perf symbols: Bit pack to save a byte

Use a bit field alongside the earlier bit fields.
Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Martin Liška <mliska@suse.cz>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: https://lore.kernel.org/r/20211112035124.94327-2-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/annotate.c

@@ -3132,7 +3132,7 @@ int symbol__annotate2(struct map_symbol *ms, struct evsel *evsel,
 	notes->nr_events = nr_pcnt;
 
 	annotation__update_column_widths(notes);
-	sym->annotate2 = true;
+	sym->annotate2 = 1;
 
 	return 0;
 

tools/perf/util/symbol.h

@@ -62,10 +62,10 @@ struct symbol {
 	u8		ignore:1;
 	/** Symbol for an inlined function. */
 	u8		inlined:1;
+	/** Has symbol__annotate2 been performed. */
+	u8		annotate2:1;
 	/** Architecture specific. Unused except on PPC where it holds st_other. */
 	u8		arch_sym;
-	/** Has symbol__annotate2 been performed. */
-	bool		annotate2;
 	/** The name of length namelen associated with the symbol. */
 	char		name[];
 };