linux-kernel - [PATCH RFC 10/11] Adopt kernel/sched.c to lock monitor

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Message-Id: <1268563128-6486-11-git-send-email-mitake@dcl.info.waseda.ac.jp>
Date:	Sun, 14 Mar 2010 19:38:47 +0900
From:	Hitoshi Mitake <mitake@....info.waseda.ac.jp>
To:	fweisbec@...il.com
Cc:	linux-kernel@...r.kernel.org, mitake@....info.waseda.ac.jp,
	h.mitake@...il.com, Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Jens Axboe <jens.axboe@...cle.com>,
	Jason Baron <jbaron@...hat.com>
Subject: [PATCH RFC 10/11] Adopt kernel/sched.c to lock monitor

There are some points of directly calling the macros spin_{acquire, release}()
and the function lock_set_subclass() in kernel/sched.c.

Now spinlock_t doesn't have struct lockdep_map,
so this patch fixes them with the rule of lock monitor.

Signed-off-by: Hitoshi Mitake <mitake@....info.waseda.ac.jp>
Cc: Ingo Molnar <mingo@...e.hu>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: Jens Axboe <jens.axboe@...cle.com>
Cc: Jason Baron <jbaron@...hat.com>
---
 kernel/sched.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/kernel/sched.c b/kernel/sched.c
index 7266b91..6c8a52e 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -891,7 +891,7 @@ static inline void finish_lock_switch(struct rq *rq, struct task_struct *prev)
 	 * fix up the runqueue lock - which gets 'carried over' from
 	 * prev into current:
 	 */
-	spin_acquire(&rq->lock.dep_map, 0, 0, _THIS_IP_);
+	spin_acquire(&rq->lock.monitor, 0, 0, _THIS_IP_);
 
 	raw_spin_unlock_irq(&rq->lock);
 }
@@ -1803,7 +1803,7 @@ static inline void double_unlock_balance(struct rq *this_rq, struct rq *busiest)
 	__releases(busiest->lock)
 {
 	raw_spin_unlock(&busiest->lock);
-	lock_set_subclass(&this_rq->lock.dep_map, 0, _RET_IP_);
+	lock_set_subclass(&this_rq->lock.monitor.dep_map, 0, _RET_IP_);
 }
 #endif
 
@@ -2905,7 +2905,7 @@ context_switch(struct rq *rq, struct task_struct *prev,
 	 * do an early lockdep release here:
 	 */
 #ifndef __ARCH_WANT_UNLOCKED_CTXSW
-	spin_release(&rq->lock.dep_map, 1, _THIS_IP_);
+	spin_release(&rq->lock.monitor, 1, _THIS_IP_);
 #endif
 
 	/* Here we just switch the register state and the stack. */
@@ -6725,7 +6725,7 @@ SYSCALL_DEFINE0(sched_yield)
 	 * no need to preempt or enable interrupts:
 	 */
 	__release(rq->lock);
-	spin_release(&rq->lock.dep_map, 1, _THIS_IP_);
+	spin_release(&rq->lock.monitor, 1, _THIS_IP_);
 	do_raw_spin_unlock(&rq->lock);
 	preempt_enable_no_resched();
 
-- 
1.6.5.2

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