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>

2 files changed, 5 insertions, 54 deletions

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)