The attached patch renames DECLARE_MUTEX*() to DECLARE_SEM_MUTEX*() for the
kernel/ directory.
Signed-Off-By: David Howells <[email protected]>
---
warthog>diffstat -p1 mutex-kernel-2615rc5-2.diff
kernel/Makefile | 3
kernel/audit.c | 2
kernel/cpu.c | 2
kernel/cpuset.c | 4
kernel/irq/autoprobe.c | 2
kernel/kthread.c | 2
kernel/module.c | 4
kernel/mutex-cmpxchg.c | 298 +++++++++++++++++++++++++++++++++++++++++++++++++
kernel/mutex-xchg.c | 220 ++++++++++++++++++++++++++++++++++++
kernel/posix-timers.c | 2
kernel/power/main.c | 2
kernel/power/pm.c | 2
kernel/printk.c | 2
kernel/profile.c | 2
kernel/stop_machine.c | 2
15 files changed, 535 insertions(+), 14 deletions(-)
diff -uNrp linux-2.6.15-rc5/kernel/Makefile linux-2.6.15-rc5-mutex/kernel/Makefile
--- linux-2.6.15-rc5/kernel/Makefile 2005-12-08 16:23:55.000000000 +0000
+++ linux-2.6.15-rc5-mutex/kernel/Makefile 2005-12-16 17:38:19.000000000 +0000
@@ -33,6 +33,9 @@ obj-$(CONFIG_CRASH_DUMP) += crash_dump.o
obj-$(CONFIG_SECCOMP) += seccomp.o
obj-$(CONFIG_RCU_TORTURE_TEST) += rcutorture.o
+obj-$(CONFIG_ARCH_CMPXCHG_MUTEX) += mutex-cmpxchg.o
+obj-$(CONFIG_ARCH_XCHG_MUTEX) += mutex-xchg.o
+
ifneq ($(CONFIG_SCHED_NO_NO_OMIT_FRAME_POINTER),y)
# According to Alan Modra <[email protected]>, the -fno-omit-frame-pointer is
# needed for x86 only. Why this used to be enabled for all architectures is beyond
diff -uNrp linux-2.6.15-rc5/kernel/audit.c linux-2.6.15-rc5-mutex/kernel/audit.c
--- linux-2.6.15-rc5/kernel/audit.c 2005-12-08 16:23:55.000000000 +0000
+++ linux-2.6.15-rc5-mutex/kernel/audit.c 2005-12-15 17:14:57.000000000 +0000
@@ -113,7 +113,7 @@ static DECLARE_WAIT_QUEUE_HEAD(audit_bac
/* The netlink socket is only to be read by 1 CPU, which lets us assume
* that list additions and deletions never happen simultaneously in
* auditsc.c */
-DECLARE_MUTEX(audit_netlink_sem);
+DECLARE_SEM_MUTEX(audit_netlink_sem);
/* AUDIT_BUFSIZ is the size of the temporary buffer used for formatting
* audit records. Since printk uses a 1024 byte buffer, this buffer
diff -uNrp linux-2.6.15-rc5/kernel/cpu.c linux-2.6.15-rc5-mutex/kernel/cpu.c
--- linux-2.6.15-rc5/kernel/cpu.c 2005-12-08 16:23:55.000000000 +0000
+++ linux-2.6.15-rc5-mutex/kernel/cpu.c 2005-12-15 17:14:57.000000000 +0000
@@ -16,7 +16,7 @@
#include <asm/semaphore.h>
/* This protects CPUs going up and down... */
-static DECLARE_MUTEX(cpucontrol);
+static DECLARE_SEM_MUTEX(cpucontrol);
static struct notifier_block *cpu_chain;
diff -uNrp linux-2.6.15-rc5/kernel/cpuset.c linux-2.6.15-rc5-mutex/kernel/cpuset.c
--- linux-2.6.15-rc5/kernel/cpuset.c 2005-12-08 16:23:55.000000000 +0000
+++ linux-2.6.15-rc5-mutex/kernel/cpuset.c 2005-12-15 17:14:57.000000000 +0000
@@ -229,8 +229,8 @@ static struct super_block *cpuset_sb = N
* such matters.
*/
-static DECLARE_MUTEX(manage_sem);
-static DECLARE_MUTEX(callback_sem);
+static DECLARE_SEM_MUTEX(manage_sem);
+static DECLARE_SEM_MUTEX(callback_sem);
/*
* A couple of forward declarations required, due to cyclic reference loop:
diff -uNrp linux-2.6.15-rc5/kernel/irq/autoprobe.c linux-2.6.15-rc5-mutex/kernel/irq/autoprobe.c
--- linux-2.6.15-rc5/kernel/irq/autoprobe.c 2005-08-30 13:56:39.000000000 +0100
+++ linux-2.6.15-rc5-mutex/kernel/irq/autoprobe.c 2005-12-15 17:14:57.000000000 +0000
@@ -16,7 +16,7 @@
* comes in on to an unassigned handler will get stuck with
* "IRQ_WAITING" cleared and the interrupt disabled.
*/
-static DECLARE_MUTEX(probe_sem);
+static DECLARE_SEM_MUTEX(probe_sem);
/**
* probe_irq_on - begin an interrupt autodetect
diff -uNrp linux-2.6.15-rc5/kernel/kthread.c linux-2.6.15-rc5-mutex/kernel/kthread.c
--- linux-2.6.15-rc5/kernel/kthread.c 2005-12-08 16:23:55.000000000 +0000
+++ linux-2.6.15-rc5-mutex/kernel/kthread.c 2005-12-15 17:14:57.000000000 +0000
@@ -41,7 +41,7 @@ struct kthread_stop_info
/* Thread stopping is done by setthing this var: lock serializes
* multiple kthread_stop calls. */
-static DECLARE_MUTEX(kthread_stop_lock);
+static DECLARE_SEM_MUTEX(kthread_stop_lock);
static struct kthread_stop_info kthread_stop_info;
int kthread_should_stop(void)
diff -uNrp linux-2.6.15-rc5/kernel/module.c linux-2.6.15-rc5-mutex/kernel/module.c
--- linux-2.6.15-rc5/kernel/module.c 2005-12-08 16:23:55.000000000 +0000
+++ linux-2.6.15-rc5-mutex/kernel/module.c 2005-12-15 17:14:57.000000000 +0000
@@ -59,10 +59,10 @@
static DEFINE_SPINLOCK(modlist_lock);
/* List of modules, protected by module_mutex AND modlist_lock */
-static DECLARE_MUTEX(module_mutex);
+static DECLARE_SEM_MUTEX(module_mutex);
static LIST_HEAD(modules);
-static DECLARE_MUTEX(notify_mutex);
+static DECLARE_SEM_MUTEX(notify_mutex);
static struct notifier_block * module_notify_list;
int register_module_notifier(struct notifier_block * nb)
diff -uNrp linux-2.6.15-rc5/kernel/mutex-cmpxchg.c linux-2.6.15-rc5-mutex/kernel/mutex-cmpxchg.c
--- linux-2.6.15-rc5/kernel/mutex-cmpxchg.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.15-rc5-mutex/kernel/mutex-cmpxchg.c 2005-12-15 17:25:06.000000000 +0000
@@ -0,0 +1,298 @@
+/* mutex-cmpxchg.c: cmpxchg-based mutex slow paths
+ *
+ * Copyright (C) 2005 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells ([email protected])
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/config.h>
+#include <linux/sched.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+
+struct mutex_waiter {
+ struct list_head list;
+ struct task_struct *task;
+};
+
+#define CONTENTION_FLAG 1UL
+
+/*
+ * wait for a token to be granted from a mutex
+ * - noinlined to improve the fastpath case
+ */
+static noinline fastcall __sched
+void __mutex_lock(struct mutex *mutex, unsigned long me)
+{
+ struct mutex_waiter waiter;
+ struct task_struct *tsk;
+ unsigned long flags, state, old;
+
+ me = (unsigned long) current_thread_info();
+
+ /* slow path */
+ spin_lock_irqsave(&mutex->wait_lock, flags);
+
+ do {
+ /* see if we can grab the mutex immediately */
+ state = __mutex_cmpxchg(mutex, 0, me);
+ if (!state) {
+ /* we did */
+ spin_unlock_irqrestore(&mutex->wait_lock, flags);
+ return;
+ }
+
+ if (state & CONTENTION_FLAG)
+ goto sleep; /* already flagged for contention */
+
+ /* attempt to mark the mutex as being contended
+ * - it may get released whilst we're doing this
+ */
+ do {
+ old = state;
+ state = __mutex_cmpxchg(mutex, state,
+ old | CONTENTION_FLAG);
+
+ } while (state && state != old);
+ } while (!state);
+
+sleep:
+ /* need to sleep; set up my own style of waitqueue */
+ tsk = current;
+ waiter.task = tsk;
+
+ get_task_struct(tsk);
+ list_add_tail(&waiter.list, &mutex->wait_list);
+
+ /* we don't need to touch the mutex struct anymore */
+ spin_unlock_irqrestore(&mutex->wait_lock, flags);
+
+ /* wait to be given the mutex */
+ set_task_state(tsk, TASK_UNINTERRUPTIBLE);
+
+ for (;;) {
+ if (!waiter.task)
+ break;
+ schedule();
+ set_task_state(tsk, TASK_UNINTERRUPTIBLE);
+ }
+
+ tsk->state = TASK_RUNNING;
+}
+
+/*
+ * fast path for attempting to grab the mutex
+ */
+fastcall __sched void mutex_lock(struct mutex *mutex)
+{
+ unsigned long me = __mutex_owner();
+
+ if (likely(__mutex_cmpxchg(mutex, 0, me) == 0))
+ return;
+
+ /* tail-call the slow path */
+ __mutex_lock(mutex, me);
+}
+
+EXPORT_SYMBOL(mutex_lock);
+
+/*
+ * slow path to interruptibly wait for a mutex to be granted to the caller
+ * - noinlined to improve the fastpath case
+ */
+static noinline fastcall __sched
+int __mutex_lock_interruptible(struct mutex *mutex, unsigned long me)
+{
+ struct mutex_waiter waiter;
+ struct task_struct *tsk;
+ unsigned long flags, state, old;
+ int ret;
+
+ spin_lock_irqsave(&mutex->wait_lock, flags);
+
+ do {
+ /* see if we can grab the mutex immediately */
+ state = __mutex_cmpxchg(mutex, 0, me);
+ if (!state) {
+ /* we did */
+ spin_unlock_irqrestore(&mutex->wait_lock, flags);
+ return 0;
+ }
+
+ if (unlikely(signal_pending(current)))
+ goto early_interrupt;
+
+ if (state & CONTENTION_FLAG)
+ goto sleep; /* already flagged for contention */
+
+ /* attempt to mark the mutex as being contended
+ * - it may get released whilst we're doing this
+ */
+ do {
+ old = state;
+ state = __mutex_cmpxchg(mutex, state,
+ old | CONTENTION_FLAG);
+
+ } while (state && state != old);
+ } while (!state);
+
+sleep:
+ /* need to sleep; set up my own style of waitqueue */
+ tsk = current;
+ waiter.task = tsk;
+
+ get_task_struct(tsk);
+ list_add_tail(&waiter.list, &mutex->wait_list);
+
+ /* we don't need to touch the mutex struct anymore */
+ set_task_state(tsk, TASK_INTERRUPTIBLE);
+
+ spin_unlock_irqrestore(&mutex->wait_lock, flags);
+
+ /* wait to be given the mutex */
+ for (;;) {
+ if (!waiter.task)
+ break;
+ if (unlikely(signal_pending(current)))
+ goto interrupted;
+ schedule();
+ set_task_state(tsk, TASK_INTERRUPTIBLE);
+ }
+
+ tsk->state = TASK_RUNNING;
+ return 0;
+
+interrupted:
+ spin_lock_irqsave(&mutex->wait_lock, flags);
+ list_del(&waiter.list);
+ spin_unlock_irqrestore(&mutex->wait_lock, flags);
+
+ /* we may still have been given the mutex */
+ ret = 0;
+ if (waiter.task) {
+ put_task_struct(current);
+ ret = -EINTR;
+ }
+ return ret;
+
+early_interrupt:
+ spin_unlock_irqrestore(&mutex->wait_lock, flags);
+ return -EINTR;
+}
+
+/*
+ * fast path for attempting to grab the mutex interruptibly
+ */
+fastcall __sched
+int mutex_lock_interruptible(struct mutex *mutex)
+{
+ unsigned long me = __mutex_owner();
+
+ if (likely(__mutex_cmpxchg(mutex, 0, me) == 0))
+ return 0;
+
+ /* tail-call the slow path */
+ return __mutex_lock_interruptible(mutex, me);
+}
+
+EXPORT_SYMBOL(mutex_lock_interruptible);
+
+/*
+ * report an unlock that doesn't balance a lock in the right context
+ */
+#ifdef CONFIG_DEBUG_MUTEX_OWNER
+static void __bad_mutex_state(struct mutex *mutex)
+{
+ struct task_struct *owner =
+ ((struct thread_info *)
+ (mutex->state & ~CONTENTION_FLAG)
+ )->task;
+
+ BUG_ON(mutex->state == CONTENTION_FLAG);
+
+ if (!mutex->state) {
+ printk(KERN_ERR
+ "BUG: process %d [%s] releasing unowned mutex\n",
+ current->pid,
+ current->comm);
+ }
+ else {
+ printk(KERN_ERR
+ "BUG: process %d [%s] releasing mutex owned by %d [%s]\n",
+ current->pid,
+ current->comm,
+ owner->pid,
+ owner->comm);
+ }
+}
+#endif
+
+/*
+ * slow path to release a mutex that's under contention
+ * - the queue should not be empty
+ * - noinlined to improve the fastpath case
+ */
+static noinline fastcall __sched
+void __mutex_unlock(struct mutex *mutex, unsigned long me)
+{
+ struct mutex_waiter *waiter;
+ struct task_struct *tsk;
+ unsigned long flags, state;
+
+ /* slow path */
+#ifdef CONFIG_DEBUG_MUTEX_OWNER
+ if ((mutex->state & ~CONTENTION_FLAG) != me)
+ __bad_mutex_state(mutex);
+#endif
+
+ /* must prevent a race */
+ spin_lock_irqsave(&mutex->wait_lock, flags);
+
+ if (!list_empty(&mutex->wait_list)) {
+ /* grant the token to the process at the front of the queue */
+ waiter = list_entry(mutex->wait_list.next,
+ struct mutex_waiter, list);
+
+ /* we must be careful not to touch 'waiter' after we set ->task
+ * to NULL.
+ * - it is an allocated on the waiter's stack and may become
+ * invalid at any time after that point (due to a wakeup from
+ * another source).
+ */
+ list_del_init(&waiter->list);
+ tsk = waiter->task;
+ state = (unsigned long) tsk;
+ if (!list_empty(&waiter->list))
+ state |= CONTENTION_FLAG;
+ mutex->state = state;
+ smp_mb();
+ waiter->task = NULL;
+ wake_up_process(tsk);
+ put_task_struct(tsk);
+ }
+ else {
+ mutex->state = 0;
+ }
+
+ spin_unlock_irqrestore(&mutex->wait_lock, flags);
+}
+
+/*
+ * fast path to release a mutex
+ */
+fastcall __sched
+void mutex_unlock(struct mutex *mutex)
+{
+ unsigned long me = __mutex_owner();
+
+ if (__mutex_cmpxchg(mutex, me, 0) == me)
+ return;
+
+ __mutex_unlock(mutex, me);
+}
+
+EXPORT_SYMBOL(mutex_unlock);
diff -uNrp linux-2.6.15-rc5/kernel/mutex-xchg.c linux-2.6.15-rc5-mutex/kernel/mutex-xchg.c
--- linux-2.6.15-rc5/kernel/mutex-xchg.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.15-rc5-mutex/kernel/mutex-xchg.c 2005-12-15 19:44:13.000000000 +0000
@@ -0,0 +1,220 @@
+/* mutex-xchg.c: simple exchange-based mutex slow paths
+ *
+ * Copyright (C) 2005 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells ([email protected])
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/config.h>
+#include <linux/sched.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+
+struct mutex_waiter {
+ struct list_head list;
+ struct task_struct *task;
+};
+
+/*
+ * wait for a token to be granted from a mutex
+ */
+noinline fastcall __sched
+void __mutex_lock(struct mutex *mutex)
+{
+ struct mutex_waiter waiter;
+ struct task_struct *tsk = current;
+ unsigned long flags;
+
+ /* set up my own style of waitqueue */
+ waiter.task = tsk;
+
+ spin_lock_irqsave(&mutex->wait_lock, flags);
+
+ if (mutex_trylock(mutex)) {
+ /* we got the mutex anyway */
+ spin_unlock_irqrestore(&mutex->wait_lock, flags);
+ return;
+ }
+
+ /* need to sleep */
+ get_task_struct(tsk);
+ list_add_tail(&waiter.list, &mutex->wait_list);
+
+ /* we don't need to touch the mutex struct anymore */
+ spin_unlock_irqrestore(&mutex->wait_lock, flags);
+
+ /* wait to be given the mutex */
+ set_task_state(tsk, TASK_UNINTERRUPTIBLE);
+
+ for (;;) {
+ if (!waiter.task)
+ break;
+ schedule();
+ set_task_state(tsk, TASK_UNINTERRUPTIBLE);
+ }
+
+ tsk->state = TASK_RUNNING;
+}
+
+/*
+ * fast path for attempting to grab the mutex
+ */
+#if 0
+fastcall __sched
+void mutex_lock(struct mutex *mutex)
+{
+ if (!mutex_trylock(mutex))
+ __mutex_lock(mutex);
+}
+#endif
+
+EXPORT_SYMBOL(__mutex_lock);
+
+/*
+ * slow path to interruptibly wait for a mutex to be granted to the caller
+ */
+noinline fastcall __sched
+int __mutex_lock_interruptible(struct mutex *mutex)
+{
+ struct mutex_waiter waiter;
+ struct task_struct *tsk = current;
+ unsigned long flags;
+ int ret;
+
+ /* set up my own style of waitqueue */
+ waiter.task = tsk;
+
+ spin_lock_irqsave(&mutex->wait_lock, flags);
+
+ if (mutex_trylock(mutex)) {
+ /* we got the mutex anyway */
+ spin_unlock_irqrestore(&mutex->wait_lock, flags);
+ return 0;
+ }
+
+ /* need to sleep */
+ get_task_struct(tsk);
+ list_add_tail(&waiter.list, &mutex->wait_list);
+
+ /* we don't need to touch the mutex struct anymore */
+ set_task_state(tsk, TASK_INTERRUPTIBLE);
+
+ spin_unlock_irqrestore(&mutex->wait_lock, flags);
+
+ /* wait to be given the mutex */
+ for (;;) {
+ if (!waiter.task)
+ break;
+ if (unlikely(signal_pending(current)))
+ goto interrupted;
+ schedule();
+ set_task_state(tsk, TASK_INTERRUPTIBLE);
+ }
+
+ tsk->state = TASK_RUNNING;
+ return 0;
+
+interrupted:
+ spin_lock_irqsave(&mutex->wait_lock, flags);
+ list_del(&waiter.list);
+ spin_unlock_irqrestore(&mutex->wait_lock, flags);
+
+ /* we may still have been given the mutex */
+ ret = 0;
+ if (waiter.task) {
+ put_task_struct(current);
+ ret = -EINTR;
+ }
+ return ret;
+}
+
+/*
+ * fast path for attempting to grab the mutex interruptibly
+ */
+#if 0
+fastcall __sched
+int mutex_lock_interruptible(struct mutex *mutex)
+{
+ if (mutex_trylock(mutex))
+ return 0;
+
+ return __mutex_lock_interruptible(mutex);
+}
+#endif
+
+EXPORT_SYMBOL(__mutex_lock_interruptible);
+
+/*
+ * report an up() that doesn't match a mutex_lock()
+ */
+#ifdef CONFIG_DEBUG_MUTEX_OWNER
+static void __bad_mutex_state(struct mutex *mutex)
+{
+ if (!mutex->__owner) {
+ printk(KERN_ERR
+ "BUG: process %d [%s] releasing unowned mutex\n",
+ current->pid,
+ current->comm);
+ }
+ else {
+ printk(KERN_ERR
+ "BUG: process %d [%s] releasing mutex owned by %d [%s]\n",
+ current->pid,
+ current->comm,
+ mutex->__owner->pid,
+ mutex->__owner->comm);
+ }
+}
+#endif
+
+/*
+ * release a mutex
+ */
+void fastcall __sched mutex_unlock(struct mutex *mutex)
+{
+ struct mutex_waiter *waiter;
+ struct task_struct *tsk;
+ unsigned long flags;
+
+#ifdef CONFIG_DEBUG_MUTEX_OWNER
+ if (mutex->__owner != current)
+ __bad_mutex_state(mutex);
+ mutex->__owner = NULL;
+#endif
+
+ /* must prevent a race */
+ spin_lock_irqsave(&mutex->wait_lock, flags);
+
+ if (!list_empty(&mutex->wait_list)) {
+ /* grant the token to the process at the front of the queue */
+ waiter = list_entry(mutex->wait_list.next,
+ struct mutex_waiter, list);
+
+ /* we must be careful not to touch 'waiter' after we set ->task
+ * to NULL.
+ * - it is an allocated on the waiter's stack and may become
+ * invalid at any time after that point (due to a wakeup from
+ * another source).
+ */
+ list_del_init(&waiter->list);
+ tsk = waiter->task;
+#ifdef CONFIG_DEBUG_MUTEX_OWNER
+ mutex->__owner = tsk;
+#endif
+ smp_mb();
+ waiter->task = NULL;
+ wake_up_process(tsk);
+ put_task_struct(tsk);
+ }
+ else {
+ __mutex_release(mutex);
+ }
+
+ spin_unlock_irqrestore(&mutex->wait_lock, flags);
+}
+
+EXPORT_SYMBOL(mutex_unlock);
diff -uNrp linux-2.6.15-rc5/kernel/posix-timers.c linux-2.6.15-rc5-mutex/kernel/posix-timers.c
--- linux-2.6.15-rc5/kernel/posix-timers.c 2005-12-08 16:23:55.000000000 +0000
+++ linux-2.6.15-rc5-mutex/kernel/posix-timers.c 2005-12-15 17:14:57.000000000 +0000
@@ -1312,7 +1312,7 @@ sys_clock_getres(clockid_t which_clock,
static DECLARE_WAIT_QUEUE_HEAD(nanosleep_abs_wqueue);
static DECLARE_WORK(clock_was_set_work, (void(*)(void*))clock_was_set, NULL);
-static DECLARE_MUTEX(clock_was_set_lock);
+static DECLARE_SEM_MUTEX(clock_was_set_lock);
void clock_was_set(void)
{
diff -uNrp linux-2.6.15-rc5/kernel/power/main.c linux-2.6.15-rc5-mutex/kernel/power/main.c
--- linux-2.6.15-rc5/kernel/power/main.c 2005-12-08 16:23:55.000000000 +0000
+++ linux-2.6.15-rc5-mutex/kernel/power/main.c 2005-12-15 17:14:57.000000000 +0000
@@ -22,7 +22,7 @@
/*This is just an arbitrary number */
#define FREE_PAGE_NUMBER (100)
-DECLARE_MUTEX(pm_sem);
+DECLARE_SEM_MUTEX(pm_sem);
struct pm_ops *pm_ops;
suspend_disk_method_t pm_disk_mode = PM_DISK_SHUTDOWN;
diff -uNrp linux-2.6.15-rc5/kernel/power/pm.c linux-2.6.15-rc5-mutex/kernel/power/pm.c
--- linux-2.6.15-rc5/kernel/power/pm.c 2005-12-08 16:23:55.000000000 +0000
+++ linux-2.6.15-rc5-mutex/kernel/power/pm.c 2005-12-15 17:14:57.000000000 +0000
@@ -40,7 +40,7 @@ int pm_active;
* until a resume but that will be fine.
*/
-static DECLARE_MUTEX(pm_devs_lock);
+static DECLARE_SEM_MUTEX(pm_devs_lock);
static LIST_HEAD(pm_devs);
/**
diff -uNrp linux-2.6.15-rc5/kernel/printk.c linux-2.6.15-rc5-mutex/kernel/printk.c
--- linux-2.6.15-rc5/kernel/printk.c 2005-12-08 16:23:56.000000000 +0000
+++ linux-2.6.15-rc5-mutex/kernel/printk.c 2005-12-15 17:14:57.000000000 +0000
@@ -66,7 +66,7 @@ EXPORT_SYMBOL(oops_in_progress);
* provides serialisation for access to the entire console
* driver system.
*/
-static DECLARE_MUTEX(console_sem);
+static DECLARE_SEM_MUTEX(console_sem);
struct console *console_drivers;
/*
* This is used for debugging the mess that is the VT code by
diff -uNrp linux-2.6.15-rc5/kernel/profile.c linux-2.6.15-rc5-mutex/kernel/profile.c
--- linux-2.6.15-rc5/kernel/profile.c 2005-08-30 13:56:40.000000000 +0100
+++ linux-2.6.15-rc5-mutex/kernel/profile.c 2005-12-15 17:14:57.000000000 +0000
@@ -44,7 +44,7 @@ static cpumask_t prof_cpu_mask = CPU_MAS
#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 DECLARE_SEM_MUTEX(profile_flip_mutex);
#endif /* CONFIG_SMP */
static int __init profile_setup(char * str)
diff -uNrp linux-2.6.15-rc5/kernel/stop_machine.c linux-2.6.15-rc5-mutex/kernel/stop_machine.c
--- linux-2.6.15-rc5/kernel/stop_machine.c 2005-12-08 16:23:56.000000000 +0000
+++ linux-2.6.15-rc5-mutex/kernel/stop_machine.c 2005-12-15 17:14:57.000000000 +0000
@@ -23,7 +23,7 @@ enum stopmachine_state {
static enum stopmachine_state stopmachine_state;
static unsigned int stopmachine_num_threads;
static atomic_t stopmachine_thread_ack;
-static DECLARE_MUTEX(stopmachine_mutex);
+static DECLARE_SEM_MUTEX(stopmachine_mutex);
static int stopmachine(void *cpu)
{
-
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