[PATCH 4.19 08/14] Revert "perf cs-etm: Move definition of traceid_list global variable from header file"

[Greg Kroah-Hartman]

From: Salvatore Bonaccorso <carnil@xxxxxxxxxx>

This reverts commit 168200b6d6ea0cb5765943ec5da5b8149701f36a upstream.
(but only from 4.19.y)

The original commit introduces a build failure as seen on Debian buster
when compiled with gcc (Debian 8.3.0-6) 8.3.0:

  $ LC_ALL=C.UTF-8 ARCH=x86 make perf
  [...]
  Warning: Kernel ABI header at 'tools/include/uapi/linux/bpf.h' differs from latest version at 'include/uapi/linux/bpf.h'
    CC       util/cs-etm-decoder/cs-etm-decoder.o
    CC       util/intel-pt.o
  util/cs-etm-decoder/cs-etm-decoder.c: In function 'cs_etm_decoder__buffer_packet':
  util/cs-etm-decoder/cs-etm-decoder.c:287:24: error: 'traceid_list' undeclared (first use in this function); did you mean 'trace_event'?
    inode = intlist__find(traceid_list, trace_chan_id);
                          ^~~~~~~~~~~~
                          trace_event
  util/cs-etm-decoder/cs-etm-decoder.c:287:24: note: each undeclared identifier is reported only once for each function it appears in
  make[6]: *** [/build/linux-stable/tools/build/Makefile.build:97: util/cs-etm-decoder/cs-etm-decoder.o] Error 1
  make[5]: *** [/build/linux-stable/tools/build/Makefile.build:139: cs-etm-decoder] Error 2
  make[5]: *** Waiting for unfinished jobs....
  make[4]: *** [/build/linux-stable/tools/build/Makefile.build:139: util] Error 2
  make[3]: *** [Makefile.perf:633: libperf-in.o] Error 2
  make[2]: *** [Makefile.perf:206: sub-make] Error 2
  make[1]: *** [Makefile:70: all] Error 2
  make: *** [Makefile:77: perf] Error 2

Link: https://lore.kernel.org/stable/20201114083501.GA468764@xxxxxxxxxxx/
Cc: Leo Yan <leo.yan@xxxxxxxxxx>
Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Suzuki Poulouse <suzuki.poulose@xxxxxxx>
Cc: Tor Jeremiassen <tor@xxxxxx>
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: Guenter Roeck <linux@xxxxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> # 4.19.y
Signed-off-by: Salvatore Bonaccorso <carnil@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 tools/perf/util/cs-etm.c |    3 ---
 tools/perf/util/cs-etm.h |    3 +++
 2 files changed, 3 insertions(+), 3 deletions(-)

--- a/tools/perf/util/cs-etm.c
+++ b/tools/perf/util/cs-etm.c
@@ -87,9 +87,6 @@ struct cs_etm_queue {
 	struct cs_etm_packet *packet;
 };
 
-/* RB tree for quick conversion between traceID and metadata pointers */
-static struct intlist *traceid_list;
-
 static int cs_etm__update_queues(struct cs_etm_auxtrace *etm);
 static int cs_etm__process_timeless_queues(struct cs_etm_auxtrace *etm,
 					   pid_t tid, u64 time_);
--- a/tools/perf/util/cs-etm.h
+++ b/tools/perf/util/cs-etm.h
@@ -53,6 +53,9 @@ enum {
 	CS_ETMV4_PRIV_MAX,
 };
 
+/* RB tree for quick conversion between traceID and CPUs */
+struct intlist *traceid_list;
+
 #define KiB(x) ((x) * 1024)
 #define MiB(x) ((x) * 1024 * 1024)