[PATCH 4.19.y only 0/2] Fix perf build failures

[Salvatore Bonaccorso <carnil@debian.org>]

Hi Greg, Sasha and all,

This is a resubmit of the patches already done in 
https://lore.kernel.org/stable/20201125201215.26455-1-carnil@debian.org/
and
https://lore.kernel.org/stable/20201125201215.26455-2-carnil@debian.org/

The issue can be explained as this. In

https://lore.kernel.org/stable/20201014135627.GA3698844@kroah.com/

on request 168200b6d6ea ("perf cs-etm: Move definition of 'traceid_list' global
variable from header file") was queued back to 4.19.y to fix build failures for
perf with more recent GCCs.

But for 4.19.y this was wrong because it missed to pick as well a dependency
needed, and in turn it caused build failures with older GCC (8.3.0 as used in
Debian stable in that case).

The commit was reverted in a later in 4.19.159.

It as though requested to try to allow as well compilation with more recent
GCCs (while obviously not breaking older GCC builds) and found that the cause
was just the missing dependency to pick up, namely pick 95c6fe970a01 ("perf
cs-etm: Change tuple from traceID-CPU# to traceID-metadata") before
168200b6d6ea ("perf cs-etm: Move definition of 'traceid_list' global variable
from header file").

Regards,
Salvatore

Leo Yan (2):
  perf cs-etm: Change tuple from traceID-CPU# to traceID-metadata
  perf cs-etm: Move definition of 'traceid_list' global variable from
    header file

 .../perf/util/cs-etm-decoder/cs-etm-decoder.c |  8 ++---
 tools/perf/util/cs-etm.c                      | 29 +++++++++++++++----
 tools/perf/util/cs-etm.h                      | 10 +++++--
 3 files changed, 33 insertions(+), 14 deletions(-)

-- 
2.30.0.rc2