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[ Upstream commit68566a7cf5] Synthesized MMAP events have zero ino_generation, so do not compare them to DSOs with a real ino_generation otherwise we end up with a DSO without a build id. Fixes:0e3149f86b("perf dso: Move dso_id from 'struct map' to 'struct dso'") Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: kvm@vger.kernel.org Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lore.kernel.org/r/20220711093218.10967-2-adrian.hunter@intel.com [ Added clarification to the comment from Ian + more detailed explanation from Adrian ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Sasha Levin <sashal@kernel.org>