Subject: linux-next: build warnings from perf build in Linus' tree

From: Stephen Rothwell <[email-masked]>
Date: Thu, 27 Aug 2020 08:38:39 +1000

Hi all,

Doing the perf native (PowerPC le) build today produces these warnings:

util/dsos.c: In function 'dsos__findnew_id':
util/dsos.c:39:14: note: the layout of aggregates containing vectors with 8-byte alignment has changed in GCC 5
   39 |  dso->id.maj = id->maj;
      |  ~~~~~~~~~~~~^~~~~~~~~
util/namespaces.c: In function 'nsinfo__new':
util/namespaces.c:139:12: note: the layout of aggregates containing vectors with 8-byte alignment has changed in GCC 5
  139 |   nsi->pid = pid;
      |   ~~~~~~~~~^~~~~
util/evlist.c: In function 'perf_evlist__set_id_pos':
util/evlist.c:116:17: note: the layout of aggregates containing vectors with 8-byte alignment has changed in GCC 5
  116 |  evlist->id_pos = first->id_pos;
      |  ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~
util/annotate.c: In function 'annotation__init_column_widths':
util/annotate.c:2701:44: note: the layout of aggregates containing vectors with 2-byte alignment has changed in GCC 5
 2701 |  notes->widths.addr = notes->widths.target =
      |                       ~~~~~~~~~~~~~~~~~~~~~^
 2702 |   notes->widths.min_addr = hex_width(symbol__size(sym));
      |   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
util/session.c: In function 'perf_event__read_swap':
util/session.c:620:20: note: the layout of aggregates containing vectors with 8-byte alignment has changed in GCC 5
  620 |  event->read.pid   = bswap_32(event->read.pid);
      |                    ^
util/jitdump.c: In function 'jit_process':
util/jitdump.c:329:23: note: the layout of aggregates containing vectors with 8-byte alignment has changed in GCC 5
  329 |    jr->load.pid       = bswap_32(jr->load.pid);
      |                       ^
util/auxtrace.c: In function 'auxtrace_queues__add_buffer.part.0':
util/auxtrace.c:360:12: note: the layout of aggregates containing vectors with 8-byte alignment has changed in GCC 5
  360 | static int auxtrace_queues__add_buffer(struct auxtrace_queues *queues,
      |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~
util/synthetic-events.c: In function 'perf_event__synthesize_sample':
util/synthetic-events.c:1441:22: note: the layout of aggregates containing vectors with 8-byte alignment has changed in GCC 5
 1441 |   u.val32[0] = sample->pid;
      |                ~~~~~~^~~~~
util/probe-finder.c: In function 'line_range_search_cb':
util/probe-finder.c:1887:17: note: the layout of aggregates containing vectors with 8-byte alignment has changed in GCC 5
 1887 |   lr->start = lf->lno_s;
      |               ~~^~~~~~~
util/machine.c: In function 'machine__process_mmap2_event':
util/machine.c:1716:5: note: the layout of aggregates containing vectors with 8-byte alignment has changed in GCC 5
 1716 | int machine__process_mmap2_event(struct machine *machine,
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
util/intel-pt-decoder/intel-pt-decoder.c: In function 'intel_pt_get_next_packet':
util/intel-pt-decoder/intel-pt-decoder.c:916:21: note: the layout of aggregates containing vectors with 8-byte alignment has changed in GCC 5
  916 |   decoder->pkt_step = ret;
      |   ~~~~~~~~~~~~~~~~~~^~~~~
util/pmu.c: In function '__perf_pmu__new_alias':
util/pmu.c:308:12: note: the layout of aggregates containing vectors with 2-byte alignment has changed in GCC 5
  308 | static int __perf_pmu__new_alias(struct list_head *list, char *dir, char *name,
      |            ^~~~~~~~~~~~~~~~~~~~~
util/intel-pt.c: In function 'intel_pt_synth_pebs_sample':
util/intel-pt.c:1284:14: note: the layout of aggregates containing vectors with 8-byte alignment has changed in GCC 5
 1284 |  sample->pid = ptq->pid;
      |  ~~~~~~~~~~~~^~~~~~~~~~
util/parse-events.c: In function 'parse_events__modifier_event':
util/parse-events.c:1885:5: note: the layout of aggregates containing vectors with 8-byte alignment has changed in GCC 5
 1885 | int parse_events__modifier_event(struct list_head *list, char *str, bool add)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/sfr/next/next/tools/perf/util/namespaces.c: In function 'nsinfo__new':
/home/sfr/next/next/tools/perf/util/namespaces.c:139:12: note: the layout of aggregates containing vectors with 8-byte alignment has changed in GCC 5
  139 |   nsi->pid = pid;
      |   ~~~~~~~~~^~~~~

I assume they are because I have changed all my toolcahins to gcc
v10 today.

-- 
Cheers,
Stephen Rothwell