Re: [PATCH 04/10] ARM: ftrace: allow building without frame pointers

Steven Rostedt
2010-02-23T13:49:22Z

On Sun, 2010-02-14 at 01:18 +0530, Rabin Vincent wrote:
> With a new enough GCC, ARM function tracing can be supported without the
> need for frame pointers. This is essential for Thumb-2 support, since
> frame pointers aren't available then.
>
> Signed-off-by: Rabin Vincent <rabin@rab.in>

>
> diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
> index 6c22d8a..7468ffe 100644
> --- a/kernel/trace/Kconfig
> +++ b/kernel/trace/Kconfig
> @@ -126,7 +126,7 @@ if FTRACE
> config FUNCTION_TRACER
> bool "Kernel Function Tracer"
> depends on HAVE_FUNCTION_TRACER
> - select FRAME_POINTER
> + select FRAME_POINTER if (!ARM_UNWIND)
> select KALLSYMS
> select GENERIC_TRACER
> select CONTEXT_SWITCH_TRACER

Ah, evolution is keeping these patches out of order, so I did not see
this change before commenting about the change to the Makefile.

A better comment is needed in the Makefile.

-- Steve