perf evlist: Add evlist__for_each_entry_from() macro

This patch adds a new iteration macro for evlist that resumes iteration
from a given evsel in the evlist.

This macro will be used in the workqueue series.

Signed-off-by: Riccardo Mancini <rickyman7@gmail.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/2386505f8b598adf0dbcd04ec21804c6bcf00826.1629490974.git.rickyman7@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
index 5c22383..97bfb8d 100644 (file)
--- a/tools/perf/util/evlist.h
+++ b/tools/perf/util/evlist.h
@@ -275,6 +275,22 @@ void evlist__to_front(struct evlist *evlist, struct evsel *move_evsel);
 #define evlist__for_each_entry_continue(evlist, evsel) \
        __evlist__for_each_entry_continue(&(evlist)->core.entries, evsel)
 
+/**
+ * __evlist__for_each_entry_from - continue iteration from @evsel (included)
+ * @list: list_head instance to iterate
+ * @evsel: struct evsel iterator
+ */
+#define __evlist__for_each_entry_from(list, evsel) \
+       list_for_each_entry_from(evsel, list, core.node)
+
+/**
+ * evlist__for_each_entry_from - continue iteration from @evsel (included)
+ * @evlist: evlist instance to iterate
+ * @evsel: struct evsel iterator
+ */
+#define evlist__for_each_entry_from(evlist, evsel) \
+       __evlist__for_each_entry_from(&(evlist)->core.entries, evsel)
+
 /**
  * __evlist__for_each_entry_reverse - iterate thru all the evsels in reverse order
  * @list: list_head instance to iterate