perf kmem: Allow -v option

Current perf kmem fails when -v option is used.  As it's very useful for
debugging, let's allow it.
Signed-off-by: NNamhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Joonsoo Kim <js1304@gmail.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1426145571-3065-3-git-send-email-namhyung@kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/Documentation/perf-kmem.txt

@@ -25,6 +25,10 @@ OPTIONS
 --input=<file>::
 	Select the input file (default: perf.data unless stdin is a fifo)
 
+-v::
+--verbose::
+        Be more verbose. (show symbol address, etc)
+
 --caller::
 	Show per-callsite statistics
 

tools/perf/builtin-kmem.c

@@ -663,6 +663,8 @@ int cmd_kmem(int argc, const char **argv, const char *prefix __maybe_unused)
 	const char * const default_sort_order = "frag,hit,bytes";
 	const struct option kmem_options[] = {
 	OPT_STRING('i', "input", &input_name, "file", "input file name"),
+	OPT_INCR('v', "verbose", &verbose,
+		    "be more verbose (show symbol address, etc)"),
 	OPT_CALLBACK_NOOPT(0, "caller", NULL, NULL,
 			   "show per-callsite statistics", parse_caller_opt),
 	OPT_CALLBACK_NOOPT(0, "alloc", NULL, NULL,