From 15273b08dbadbdf43608d9a86e970b9744eeb3c4 Mon Sep 17 00:00:00 2001
From: Dima Zavin <dima@android.com>
Date: Thu, 7 Jul 2011 17:27:59 -0700
Subject: plist: Remove the need to supply locks to plist heads

This was legacy code brought over from the RT tree and
is no longer necessary.

Signed-off-by: Dima Zavin <dima@android.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Daniel Walker <dwalker@codeaurora.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
Link: http://lkml.kernel.org/r/1310084879-10351-2-git-send-email-dima@android.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
 include/linux/plist.h   | 55 +++----------------------------------------------
 include/linux/rtmutex.h |  4 ++--
 2 files changed, 5 insertions(+), 54 deletions(-)

(limited to 'include')

diff --git a/include/linux/plist.h b/include/linux/plist.h
index c9b9f322c8d8..aa0fb390bd29 100644
--- a/include/linux/plist.h
+++ b/include/linux/plist.h
@@ -77,14 +77,9 @@
 
 #include <linux/kernel.h>
 #include <linux/list.h>
-#include <linux/spinlock_types.h>
 
 struct plist_head {
 	struct list_head node_list;
-#ifdef CONFIG_DEBUG_PI_LIST
-	raw_spinlock_t *rawlock;
-	spinlock_t *spinlock;
-#endif
 };
 
 struct plist_node {
@@ -93,37 +88,13 @@ struct plist_node {
 	struct list_head	node_list;
 };
 
-#ifdef CONFIG_DEBUG_PI_LIST
-# define PLIST_HEAD_LOCK_INIT(_lock)		.spinlock = _lock
-# define PLIST_HEAD_LOCK_INIT_RAW(_lock)	.rawlock = _lock
-#else
-# define PLIST_HEAD_LOCK_INIT(_lock)
-# define PLIST_HEAD_LOCK_INIT_RAW(_lock)
-#endif
-
-#define _PLIST_HEAD_INIT(head)				\
-	.node_list = LIST_HEAD_INIT((head).node_list)
-
 /**
  * PLIST_HEAD_INIT - static struct plist_head initializer
  * @head:	struct plist_head variable name
- * @_lock:	lock to initialize for this list
- */
-#define PLIST_HEAD_INIT(head, _lock)			\
-{							\
-	_PLIST_HEAD_INIT(head),				\
-	PLIST_HEAD_LOCK_INIT(&(_lock))			\
-}
-
-/**
- * PLIST_HEAD_INIT_RAW - static struct plist_head initializer
- * @head:	struct plist_head variable name
- * @_lock:	lock to initialize for this list
  */
-#define PLIST_HEAD_INIT_RAW(head, _lock)		\
+#define PLIST_HEAD_INIT(head)				\
 {							\
-	_PLIST_HEAD_INIT(head),				\
-	PLIST_HEAD_LOCK_INIT_RAW(&(_lock))		\
+	.node_list = LIST_HEAD_INIT((head).node_list)	\
 }
 
 /**
@@ -141,31 +112,11 @@ struct plist_node {
 /**
  * plist_head_init - dynamic struct plist_head initializer
  * @head:	&struct plist_head pointer
- * @lock:	spinlock protecting the list (debugging)
  */
 static inline void
-plist_head_init(struct plist_head *head, spinlock_t *lock)
+plist_head_init(struct plist_head *head)
 {
 	INIT_LIST_HEAD(&head->node_list);
-#ifdef CONFIG_DEBUG_PI_LIST
-	head->spinlock = lock;
-	head->rawlock = NULL;
-#endif
-}
-
-/**
- * plist_head_init_raw - dynamic struct plist_head initializer
- * @head:	&struct plist_head pointer
- * @lock:	raw_spinlock protecting the list (debugging)
- */
-static inline void
-plist_head_init_raw(struct plist_head *head, raw_spinlock_t *lock)
-{
-	INIT_LIST_HEAD(&head->node_list);
-#ifdef CONFIG_DEBUG_PI_LIST
-	head->rawlock = lock;
-	head->spinlock = NULL;
-#endif
 }
 
 /**
diff --git a/include/linux/rtmutex.h b/include/linux/rtmutex.h
index 8d522ffeda33..de17134244f3 100644
--- a/include/linux/rtmutex.h
+++ b/include/linux/rtmutex.h
@@ -66,7 +66,7 @@ struct hrtimer_sleeper;
 
 #define __RT_MUTEX_INITIALIZER(mutexname) \
 	{ .wait_lock = __RAW_SPIN_LOCK_UNLOCKED(mutexname.wait_lock) \
-	, .wait_list = PLIST_HEAD_INIT_RAW(mutexname.wait_list, mutexname.wait_lock) \
+	, .wait_list = PLIST_HEAD_INIT(mutexname.wait_list) \
 	, .owner = NULL \
 	__DEBUG_RT_MUTEX_INITIALIZER(mutexname)}
 
@@ -100,7 +100,7 @@ extern void rt_mutex_unlock(struct rt_mutex *lock);
 
 #ifdef CONFIG_RT_MUTEXES
 # define INIT_RT_MUTEXES(tsk)						\
-	.pi_waiters	= PLIST_HEAD_INIT(tsk.pi_waiters, tsk.pi_lock),	\
+	.pi_waiters	= PLIST_HEAD_INIT(tsk.pi_waiters),	\
 	INIT_RT_MUTEX_DEBUG(tsk)
 #else
 # define INIT_RT_MUTEXES(tsk)
-- 
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