[PATCH v2] powerpc/ftrace: add powerpc timebase as a trace clock source

[Steven Rostedt]

On Fri, 24 Apr 2015 14:24:44 +0530
"Naveen N. Rao" <naveen.n.rao at linux.vnet.ibm.com> wrote:

> Add a new powerpc-specific trace clock using the timebase register,
> similar to x86-tsc. This gives us
> - a fast, monotonic, hardware clock source for trace entries, and
> - a clock that can be used to correlate events across cpus as well as across
>   hypervisor and guests.
> 
> Signed-off-by: Naveen N. Rao <naveen.n.rao at linux.vnet.ibm.com>
> ---
> Changes since v1:
> - removed unnecessary #ifdef in trace_clock.h
> - changed config build dependency for trace_clock.o from TRACE_CLOCK to TRACING
> 

Looks fine to me.

Acked-by: Steven Rostedt <rostedt at goodmis.org>

-- Steve

> 
>  Documentation/trace/ftrace.txt         |  5 +++++
>  arch/powerpc/include/asm/Kbuild        |  1 -
>  arch/powerpc/include/asm/trace_clock.h | 19 +++++++++++++++++++
>  arch/powerpc/kernel/Makefile           |  1 +
>  arch/powerpc/kernel/trace_clock.c      | 15 +++++++++++++++
>  5 files changed, 40 insertions(+), 1 deletion(-)
>  create mode 100644 arch/powerpc/include/asm/trace_clock.h
>  create mode 100644 arch/powerpc/kernel/trace_clock.c
>