[PATCH 4/5] arm: enable support for software perf events

[Russell King - ARM Linux]

On Thu, Jan 14, 2010 at 12:14:15PM +0000, Jamie Iles wrote:
> The perf events subsystem allows counting of both hardware and
> software events. This patch implements the bare minimum for software
> performance events.
> 
> Signed-off-by: Jamie Iles <jamie.iles at picochip.com>
> Cc: Peter Zijlstra <peterz at infradead.org>
> Cc: Ingo Molnar <mingo at elte.hu>
> ---
>  arch/arm/Kconfig                  |    2 ++
>  arch/arm/include/asm/perf_event.h |   31 +++++++++++++++++++++++++++++++
>  arch/arm/mm/fault.c               |    7 +++++++
>  3 files changed, 40 insertions(+), 0 deletions(-)
>  create mode 100644 arch/arm/include/asm/perf_event.h
> 
> diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
> index 293a879..72646b2 100644
> --- a/arch/arm/Kconfig
> +++ b/arch/arm/Kconfig
> @@ -21,6 +21,8 @@ config ARM
>  	select HAVE_KERNEL_GZIP
>  	select HAVE_KERNEL_LZO
>  	select GENERIC_ATOMIC64

This conflicts - this select is only if !CPU_32v6K in my kernel.

What's the implication?  Does this perf stuff require these atomic64
stuff (in which case, those symbols should only be selected if
GENERIC_ATOMIC64 is also selected.)

Please sort this out.