perf timechart: Introduce tool struct
To avoid having all those global variables and to use the interface to event processing that is based on passing a 'perf_tool' struct that should be embedded in a per tool specific struct passed to all the sample processing callbacks. There are some more globals to move, next patches will do it. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stanislav Fomichev <stfomichev@yandex-team.ru> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-0iah65pq796ezbk5u1lzwy1k@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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