[PATCH 1/2] perf/arm-cmn: Fix PMU instance naming

[Will Deacon]

On Thu, Jan 28, 2021 at 01:12:43PM +0000, Robin Murphy wrote:
> Although it's neat to avoid the suffix for the typical case of a
> single PMU, it means systems with multiple CMN instances end up with
> inconsistent naming. I think it also breaks perf tool's "uncore alias"
> logic if the common instance prefix is also the full name of one.
> 
> Avoid any surprises by not trying to be clever and simply numbering
> every instance, even when it might technically prove redundant.
> 
> Fixes: 0ba64770a2f2 ("perf: Add Arm CMN-600 PMU driver")
> Signed-off-by: Robin Murphy <robin.murphy at arm.com>
> ---
>  Documentation/admin-guide/perf/arm-cmn.rst |  2 +-
>  drivers/perf/arm-cmn.c                     | 13 ++++---------
>  2 files changed, 5 insertions(+), 10 deletions(-)

Hmm, so usually I'd push-back on changes like this because it's a
user-visible change, however in this case we're talking about a pretty
niche PMU and a relatively new driver so I think we should proceed. However,
if anybody complains then we'll need to support them in one way or another.

Will