Merge branch 'akpm' (Andrew's patch-bomb)

[linux-flexiantxendom0-3.2.10.git] / kernel / mutex.c

diff --git a/kernel/mutex.c b/kernel/mutex.c
index 2c938e2..a307cc9 100644 (file)
--- a/kernel/mutex.c
+++ b/kernel/mutex.c
@@ -19,7 +19,7 @@
  */
 #include <linux/mutex.h>
 #include <linux/sched.h>
-#include <linux/module.h>
+#include <linux/export.h>
 #include <linux/spinlock.h>
 #include <linux/interrupt.h>
 #include <linux/debug_locks.h>
@@ -131,14 +131,14 @@ EXPORT_SYMBOL(mutex_unlock);
  */
 static inline int __sched
 __mutex_lock_common(struct mutex *lock, long state, unsigned int subclass,
-               unsigned long ip)
+                   struct lockdep_map *nest_lock, unsigned long ip)
 {
        struct task_struct *task = current;
        struct mutex_waiter waiter;
        unsigned long flags;
 
        preempt_disable();
-       mutex_acquire(&lock->dep_map, subclass, 0, ip);
+       mutex_acquire_nest(&lock->dep_map, subclass, 0, nest_lock, ip);
 
 #ifdef CONFIG_MUTEX_SPIN_ON_OWNER
        /*
@@ -240,9 +240,7 @@ __mutex_lock_common(struct mutex *lock, long state, unsigned int subclass,
 
                /* didn't get the lock, go to sleep: */
                spin_unlock_mutex(&lock->wait_lock, flags);
-               preempt_enable_no_resched();
-               schedule();
-               preempt_disable();
+               schedule_preempt_disabled();
                spin_lock_mutex(&lock->wait_lock, flags);
        }
 
@@ -269,16 +267,25 @@ void __sched
 mutex_lock_nested(struct mutex *lock, unsigned int subclass)
 {
        might_sleep();
-       __mutex_lock_common(lock, TASK_UNINTERRUPTIBLE, subclass, _RET_IP_);
+       __mutex_lock_common(lock, TASK_UNINTERRUPTIBLE, subclass, NULL, _RET_IP_);
 }
 
 EXPORT_SYMBOL_GPL(mutex_lock_nested);
 
+void __sched
+_mutex_lock_nest_lock(struct mutex *lock, struct lockdep_map *nest)
+{
+       might_sleep();
+       __mutex_lock_common(lock, TASK_UNINTERRUPTIBLE, 0, nest, _RET_IP_);
+}
+
+EXPORT_SYMBOL_GPL(_mutex_lock_nest_lock);
+
 int __sched
 mutex_lock_killable_nested(struct mutex *lock, unsigned int subclass)
 {
        might_sleep();
-       return __mutex_lock_common(lock, TASK_KILLABLE, subclass, _RET_IP_);
+       return __mutex_lock_common(lock, TASK_KILLABLE, subclass, NULL, _RET_IP_);
 }
 EXPORT_SYMBOL_GPL(mutex_lock_killable_nested);
 
@@ -287,7 +294,7 @@ mutex_lock_interruptible_nested(struct mutex *lock, unsigned int subclass)
 {
        might_sleep();
        return __mutex_lock_common(lock, TASK_INTERRUPTIBLE,
-                                  subclass, _RET_IP_);
+                                  subclass, NULL, _RET_IP_);
 }
 
 EXPORT_SYMBOL_GPL(mutex_lock_interruptible_nested);
@@ -393,7 +400,7 @@ __mutex_lock_slowpath(atomic_t *lock_count)
 {
        struct mutex *lock = container_of(lock_count, struct mutex, count);
 
-       __mutex_lock_common(lock, TASK_UNINTERRUPTIBLE, 0, _RET_IP_);
+       __mutex_lock_common(lock, TASK_UNINTERRUPTIBLE, 0, NULL, _RET_IP_);
 }
 
 static noinline int __sched
@@ -401,7 +408,7 @@ __mutex_lock_killable_slowpath(atomic_t *lock_count)
 {
        struct mutex *lock = container_of(lock_count, struct mutex, count);
 
-       return __mutex_lock_common(lock, TASK_KILLABLE, 0, _RET_IP_);
+       return __mutex_lock_common(lock, TASK_KILLABLE, 0, NULL, _RET_IP_);
 }
 
 static noinline int __sched
@@ -409,7 +416,7 @@ __mutex_lock_interruptible_slowpath(atomic_t *lock_count)
 {
        struct mutex *lock = container_of(lock_count, struct mutex, count);
 
-       return __mutex_lock_common(lock, TASK_INTERRUPTIBLE, 0, _RET_IP_);
+       return __mutex_lock_common(lock, TASK_INTERRUPTIBLE, 0, NULL, _RET_IP_);
 }
 #endif