ftrace: make work with new ring buffer

This patch ports ftrace over to the new ring buffer.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 9 insertions, 7 deletions

diff --git a/kernel/trace/trace_boot.c b/kernel/trace/trace_boot.c
index d5c9e2e4a9c4..3657eec6b87d 100644
--- a/kernel/trace/trace_boot.c
+++ b/kernel/trace/trace_boot.c
@@ -34,7 +34,7 @@ static void boot_trace_init(struct trace_array *tr)
         trace_boot_enabled = 0;
 
         for_each_cpu_mask(cpu, cpu_possible_map)
-                tracing_reset(tr->data[cpu]);
+                tracing_reset(tr, cpu);
 }
 
 static void boot_trace_ctrl_update(struct trace_array *tr)
@@ -74,6 +74,7 @@ struct tracer boot_tracer __read_mostly =
 
 void trace_boot(struct boot_trace *it)
 {
+        struct ring_buffer_event *event;
         struct trace_entry *entry;
         struct trace_array_cpu *data;
         unsigned long irq_flags;
@@ -85,17 +86,18 @@ void trace_boot(struct boot_trace *it)
         preempt_disable();
         data = tr->data[smp_processor_id()];
 
-        raw_local_irq_save(irq_flags);
-        __raw_spin_lock(&data->lock);
-
-        entry = tracing_get_trace_entry(tr, data);
+        event = ring_buffer_lock_reserve(tr->buffer, sizeof(*entry),
+                                         &irq_flags);
+        if (!event)
+                goto out;
+        entry   = ring_buffer_event_data(event);
         tracing_generic_entry_update(entry, 0);
         entry->type = TRACE_BOOT;
         entry->field.initcall = *it;
+        ring_buffer_unlock_commit(tr->buffer, event, irq_flags);
 
-        __raw_spin_unlock(&data->lock);
-        raw_local_irq_restore(irq_flags);
         trace_wake_up();
 
+ out:
         preempt_enable();
 }