Merge tag 'trace-v4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull tracking updates from Steven Rostedt:
 "Most of the changes are clean ups and small fixes.  Some of them have
  stable tags to them.  I searched through my INBOX just as the merge
  window opened and found lots of patches to pull.  I ran them through
  all my tests and they were in linux-next for a few days.

  Features added this release:
  ----------------------------

   - Module globbing.  You can now filter function tracing to several
     modules.  # echo '*:mod:*snd*' > set_ftrace_filter (Dmitry Safonov)

   - Tracer specific options are now visible even when the tracer is not
     active.  It was rather annoying that you can only see and modify
     tracer options after enabling the tracer.  Now they are in the
     options/ directory even when the tracer is not active.  Although
     they are still only visible when the tracer is active in the
     trace_options file.

   - Trace options are now per instance (although some of the tracer
     specific options are global)

   - New tracefs file: set_event_pid.  If any pid is added to this file,
     then all events in the instance will filter out events that are not
     part of this pid.  sched_switch and sched_wakeup events handle next
     and the wakee pids"

* tag 'trace-v4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (68 commits)
  tracefs: Fix refcount imbalance in start_creating()
  tracing: Put back comma for empty fields in boot string parsing
  tracing: Apply tracer specific options from kernel command line.
  tracing: Add some documentation about set_event_pid
  ring_buffer: Remove unneeded smp_wmb() before wakeup of reader benchmark
  tracing: Allow dumping traces without tracking trace started cpus
  ring_buffer: Fix more races when terminating the producer in the benchmark
  ring_buffer: Do no not complete benchmark reader too early
  tracing: Remove redundant TP_ARGS redefining
  tracing: Rename max_stack_lock to stack_trace_max_lock
  tracing: Allow arch-specific stack tracer
  recordmcount: arm64: Replace the ignored mcount call into nop
  recordmcount: Fix endianness handling bug for nop_mcount
  tracepoints: Fix documentation of RCU lockdep checks
  tracing: ftrace_event_is_function() can return boolean
  tracing: is_legal_op() can return boolean
  ring-buffer: rb_event_is_commit() can return boolean
  ring-buffer: rb_per_cpu_empty() can return boolean
  ring_buffer: ring_buffer_empty{cpu}() can return boolean
  ring-buffer: rb_is_reader_page() can return boolean
  ...

1 files changed, 10 insertions, 10 deletions

diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index fc347f8b1bca..75f1d05ea82d 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -829,7 +829,7 @@ rb_is_head_page(struct ring_buffer_per_cpu *cpu_buffer,
  * writer is ever on it, the previous pointer never points
  * back to the reader page.
  */
-static int rb_is_reader_page(struct buffer_page *page)
+static bool rb_is_reader_page(struct buffer_page *page)
 {
         struct list_head *list = page->list.prev;
 
@@ -2270,7 +2270,7 @@ rb_add_time_stamp(struct ring_buffer_event *event, u64 delta)
         return skip_time_extend(event);
 }
 
-static inline int rb_event_is_commit(struct ring_buffer_per_cpu *cpu_buffer,
+static inline bool rb_event_is_commit(struct ring_buffer_per_cpu *cpu_buffer,
                                      struct ring_buffer_event *event);
 
 /**
@@ -2498,7 +2498,7 @@ static inline void rb_event_discard(struct ring_buffer_event *event)
                 event->time_delta = 1;
 }
 
-static inline int
+static inline bool
 rb_event_is_commit(struct ring_buffer_per_cpu *cpu_buffer,
                    struct ring_buffer_event *event)
 {
@@ -3039,7 +3039,7 @@ int ring_buffer_write(struct ring_buffer *buffer,
 }
 EXPORT_SYMBOL_GPL(ring_buffer_write);
 
-static int rb_per_cpu_empty(struct ring_buffer_per_cpu *cpu_buffer)
+static bool rb_per_cpu_empty(struct ring_buffer_per_cpu *cpu_buffer)
 {
         struct buffer_page *reader = cpu_buffer->reader_page;
         struct buffer_page *head = rb_set_head_page(cpu_buffer);
@@ -3047,7 +3047,7 @@ static int rb_per_cpu_empty(struct ring_buffer_per_cpu *cpu_buffer)
 
         /* In case of error, head will be NULL */
         if (unlikely(!head))
-                return 1;
+                return true;
 
         return reader->read == rb_page_commit(reader) &&
                 (commit == reader ||
@@ -4267,7 +4267,7 @@ EXPORT_SYMBOL_GPL(ring_buffer_reset);
  * rind_buffer_empty - is the ring buffer empty?
  * @buffer: The ring buffer to test
  */
-int ring_buffer_empty(struct ring_buffer *buffer)
+bool ring_buffer_empty(struct ring_buffer *buffer)
 {
         struct ring_buffer_per_cpu *cpu_buffer;
         unsigned long flags;
@@ -4285,10 +4285,10 @@ int ring_buffer_empty(struct ring_buffer *buffer)
                 local_irq_restore(flags);
 
                 if (!ret)
-                        return 0;
+                        return false;
         }
 
-        return 1;
+        return true;
 }
 EXPORT_SYMBOL_GPL(ring_buffer_empty);
 
@@ -4297,7 +4297,7 @@ EXPORT_SYMBOL_GPL(ring_buffer_empty);
  * @buffer: The ring buffer
  * @cpu: The CPU buffer to test
  */
-int ring_buffer_empty_cpu(struct ring_buffer *buffer, int cpu)
+bool ring_buffer_empty_cpu(struct ring_buffer *buffer, int cpu)
 {
         struct ring_buffer_per_cpu *cpu_buffer;
         unsigned long flags;
@@ -4305,7 +4305,7 @@ int ring_buffer_empty_cpu(struct ring_buffer *buffer, int cpu)
         int ret;
 
         if (!cpumask_test_cpu(cpu, buffer->cpumask))
-                return 1;
+                return true;
 
         cpu_buffer = buffer->buffers[cpu];
         local_irq_save(flags);