perf machine: Introduce machine__find_kernel_symbol_by_name()

To be used in the 'vmlinux matches kallsyms' 'perf test'  entry.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-m56g1853lz2c6nhnqxibq4jd@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/machine.h

@@ -179,6 +179,16 @@ struct symbol *machine__find_kernel_symbol(struct machine *machine,
 				       mapp, filter);
 }
 
+static inline
+struct symbol *machine__find_kernel_symbol_by_name(struct machine *machine,
+						   enum map_type type, const char *name,
+						   struct map **mapp,
+						   symbol_filter_t filter)
+{
+	return map_groups__find_symbol_by_name(&machine->kmaps, type, name,
+					       mapp, filter);
+}
+
 static inline
 struct symbol *machine__find_kernel_function(struct machine *machine, u64 addr,
 					     struct map **mapp,