linux-kernel - [tip:core/locking] lockdep: Fix missing entry in /proc/lock

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Message-ID: <tip-212274347fc4d2a7c56bf6c953b02c809e7e0be1@git.kernel.org>
Date:	Mon, 17 Aug 2009 08:01:39 GMT
From:	tip-bot for Li Zefan <lizf@...fujitsu.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	lizf@...fujitsu.com, peterz@...radead.org, tglx@...utronix.de,
	mingo@...e.hu
Subject: [tip:core/locking] lockdep: Fix missing entry in /proc/lock_stat

Commit-ID:  212274347fc4d2a7c56bf6c953b02c809e7e0be1
Gitweb:     http://git.kernel.org/tip/212274347fc4d2a7c56bf6c953b02c809e7e0be1
Author:     Li Zefan <lizf@...fujitsu.com>
AuthorDate: Mon, 17 Aug 2009 13:39:33 +0800
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Mon, 17 Aug 2009 09:54:39 +0200

lockdep: Fix missing entry in /proc/lock_stat

One entry is missing in the output of /proc/lock_stat.

The cause is, when ls_start() is called the 2nd time, we should
start from stats[@pos-1] but not stats[@pos], because pos == 0
is the header.

Signed-off-by: Li Zefan <lizf@...fujitsu.com>
Cc: Peter Zijlstra <peterz@...radead.org>
LKML-Reference: <4A88ED15.20800@...fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@...e.hu>


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

diff --git a/kernel/lockdep_proc.c b/kernel/lockdep_proc.c
index fba81f1..5dbe30b 100644
--- a/kernel/lockdep_proc.c
+++ b/kernel/lockdep_proc.c
@@ -634,7 +634,7 @@ static void *ls_start(struct seq_file *m, loff_t *pos)
 	if (*pos == 0)
 		return SEQ_START_TOKEN;
 
-	data->iter = data->stats + *pos;
+	data->iter = data->stats + (*pos - 1);
 	if (data->iter >= data->iter_end)
 		data->iter = NULL;
 
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