Three minor tracing fixes:

- Fix missing prototypes in sample module for direct functions

- Fix check of valid buffer in get_trace_buf()

- Fix annotations of percpu pointers.

Jiri Olsa (1):
      ftrace/samples: Add missing prototypes direct functions

Naveen N. Rao (2):
      tracing: Fix check for trace_percpu_buffer validity in get_trace_buf()
      tracing: Tag trace_percpu_buffer as a percpu pointer

----
 kernel/trace/trace.c                        | 6 +++---
 samples/ftrace/ftrace-direct-modify.c       | 3 +++
 samples/ftrace/ftrace-direct-multi-modify.c | 3 +++
 samples/ftrace/ftrace-direct-too.c          | 3 +++
 samples/ftrace/ftrace-direct.c              | 2 ++
 5 files changed, 14 insertions(+), 3 deletions(-)