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Auxtrace support may need DSOs for decoding (for example Arm Coresight).
If one of these is missing it would make sense to warn once for each one
that's missing, but not flood the output with every address as there
could be thousands of lookups.

This flag will allow tracking whether a warning was shown for each DSO.
Signed-off-by: James Clark <james.clark@arm.com>
Reviewed-by: Leo Yan <leo.yan@linaro.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lore.kernel.org/lkml/20210729155805.2830-5-james.clark@arm.com

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>