1 files changed, 22 insertions, 42 deletions

diff --git a/kernel/profile.c b/kernel/profile.c
index f89248e6d70..5a730fdb1a2 100644
--- a/kernel/profile.c
+++ b/kernel/profile.c
@@ -23,6 +23,7 @@
 #include <linux/cpu.h>
 #include <linux/profile.h>
 #include <linux/highmem.h>
+#include <linux/mutex.h>
 #include <asm/sections.h>
 #include <asm/semaphore.h>
 
@@ -44,7 +45,7 @@ static cpumask_t prof_cpu_mask = CPU_MASK_ALL;
 #ifdef CONFIG_SMP
 static DEFINE_PER_CPU(struct profile_hit *[2], cpu_profile_hits);
 static DEFINE_PER_CPU(int, cpu_profile_flip);
-static DECLARE_MUTEX(profile_flip_mutex);
+static DEFINE_MUTEX(profile_flip_mutex);
 #endif /* CONFIG_SMP */
 
 static int __init profile_setup(char * str)
@@ -86,72 +87,52 @@ void __init profile_init(void)
  
 #ifdef CONFIG_PROFILING
  
-static DECLARE_RWSEM(profile_rwsem);
-static DEFINE_RWLOCK(handoff_lock);
-static struct notifier_block * task_exit_notifier;
-static struct notifier_block * task_free_notifier;
-static struct notifier_block * munmap_notifier;
+static BLOCKING_NOTIFIER_HEAD(task_exit_notifier);
+static ATOMIC_NOTIFIER_HEAD(task_free_notifier);
+static BLOCKING_NOTIFIER_HEAD(munmap_notifier);
  
 void profile_task_exit(struct task_struct * task)
 {
-	down_read(&profile_rwsem);
-	notifier_call_chain(&task_exit_notifier, 0, task);
-	up_read(&profile_rwsem);
+	blocking_notifier_call_chain(&task_exit_notifier, 0, task);
 }
  
 int profile_handoff_task(struct task_struct * task)
 {
 	int ret;
-	read_lock(&handoff_lock);
-	ret = notifier_call_chain(&task_free_notifier, 0, task);
-	read_unlock(&handoff_lock);
+	ret = atomic_notifier_call_chain(&task_free_notifier, 0, task);
 	return (ret == NOTIFY_OK) ? 1 : 0;
 }
 
 void profile_munmap(unsigned long addr)
 {
-	down_read(&profile_rwsem);
-	notifier_call_chain(&munmap_notifier, 0, (void *)addr);
-	up_read(&profile_rwsem);
+	blocking_notifier_call_chain(&munmap_notifier, 0, (void *)addr);
 }
 
 int task_handoff_register(struct notifier_block * n)
 {
-	int err = -EINVAL;
-
-	write_lock(&handoff_lock);
-	err = notifier_chain_register(&task_free_notifier, n);
-	write_unlock(&handoff_lock);
-	return err;
+	return atomic_notifier_chain_register(&task_free_notifier, n);
 }
 
 int task_handoff_unregister(struct notifier_block * n)
 {
-	int err = -EINVAL;
-
-	write_lock(&handoff_lock);
-	err = notifier_chain_unregister(&task_free_notifier, n);
-	write_unlock(&handoff_lock);
-	return err;
+	return atomic_notifier_chain_unregister(&task_free_notifier, n);
 }
 
 int profile_event_register(enum profile_type type, struct notifier_block * n)
 {
 	int err = -EINVAL;
  
-	down_write(&profile_rwsem);
- 
 	switch (type) {
 		case PROFILE_TASK_EXIT:
-			err = notifier_chain_register(&task_exit_notifier, n);
+			err = blocking_notifier_chain_register(
+					&task_exit_notifier, n);
 			break;
 		case PROFILE_MUNMAP:
-			err = notifier_chain_register(&munmap_notifier, n);
+			err = blocking_notifier_chain_register(
+					&munmap_notifier, n);
 			break;
 	}
  
-	up_write(&profile_rwsem);
- 
 	return err;
 }
 
@@ -160,18 +141,17 @@ int profile_event_unregister(enum profile_type type, struct notifier_block * n)
 {
 	int err = -EINVAL;
  
-	down_write(&profile_rwsem);
- 
 	switch (type) {
 		case PROFILE_TASK_EXIT:
-			err = notifier_chain_unregister(&task_exit_notifier, n);
+			err = blocking_notifier_chain_unregister(
+					&task_exit_notifier, n);
 			break;
 		case PROFILE_MUNMAP:
-			err = notifier_chain_unregister(&munmap_notifier, n);
+			err = blocking_notifier_chain_unregister(
+					&munmap_notifier, n);
 			break;
 	}
 
-	up_write(&profile_rwsem);
 	return err;
 }
 
@@ -243,7 +223,7 @@ static void profile_flip_buffers(void)
 {
 	int i, j, cpu;
 
-	down(&profile_flip_mutex);
+	mutex_lock(&profile_flip_mutex);
 	j = per_cpu(cpu_profile_flip, get_cpu());
 	put_cpu();
 	on_each_cpu(__profile_flip_buffers, NULL, 0, 1);
@@ -259,14 +239,14 @@ static void profile_flip_buffers(void)
 			hits[i].hits = hits[i].pc = 0;
 		}
 	}
-	up(&profile_flip_mutex);
+	mutex_unlock(&profile_flip_mutex);
 }
 
 static void profile_discard_flip_buffers(void)
 {
 	int i, cpu;
 
-	down(&profile_flip_mutex);
+	mutex_lock(&profile_flip_mutex);
 	i = per_cpu(cpu_profile_flip, get_cpu());
 	put_cpu();
 	on_each_cpu(__profile_flip_buffers, NULL, 0, 1);
@@ -274,7 +254,7 @@ static void profile_discard_flip_buffers(void)
 		struct profile_hit *hits = per_cpu(cpu_profile_hits, cpu)[i];
 		memset(hits, 0, NR_PROFILE_HIT*sizeof(struct profile_hit));
 	}
-	up(&profile_flip_mutex);
+	mutex_unlock(&profile_flip_mutex);
 }
 
 void profile_hit(int type, void *__pc)