linux-kernel - [PATCH 1/6] perf buildid-list: No need to process the header sections again

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Message-Id: <1262901583-8074-1-git-send-email-acme@infradead.org>
Date:	Thu,  7 Jan 2010 19:59:38 -0200
From:	Arnaldo Carvalho de Melo <acme@...radead.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	linux-kernel@...r.kernel.org,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Frédéric Weisbecker <fweisbec@...il.com>,
	Mike Galbraith <efault@....de>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>
Subject: [PATCH 1/6] perf buildid-list: No need to process the header sections again

From: Arnaldo Carvalho de Melo <acme@...hat.com>

As it is already processed by:

	perf_session__new
		perf_session__open
			perf_session__read

This was harmless, because we use dsos__findnew, that would already find
it, but is unnecessary work and removing it makes builtin-buildid-list.c
even shorter.

Cc: Frédéric Weisbecker <fweisbec@...il.com>
Cc: Mike Galbraith <efault@....de>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Paul Mackerras <paulus@...ba.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/builtin-buildid-list.c |   25 +------------------------
 1 files changed, 1 insertions(+), 24 deletions(-)

diff --git a/tools/perf/builtin-buildid-list.c b/tools/perf/builtin-buildid-list.c
index 1e99ac8..4229c2c 100644
--- a/tools/perf/builtin-buildid-list.c
+++ b/tools/perf/builtin-buildid-list.c
@@ -31,26 +31,6 @@ static const struct option options[] = {
 	OPT_END()
 };
 
-static int perf_file_section__process_buildids(struct perf_file_section *self,
-					       int feat, int fd)
-{
-	if (feat != HEADER_BUILD_ID)
-		return 0;
-
-	if (lseek(fd, self->offset, SEEK_SET) < 0) {
-		pr_warning("Failed to lseek to %Ld offset for buildids!\n",
-			   self->offset);
-		return -1;
-	}
-
-	if (perf_header__read_build_ids(fd, self->offset, self->size)) {
-		pr_warning("Failed to read buildids!\n");
-		return -1;
-	}
-
-	return 0;
-}
-
 static int __cmd_buildid_list(void)
 {
 	int err = -1;
@@ -60,10 +40,7 @@ static int __cmd_buildid_list(void)
 	if (session == NULL)
 		return -1;
 
-	err = perf_header__process_sections(&session->header, session->fd,
-				         perf_file_section__process_buildids);
-	if (err >= 0)
-		dsos__fprintf_buildid(stdout);
+	dsos__fprintf_buildid(stdout);
 
 	perf_session__delete(session);
 	return err;
-- 
1.6.2.5

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