perf symbols: Simplify symbol machinery setup

And also express its configuration toggles via a struct.

Now all one has to do is to call symbol__init(NULL) if the
defaults are OK, or pass a struct symbol_conf pointer with the
desired configuration.

If a tool uses kernel_maps__find_symbol() to look at the kernel
and modules mappings for a symbol but didn't call symbol__init()
first, that will generate a one time warning too, alerting the
subcommand developer that symbol__init() must be called.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1259071517-3242-2-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 0 insertions, 6 deletions

diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 1332f8ec04aa..271a1600e6f7 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -253,12 +253,6 @@ static int perf_header__adds_write(struct perf_header *self, int fd)
 
 		buildid_sec = &feat_sec[idx++];
 
-		/*
-		 * Read the kernel buildid nad the list of loaded modules with
-		 * its build_ids:
-		 */
-		kernel_maps__init(NULL, false, true);
-
 		/* Write build-ids */
 		buildid_sec->offset = lseek(fd, 0, SEEK_CUR);
 		err = dsos__write_buildid_table(fd);