[tip:perf/core] perf util: Take elf_name as const string in dso__demangle_sym

[tip-bot for Milian Wolff]

Commit-ID:  80c345b255cbb4e9dfb193bf0bf5536217237f6a
Gitweb:     http://git.kernel.org/tip/80c345b255cbb4e9dfb193bf0bf5536217237f6a
Author:     Milian Wolff <milian.wolff@xxxxxxxx>
AuthorDate: Sun, 6 Aug 2017 23:24:34 +0200
Committer:  Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Fri, 11 Aug 2017 16:06:31 -0300

perf util: Take elf_name as const string in dso__demangle_sym

The input string is not modified and thus can be passed in as a pointer
to const data.

Signed-off-by: Milian Wolff <milian.wolff@xxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Yao Jin <yao.jin@xxxxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/20170806212446.24925-3-milian.wolff@xxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/util/symbol-elf.c     | 2 +-
 tools/perf/util/symbol-minimal.c | 2 +-
 tools/perf/util/symbol.h         | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c
index 502505c..7cf18f1 100644
--- a/tools/perf/util/symbol-elf.c
+++ b/tools/perf/util/symbol-elf.c
@@ -391,7 +391,7 @@ out_elf_end:
 	return 0;
 }
 
-char *dso__demangle_sym(struct dso *dso, int kmodule, char *elf_name)
+char *dso__demangle_sym(struct dso *dso, int kmodule, const char *elf_name)
 {
 	return demangle_sym(dso, kmodule, elf_name);
 }
diff --git a/tools/perf/util/symbol-minimal.c b/tools/perf/util/symbol-minimal.c
index 40bf5d4..1a5aa35 100644
--- a/tools/perf/util/symbol-minimal.c
+++ b/tools/perf/util/symbol-minimal.c
@@ -377,7 +377,7 @@ void symbol__elf_init(void)
 
 char *dso__demangle_sym(struct dso *dso __maybe_unused,
 			int kmodule __maybe_unused,
-			char *elf_name __maybe_unused)
+			const char *elf_name __maybe_unused)
 {
 	return NULL;
 }
diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index 41ebba9..f0b0881 100644
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -306,7 +306,7 @@ int dso__load_sym(struct dso *dso, struct map *map, struct symsrc *syms_ss,
 int dso__synthesize_plt_symbols(struct dso *dso, struct symsrc *ss,
 				struct map *map);
 
-char *dso__demangle_sym(struct dso *dso, int kmodule, char *elf_name);
+char *dso__demangle_sym(struct dso *dso, int kmodule, const char *elf_name);
 
 void __symbols__insert(struct rb_root *symbols, struct symbol *sym, bool kernel);
 void symbols__insert(struct rb_root *symbols, struct symbol *sym);