linux-kernel - [tip:core/locking] lockdep: Change mark_held_locks() to check hlock->check instead of lockdep_no

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Message-ID: <tip-34d0ed5ea7a72d5961552fb1758a94f0d3f8f3dc@git.kernel.org>
Date:	Mon, 10 Feb 2014 05:33:20 -0800
From:	tip-bot for Oleg Nesterov <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, sasha.levin@...cle.com,
	hpa@...or.com, mingo@...nel.org, stern@...land.harvard.edu,
	torvalds@...ux-foundation.org, peterz@...radead.org,
	davej@...hat.com, gregkh@...uxfoundation.org,
	paulmck@...ux.vnet.ibm.com, rostedt@...dmis.org,
	tglx@...utronix.de, oleg@...hat.com
Subject: [tip:core/locking] lockdep: Change mark_held_locks()
  to check hlock->check instead of lockdep_no_validate

Commit-ID:  34d0ed5ea7a72d5961552fb1758a94f0d3f8f3dc
Gitweb:     http://git.kernel.org/tip/34d0ed5ea7a72d5961552fb1758a94f0d3f8f3dc
Author:     Oleg Nesterov <oleg@...hat.com>
AuthorDate: Mon, 20 Jan 2014 19:20:13 +0100
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Sun, 9 Feb 2014 21:18:59 +0100

lockdep: Change mark_held_locks() to check hlock->check instead of lockdep_no_validate

The __lockdep_no_validate check in mark_held_locks() adds the subtle
and (afaics) unnecessary difference between no-validate and check==0.
And this looks even more inconsistent because __lock_acquire() skips
mark_irqflags()->mark_lock() if !check.

Change mark_held_locks() to check hlock->check instead.

Signed-off-by: Oleg Nesterov <oleg@...hat.com>
Cc: Dave Jones <davej@...hat.com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Paul McKenney <paulmck@...ux.vnet.ibm.com>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Alan Stern <stern@...land.harvard.edu>
Cc: Sasha Levin <sasha.levin@...cle.com>
Signed-off-by: Peter Zijlstra <peterz@...radead.org>
Link: http://lkml.kernel.org/r/20140120182013.GA26505@redhat.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 kernel/locking/lockdep.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
index f7eba92..bf0c6b0 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
@@ -2517,7 +2517,7 @@ mark_held_locks(struct task_struct *curr, enum mark_type mark)
 
 		BUG_ON(usage_bit >= LOCK_USAGE_STATES);
 
-		if (hlock_class(hlock)->key == __lockdep_no_validate__.subkeys)
+		if (!hlock->check)
 			continue;
 
 		if (!mark_lock(curr, hlock, usage_bit))
--
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