perf hists browser: Check sort keys before hot key actions
The context menu in TUI hists browser checks corresponding sort keys when creating the menu item. But hotkey actions lacks these checks so it can filter using incorrect info. For example, default sort key of 'perf top' doesn't contain 'comm' or 'pid' sort key so each hist entry's thread info is not reliable. Thus it should prohibit using thread filter on 't' key. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1457533253-21419-3-git-send-email-namhyung@kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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