[tip:perf/urgent] perf config: Allow '_' in config file variable names

[tip-bot for Arnaldo Carvalho de Melo <acme@redhat.com>]

Commit-ID:  8dc7c651dd7d95b548adef8cd56908392d3ba432
Gitweb:     http://git.kernel.org/tip/8dc7c651dd7d95b548adef8cd56908392d3ba432
Author:     Arnaldo Carvalho de Melo <acme@redhat.com>
AuthorDate: Tue, 29 May 2012 21:59:02 -0300
Committer:  Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Tue, 29 May 2012 21:59:02 -0300

perf config: Allow '_' in config file variable names

For annotate I want to be able to have variables that are the same as
the ones representing feature toggles.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-7rhhf6m0a72p2wja4tgv1itg@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/config.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/tools/perf/util/config.c b/tools/perf/util/config.c
index 0deac6a..6faa3a1 100644
--- a/tools/perf/util/config.c
+++ b/tools/perf/util/config.c
@@ -120,7 +120,7 @@ static char *parse_value(void)
 
 static inline int iskeychar(int c)
 {
-	return isalnum(c) || c == '-';
+	return isalnum(c) || c == '-' || c == '_';
 }
 
 static int get_value(config_fn_t fn, void *data, char *name, unsigned int len)