linux-kernel - [tip:tracing/urgent] kmemtrace: Fix up tracer registration

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Message-ID: <tip-f9ac5a69edee0ee7e06a05727226e3f275306c8d@git.kernel.org>
Date:	Thu, 1 Oct 2009 09:59:41 GMT
From:	tip-bot for Paul Mundt <lethal@...ux-sh.org>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	lizf@...fujitsu.com, penberg@...helsinki.fi,
	eduard.munteanu@...ux360.ro, lethal@...ux-sh.org,
	fweisbec@...il.com, rostedt@...dmis.org, tglx@...utronix.de,
	mingo@...e.hu
Subject: [tip:tracing/urgent] kmemtrace: Fix up tracer registration

Commit-ID:  f9ac5a69edee0ee7e06a05727226e3f275306c8d
Gitweb:     http://git.kernel.org/tip/f9ac5a69edee0ee7e06a05727226e3f275306c8d
Author:     Paul Mundt <lethal@...ux-sh.org>
AuthorDate: Mon, 28 Sep 2009 16:55:40 +0900
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Thu, 1 Oct 2009 11:53:44 +0200

kmemtrace: Fix up tracer registration

Commit ddc1637af217dbd8bc51f30e6d24e84476a869a6 ("kmemtrace: Print
binary output only if 'bin' option is set") ended up inverting the
error detection logic. register_tracer() returns 0 on success,
which this change caused to treat as an error, resulting in:

[    0.132000] Warning: could not register the kmem tracer

as well as bailing out of the initcall with an error value. This
restores the old logic.

Signed-off-by: Paul Mundt <lethal@...ux-sh.org>
Acked-by: Pekka Enberg <penberg@...helsinki.fi>
Acked-by: Frederic Weisbecker <fweisbec@...il.com>
Cc: Eduard - Gabriel Munteanu <eduard.munteanu@...ux360.ro>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Li Zefan <lizf@...fujitsu.com>
LKML-Reference: <20090928075540.GD6668@...ux-sh.org>
Signed-off-by: Ingo Molnar <mingo@...e.hu>


---
 kernel/trace/kmemtrace.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/kernel/trace/kmemtrace.c b/kernel/trace/kmemtrace.c
index 81b1645..a91da69 100644
--- a/kernel/trace/kmemtrace.c
+++ b/kernel/trace/kmemtrace.c
@@ -501,7 +501,7 @@ static int __init init_kmem_tracer(void)
 		return 1;
 	}
 
-	if (!register_tracer(&kmem_tracer)) {
+	if (register_tracer(&kmem_tracer) != 0) {
 		pr_warning("Warning: could not register the kmem tracer\n");
 		return 1;
 	}
--
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