linux-kernel - [PATCH/RFC 7/9] perf tools: Add symbol_conf.use

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Message-Id: <20170623054827.3828-8-namhyung@kernel.org>
Date:   Fri, 23 Jun 2017 14:48:25 +0900
From:   Namhyung Kim <namhyung@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Jiri Olsa <jolsa@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>, kernel-team@....com,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Andi Kleen <andi@...stfloor.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Wang Nan <wangnan0@...wei.com>
Subject: [PATCH/RFC 7/9] perf tools: Add symbol_conf.use_kcore

The use_kcore field is to control usage of /proc/kcore when loading
symbols.  This patch only introduces the new field and don't change any
behavior by itself.

Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: Wang Nan <wangnan0@...wei.com>
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
 tools/perf/util/symbol.c | 3 ++-
 tools/perf/util/symbol.h | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index fe46eb782297..3f789f33c2ef 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -36,6 +36,7 @@ char **vmlinux_path;
 
 struct symbol_conf symbol_conf = {
 	.use_modules		= true,
+	.use_kcore		= true,
 	.try_vmlinux_path	= true,
 	.annotate_src		= true,
 	.demangle		= true,
@@ -1324,7 +1325,7 @@ int __dso__load_kallsyms(struct dso *dso, const char *filename,
 int dso__load_kallsyms(struct dso *dso, const char *filename,
 		       struct map *map)
 {
-	return __dso__load_kallsyms(dso, filename, map, false);
+	return __dso__load_kallsyms(dso, filename, map, !symbol_conf.use_kcore);
 }
 
 static int dso__load_perf_map(struct dso *dso, struct map *map)
diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index 41ebba9a2eb2..88361eeae813 100644
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -119,7 +119,8 @@ struct symbol_conf {
 			hide_unresolved,
 			raw_trace,
 			report_hierarchy,
-			inline_name;
+			inline_name,
+			use_kcore;
 	const char	*vmlinux_name,
 			*kallsyms_name,
 			*source_prefix,
-- 
2.13.1