());
         entry->flags = (irqs_disabled_flags(flags) ? TRACE_FLAG_IRQS_OFF : 0) |
                 ((pc & HARDIRQ_MASK) ? TRACE_FLAG_HARDIRQ : 0) |
                 ((pc & SOFTIRQ_MASK) ? TRACE_FLAG_SOFTIRQ : 0) |
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index b0408356f0e0..30cad677e9d0 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -171,10 +171,7 @@ void update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu);
 void update_max_tr_single(struct trace_array *tr,
                           struct task_struct *tsk, int cpu);
 
-static inline notrace cycle_t now(int cpu)
-{
-        return cpu_clock(cpu);
-}
+extern notrace cycle_t ftrace_now(int cpu);
 
 #ifdef CONFIG_SCHED_TRACER
 extern void notrace
diff --git a/kernel/trace/trace_functions.c b/kernel/trace/trace_functions.c
index 5d8ad7a09605..e5d34b78fc99 100644
--- a/kernel/trace/trace_functions.c
+++ b/kernel/trace/trace_functions.c
@@ -20,7 +20,7 @@ static notrace void function_reset(struct trace_array *tr)
 {
         int cpu;
 
-        tr->time_start = now(tr->cpu);
+        tr->time_start = ftrace_now(tr->cpu);
 
         for_each_online_cpu(cpu)
                 tracing_reset(tr->data[cpu]);
diff --git a/kernel/trace/trace_irqsoff.c b/kernel/trace/trace_irqsoff.c
index 2dfebb67fdfb..d2a6e6f1ad2d 100644
--- a/kernel/trace/trace_irqsoff.c
+++ b/kernel/trace/trace_irqsoff.c
@@ -136,7 +136,7 @@ check_critical_timing(struct trace_array *tr,
          * as long as possible:
          */
         T0 = data->preempt_timestamp;
-        T1 = now(cpu);
+        T1 = ftrace_now(cpu);
         delta = T1-T0;
 
         local_save_flags(flags);
@@ -186,7 +186,7 @@ out_unlock:
 
 out:
         data->critical_sequence = max_sequence;
-        data->preempt_timestamp = now(cpu);
+        data->preempt_timestamp = ftrace_now(cpu);
         tracing_reset(data);
         ftrace(tr, data, CALLER_ADDR0, parent_ip, flags);
 }
@@ -215,7 +215,7 @@ start_critical_timing(unsigned long ip, unsigned long parent_ip)
         atomic_inc(&data->disabled);
 
         data->critical_sequence = max_sequence;
-        data->preempt_timestamp = now(cpu);
+        data->preempt_timestamp = ftrace_now(cpu);
         data->critical_start = parent_ip ? : ip;
         tracing_reset(data);
 
diff --git a/kernel/trace/trace_sched_switch.c b/kernel/trace/trace_sched_switch.c
index 6c9284103a62..8d656672da93 100644
--- a/kernel/trace/trace_sched_switch.c
+++ b/kernel/trace/trace_sched_switch.c
@@ -61,7 +61,7 @@ static notrace void sched_switch_reset(struct trace_array *tr)
 {
         int cpu;
 
-        tr->time_start = now(tr->cpu);
+        tr->time_start = ftrace_now(tr->cpu);
 
         for_each_online_cpu(cpu)
                 tracing_reset(tr->data[cpu]);
diff --git a/kernel/trace/trace_sched_wakeup.c b/kernel/trace/trace_sched_wakeup.c
index 688df965f3f2..b7df825c3af9 100644
--- a/kernel/trace/trace_sched_wakeup.c
+++ b/kernel/trace/trace_sched_wakeup.c
@@ -92,7 +92,7 @@ wakeup_sched_switch(struct task_struct *prev, struct task_struct *next)
          * as long as possible:
          */
         T0 = data->preempt_timestamp;
-        T1 = now(cpu);
+        T1 = ftrace_now(cpu);
         delta = T1-T0;
 
         if (!report_latency(delta))
@@ -191,7 +191,7 @@ wakeup_check_start(struct trace_array *tr, struct task_struct *p,
 
         local_save_flags(flags);
 
-        tr->data[wakeup_cpu]->preempt_timestamp = now(cpu);
+        tr->data[wakeup_cpu]->preempt_timestamp = ftrace_now(cpu);
         ftrace(tr, tr->data[wakeup_cpu], CALLER_ADDR1, CALLER_ADDR2, flags);
 
 out_locked: