perf report/top: Improve toggle callchain menu option
Taking into account the current status of the callchain, i.e. if folded, show "Expand", otherwise "Collapse", also show the name of the entry that will be affected and mention the hotkeys for expanding/collapsing all callchains below the main entry, the one that appears with/without callchains. Reviewed-by: Jiri Olsa <jolsa@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jin Yao <yao.jin@linux.intel.com> Cc: Kan Liang <kan.liang@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lkml.kernel.org/n/tip-03arm6poo8463k5tfcfp7gkk@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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