perf top: Use machine->kptr_restrict_warned
Its now there, no need to have it too. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Milian Wolff <milian.wolff@kdab.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-y18oeou494uy11im7u9to0dx@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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