Re: [PATCH 2/3] perf x86: Add precise sysfs attribute

[Greg KH <gregkh@linuxfoundation.org>]

On Wed, Dec 19, 2012 at 04:07:21PM +0100, Jiri Olsa wrote:
> Adding sysfs precise attribute for cpu device (/sys/devices/cpu)
> to show the maximum value for perf event precise attribute.
> 
> This will be initialy used for automated precise event perf test
> and could be helpful otherwise. Arnaldo suggested to use this as
> a guide for default adding of precise attribute for HW events.
> 
> Signed-off-by: Jiri Olsa <jolsa@redhat.com>
> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
> Cc: Frederic Weisbecker <fweisbec@gmail.com>
> Cc: Ingo Molnar <mingo@elte.hu>
> Cc: Namhyung Kim <namhyung@kernel.org>
> Cc: Paul Mackerras <paulus@samba.org>
> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
> Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
> ---
>  arch/x86/kernel/cpu/perf_event.c | 34 +++++++++++++++++++++++++---------
>  1 file changed, 25 insertions(+), 9 deletions(-)

As you are adding a new sysfs file, you must also document it with an
entry in Documentation/ABI/

thanks,

greg k-h