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Merge branch 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

浏览代码 
* 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (26 commits)
  clockevents: Convert to raw_spinlock
  clockevents: Make tick_device_lock static
  debugobjects: Convert to raw_spinlocks
  perf_event: Convert to raw_spinlock
  hrtimers: Convert to raw_spinlocks
  genirq: Convert irq_desc.lock to raw_spinlock
  smp: Convert smplocks to raw_spinlocks
  rtmutes: Convert rtmutex.lock to raw_spinlock
  sched: Convert pi_lock to raw_spinlock
  sched: Convert cpupri lock to raw_spinlock
  sched: Convert rt_runtime_lock to raw_spinlock
  sched: Convert rq->lock to raw_spinlock
  plist: Make plist debugging raw_spinlock aware
  bkl: Fixup core_lock fallout
  locking: Cleanup the name space completely
  locking: Further name space cleanups
  alpha: Fix fallout from locking changes
  locking: Implement new raw_spinlock
  locking: Convert raw_rwlock functions to arch_rwlock
  locking: Convert raw_rwlock to arch_rwlock
  ...
这个提交包含在：
Linus Torvalds
2009-12-15 09:02:01 -08:00
父节点 050cbb09da b5f91da0a6
当前提交 8f0ddf91f2
共修改 136 个文件，包含 2485 行新增和 2177 行删除
下载 Patch 文件 下载 Diff 文件 展开所有文件 折叠所有文件

74
lib/debugobjects.c
查看文件

@@ -26,14 +26,14 @@
struct debug_bucket {
struct hlist_head list;
spinlock_t lock;
raw_spinlock_t lock;
};
static struct debug_bucket obj_hash[ODEBUG_HASH_SIZE];
static struct debug_obj obj_static_pool[ODEBUG_POOL_SIZE] __initdata;
static DEFINE_SPINLOCK(pool_lock);
static DEFINE_RAW_SPINLOCK(pool_lock);
static HLIST_HEAD(obj_pool);
@@ -96,10 +96,10 @@ static int fill_pool(void)
if (!new)
return obj_pool_free;
spin_lock_irqsave(&pool_lock, flags);
raw_spin_lock_irqsave(&pool_lock, flags);
hlist_add_head(&new->node, &obj_pool);
obj_pool_free++;
spin_unlock_irqrestore(&pool_lock, flags);
raw_spin_unlock_irqrestore(&pool_lock, flags);
}
return obj_pool_free;
}
@@ -133,7 +133,7 @@ alloc_object(void *addr, struct debug_bucket *b, struct debug_obj_descr *descr)
{
struct debug_obj *obj = NULL;
spin_lock(&pool_lock);
raw_spin_lock(&pool_lock);
if (obj_pool.first) {
obj = hlist_entry(obj_pool.first, typeof(*obj), node);
@@ -152,7 +152,7 @@ alloc_object(void *addr, struct debug_bucket *b, struct debug_obj_descr *descr)
if (obj_pool_free < obj_pool_min_free)
obj_pool_min_free = obj_pool_free;
}
spin_unlock(&pool_lock);
raw_spin_unlock(&pool_lock);
return obj;
}
@@ -165,7 +165,7 @@ static void free_obj_work(struct work_struct *work)
struct debug_obj *obj;
unsigned long flags;
spin_lock_irqsave(&pool_lock, flags);
raw_spin_lock_irqsave(&pool_lock, flags);
while (obj_pool_free > ODEBUG_POOL_SIZE) {
obj = hlist_entry(obj_pool.first, typeof(*obj), node);
hlist_del(&obj->node);
@@ -174,11 +174,11 @@ static void free_obj_work(struct work_struct *work)
* We release pool_lock across kmem_cache_free() to
* avoid contention on pool_lock.
*/
spin_unlock_irqrestore(&pool_lock, flags);
raw_spin_unlock_irqrestore(&pool_lock, flags);
kmem_cache_free(obj_cache, obj);
spin_lock_irqsave(&pool_lock, flags);
raw_spin_lock_irqsave(&pool_lock, flags);
}
spin_unlock_irqrestore(&pool_lock, flags);
raw_spin_unlock_irqrestore(&pool_lock, flags);
}
/*
@@ -190,7 +190,7 @@ static void free_object(struct debug_obj *obj)
unsigned long flags;
int sched = 0;
spin_lock_irqsave(&pool_lock, flags);
raw_spin_lock_irqsave(&pool_lock, flags);
/*
* schedule work when the pool is filled and the cache is
* initialized:
@@ -200,7 +200,7 @@ static void free_object(struct debug_obj *obj)
hlist_add_head(&obj->node, &obj_pool);
obj_pool_free++;
obj_pool_used--;
spin_unlock_irqrestore(&pool_lock, flags);
raw_spin_unlock_irqrestore(&pool_lock, flags);
if (sched)
schedule_work(&debug_obj_work);
}
@@ -221,9 +221,9 @@ static void debug_objects_oom(void)
printk(KERN_WARNING "ODEBUG: Out of memory. ODEBUG disabled\n");
for (i = 0; i < ODEBUG_HASH_SIZE; i++, db++) {
spin_lock_irqsave(&db->lock, flags);
raw_spin_lock_irqsave(&db->lock, flags);
hlist_move_list(&db->list, &freelist);
spin_unlock_irqrestore(&db->lock, flags);
raw_spin_unlock_irqrestore(&db->lock, flags);
/* Now free them */
hlist_for_each_entry_safe(obj, node, tmp, &freelist, node) {
@@ -303,14 +303,14 @@ __debug_object_init(void *addr, struct debug_obj_descr *descr, int onstack)
db = get_bucket((unsigned long) addr);
spin_lock_irqsave(&db->lock, flags);
raw_spin_lock_irqsave(&db->lock, flags);
obj = lookup_object(addr, db);
if (!obj) {
obj = alloc_object(addr, db, descr);
if (!obj) {
debug_objects_enabled = 0;
spin_unlock_irqrestore(&db->lock, flags);
raw_spin_unlock_irqrestore(&db->lock, flags);
debug_objects_oom();
return;
}
@@ -327,7 +327,7 @@ __debug_object_init(void *addr, struct debug_obj_descr *descr, int onstack)
case ODEBUG_STATE_ACTIVE:
debug_print_object(obj, "init");
state = obj->state;
spin_unlock_irqrestore(&db->lock, flags);
raw_spin_unlock_irqrestore(&db->lock, flags);
debug_object_fixup(descr->fixup_init, addr, state);
return;
@@ -338,7 +338,7 @@ __debug_object_init(void *addr, struct debug_obj_descr *descr, int onstack)
break;
}
spin_unlock_irqrestore(&db->lock, flags);
raw_spin_unlock_irqrestore(&db->lock, flags);
}
/**
@@ -385,7 +385,7 @@ void debug_object_activate(void *addr, struct debug_obj_descr *descr)
db = get_bucket((unsigned long) addr);
spin_lock_irqsave(&db->lock, flags);
raw_spin_lock_irqsave(&db->lock, flags);
obj = lookup_object(addr, db);
if (obj) {
@@ -398,7 +398,7 @@ void debug_object_activate(void *addr, struct debug_obj_descr *descr)
case ODEBUG_STATE_ACTIVE:
debug_print_object(obj, "activate");
state = obj->state;
spin_unlock_irqrestore(&db->lock, flags);
raw_spin_unlock_irqrestore(&db->lock, flags);
debug_object_fixup(descr->fixup_activate, addr, state);
return;
@@ -408,11 +408,11 @@ void debug_object_activate(void *addr, struct debug_obj_descr *descr)
default:
break;
}
spin_unlock_irqrestore(&db->lock, flags);
raw_spin_unlock_irqrestore(&db->lock, flags);
return;
}
spin_unlock_irqrestore(&db->lock, flags);
raw_spin_unlock_irqrestore(&db->lock, flags);
/*
* This happens when a static object is activated. We
* let the type specific code decide whether this is
@@ -438,7 +438,7 @@ void debug_object_deactivate(void *addr, struct debug_obj_descr *descr)
db = get_bucket((unsigned long) addr);
spin_lock_irqsave(&db->lock, flags);
raw_spin_lock_irqsave(&db->lock, flags);
obj = lookup_object(addr, db);
if (obj) {
@@ -463,7 +463,7 @@ void debug_object_deactivate(void *addr, struct debug_obj_descr *descr)
debug_print_object(&o, "deactivate");
}
spin_unlock_irqrestore(&db->lock, flags);
raw_spin_unlock_irqrestore(&db->lock, flags);
}
/**
@@ -483,7 +483,7 @@ void debug_object_destroy(void *addr, struct debug_obj_descr *descr)
db = get_bucket((unsigned long) addr);
spin_lock_irqsave(&db->lock, flags);
raw_spin_lock_irqsave(&db->lock, flags);
obj = lookup_object(addr, db);
if (!obj)
@@ -498,7 +498,7 @@ void debug_object_destroy(void *addr, struct debug_obj_descr *descr)
case ODEBUG_STATE_ACTIVE:
debug_print_object(obj, "destroy");
state = obj->state;
spin_unlock_irqrestore(&db->lock, flags);
raw_spin_unlock_irqrestore(&db->lock, flags);
debug_object_fixup(descr->fixup_destroy, addr, state);
return;
@@ -509,7 +509,7 @@ void debug_object_destroy(void *addr, struct debug_obj_descr *descr)
break;
}
out_unlock:
spin_unlock_irqrestore(&db->lock, flags);
raw_spin_unlock_irqrestore(&db->lock, flags);
}
/**
@@ -529,7 +529,7 @@ void debug_object_free(void *addr, struct debug_obj_descr *descr)
db = get_bucket((unsigned long) addr);
spin_lock_irqsave(&db->lock, flags);
raw_spin_lock_irqsave(&db->lock, flags);
obj = lookup_object(addr, db);
if (!obj)
@@ -539,17 +539,17 @@ void debug_object_free(void *addr, struct debug_obj_descr *descr)
case ODEBUG_STATE_ACTIVE:
debug_print_object(obj, "free");
state = obj->state;
spin_unlock_irqrestore(&db->lock, flags);
raw_spin_unlock_irqrestore(&db->lock, flags);
debug_object_fixup(descr->fixup_free, addr, state);
return;
default:
hlist_del(&obj->node);
spin_unlock_irqrestore(&db->lock, flags);
raw_spin_unlock_irqrestore(&db->lock, flags);
free_object(obj);
return;
}
out_unlock:
spin_unlock_irqrestore(&db->lock, flags);
raw_spin_unlock_irqrestore(&db->lock, flags);
}
#ifdef CONFIG_DEBUG_OBJECTS_FREE
@@ -575,7 +575,7 @@ static void __debug_check_no_obj_freed(const void *address, unsigned long size)
repeat:
cnt = 0;
spin_lock_irqsave(&db->lock, flags);
raw_spin_lock_irqsave(&db->lock, flags);
hlist_for_each_entry_safe(obj, node, tmp, &db->list, node) {
cnt++;
oaddr = (unsigned long) obj->object;
@@ -587,7 +587,7 @@ repeat:
debug_print_object(obj, "free");
descr = obj->descr;
state = obj->state;
spin_unlock_irqrestore(&db->lock, flags);
raw_spin_unlock_irqrestore(&db->lock, flags);
debug_object_fixup(descr->fixup_free,
(void *) oaddr, state);
goto repeat;
@@ -597,7 +597,7 @@ repeat:
break;
}
}
spin_unlock_irqrestore(&db->lock, flags);
raw_spin_unlock_irqrestore(&db->lock, flags);
/* Now free them */
hlist_for_each_entry_safe(obj, node, tmp, &freelist, node) {
@@ -783,7 +783,7 @@ check_results(void *addr, enum debug_obj_state state, int fixups, int warnings)
db = get_bucket((unsigned long) addr);
spin_lock_irqsave(&db->lock, flags);
raw_spin_lock_irqsave(&db->lock, flags);
obj = lookup_object(addr, db);
if (!obj && state != ODEBUG_STATE_NONE) {
@@ -807,7 +807,7 @@ check_results(void *addr, enum debug_obj_state state, int fixups, int warnings)
}
res = 0;
out:
spin_unlock_irqrestore(&db->lock, flags);
raw_spin_unlock_irqrestore(&db->lock, flags);
if (res)
debug_objects_enabled = 0;
return res;
@@ -907,7 +907,7 @@ void __init debug_objects_early_init(void)
int i;
for (i = 0; i < ODEBUG_HASH_SIZE; i++)
spin_lock_init(&obj_hash[i].lock);
raw_spin_lock_init(&obj_hash[i].lock);
for (i = 0; i < ODEBUG_POOL_SIZE; i++)
hlist_add_head(&obj_static_pool[i].node, &obj_pool);

22
lib/kernel_lock.c
查看文件

@@ -23,7 +23,7 @@
*
* Don't use in new code.
*/
static __cacheline_aligned_in_smp DEFINE_SPINLOCK(kernel_flag);
static __cacheline_aligned_in_smp DEFINE_RAW_SPINLOCK(kernel_flag);
/*
@@ -36,12 +36,12 @@ static __cacheline_aligned_in_smp DEFINE_SPINLOCK(kernel_flag);
* If it successfully gets the lock, it should increment
* the preemption count like any spinlock does.
*
* (This works on UP too - _raw_spin_trylock will never
* (This works on UP too - do_raw_spin_trylock will never
* return false in that case)
*/
int __lockfunc __reacquire_kernel_lock(void)
{
while (!_raw_spin_trylock(&kernel_flag)) {
while (!do_raw_spin_trylock(&kernel_flag)) {
if (need_resched())
return -EAGAIN;
cpu_relax();
@@ -52,27 +52,27 @@ int __lockfunc __reacquire_kernel_lock(void)
void __lockfunc __release_kernel_lock(void)
{
_raw_spin_unlock(&kernel_flag);
do_raw_spin_unlock(&kernel_flag);
preempt_enable_no_resched();
}
/*
* These are the BKL spinlocks - we try to be polite about preemption.
* If SMP is not on (ie UP preemption), this all goes away because the
* _raw_spin_trylock() will always succeed.
* do_raw_spin_trylock() will always succeed.
*/
#ifdef CONFIG_PREEMPT
static inline void __lock_kernel(void)
{
preempt_disable();
if (unlikely(!_raw_spin_trylock(&kernel_flag))) {
if (unlikely(!do_raw_spin_trylock(&kernel_flag))) {
/*
* If preemption was disabled even before this
* was called, there's nothing we can be polite
* about - just spin.
*/
if (preempt_count() > 1) {
_raw_spin_lock(&kernel_flag);
do_raw_spin_lock(&kernel_flag);
return;
}
@@ -82,10 +82,10 @@ static inline void __lock_kernel(void)
*/
do {
preempt_enable();
while (spin_is_locked(&kernel_flag))
while (raw_spin_is_locked(&kernel_flag))
cpu_relax();
preempt_disable();
} while (!_raw_spin_trylock(&kernel_flag));
} while (!do_raw_spin_trylock(&kernel_flag));
}
}
@@ -96,7 +96,7 @@ static inline void __lock_kernel(void)
*/
static inline void __lock_kernel(void)
{
_raw_spin_lock(&kernel_flag);
do_raw_spin_lock(&kernel_flag);
}
#endif
@@ -106,7 +106,7 @@ static inline void __unlock_kernel(void)
* the BKL is not covered by lockdep, so we open-code the
* unlocking sequence (and thus avoid the dep-chain ops):
*/
_raw_spin_unlock(&kernel_flag);
do_raw_spin_unlock(&kernel_flag);
preempt_enable();
}

8
lib/plist.c
查看文件

@@ -54,9 +54,11 @@ static void plist_check_list(struct list_head *top)
static void plist_check_head(struct plist_head *head)
{
WARN_ON(!head->lock);
if (head->lock)
WARN_ON_SMP(!spin_is_locked(head->lock));
WARN_ON(!head->rawlock && !head->spinlock);
if (head->rawlock)
WARN_ON_SMP(!raw_spin_is_locked(head->rawlock));
if (head->spinlock)
WARN_ON_SMP(!spin_is_locked(head->spinlock));
plist_check_list(&head->prio_list);
plist_check_list(&head->node_list);
}

64
lib/spinlock_debug.c
查看文件

@@ -13,8 +13,8 @@
#include <linux/delay.h>
#include <linux/module.h>
void __spin_lock_init(spinlock_t *lock, const char *name,
struct lock_class_key *key)
void __raw_spin_lock_init(raw_spinlock_t *lock, const char *name,
struct lock_class_key *key)
{
#ifdef CONFIG_DEBUG_LOCK_ALLOC
/*
@@ -23,13 +23,13 @@ void __spin_lock_init(spinlock_t *lock, const char *name,
debug_check_no_locks_freed((void *)lock, sizeof(*lock));
lockdep_init_map(&lock->dep_map, name, key, 0);
#endif
lock->raw_lock = (raw_spinlock_t)__RAW_SPIN_LOCK_UNLOCKED;
lock->raw_lock = (arch_spinlock_t)__ARCH_SPIN_LOCK_UNLOCKED;
lock->magic = SPINLOCK_MAGIC;
lock->owner = SPINLOCK_OWNER_INIT;
lock->owner_cpu = -1;
}
EXPORT_SYMBOL(__spin_lock_init);
EXPORT_SYMBOL(__raw_spin_lock_init);
void __rwlock_init(rwlock_t *lock, const char *name,
struct lock_class_key *key)
@@ -41,7 +41,7 @@ void __rwlock_init(rwlock_t *lock, const char *name,
debug_check_no_locks_freed((void *)lock, sizeof(*lock));
lockdep_init_map(&lock->dep_map, name, key, 0);
#endif
lock->raw_lock = (raw_rwlock_t) __RAW_RW_LOCK_UNLOCKED;
lock->raw_lock = (arch_rwlock_t) __ARCH_RW_LOCK_UNLOCKED;
lock->magic = RWLOCK_MAGIC;
lock->owner = SPINLOCK_OWNER_INIT;
lock->owner_cpu = -1;
@@ -49,7 +49,7 @@ void __rwlock_init(rwlock_t *lock, const char *name,
EXPORT_SYMBOL(__rwlock_init);
static void spin_bug(spinlock_t *lock, const char *msg)
static void spin_bug(raw_spinlock_t *lock, const char *msg)
{
struct task_struct *owner = NULL;
@@ -73,7 +73,7 @@ static void spin_bug(spinlock_t *lock, const char *msg)
#define SPIN_BUG_ON(cond, lock, msg) if (unlikely(cond)) spin_bug(lock, msg)
static inline void
debug_spin_lock_before(spinlock_t *lock)
debug_spin_lock_before(raw_spinlock_t *lock)
{
SPIN_BUG_ON(lock->magic != SPINLOCK_MAGIC, lock, "bad magic");
SPIN_BUG_ON(lock->owner == current, lock, "recursion");
@@ -81,16 +81,16 @@ debug_spin_lock_before(spinlock_t *lock)
lock, "cpu recursion");
}
static inline void debug_spin_lock_after(spinlock_t *lock)
static inline void debug_spin_lock_after(raw_spinlock_t *lock)
{
lock->owner_cpu = raw_smp_processor_id();
lock->owner = current;
}
static inline void debug_spin_unlock(spinlock_t *lock)
static inline void debug_spin_unlock(raw_spinlock_t *lock)
{
SPIN_BUG_ON(lock->magic != SPINLOCK_MAGIC, lock, "bad magic");
SPIN_BUG_ON(!spin_is_locked(lock), lock, "already unlocked");
SPIN_BUG_ON(!raw_spin_is_locked(lock), lock, "already unlocked");
SPIN_BUG_ON(lock->owner != current, lock, "wrong owner");
SPIN_BUG_ON(lock->owner_cpu != raw_smp_processor_id(),
lock, "wrong CPU");
@@ -98,7 +98,7 @@ static inline void debug_spin_unlock(spinlock_t *lock)
lock->owner_cpu = -1;
}
static void __spin_lock_debug(spinlock_t *lock)
static void __spin_lock_debug(raw_spinlock_t *lock)
{
u64 i;
u64 loops = loops_per_jiffy * HZ;
@@ -106,7 +106,7 @@ static void __spin_lock_debug(spinlock_t *lock)
for (;;) {
for (i = 0; i < loops; i++) {
if (__raw_spin_trylock(&lock->raw_lock))
if (arch_spin_trylock(&lock->raw_lock))
return;
__delay(1);
}
@@ -125,17 +125,17 @@ static void __spin_lock_debug(spinlock_t *lock)
}
}
void _raw_spin_lock(spinlock_t *lock)
void do_raw_spin_lock(raw_spinlock_t *lock)
{
debug_spin_lock_before(lock);
if (unlikely(!__raw_spin_trylock(&lock->raw_lock)))
if (unlikely(!arch_spin_trylock(&lock->raw_lock)))
__spin_lock_debug(lock);
debug_spin_lock_after(lock);
}
int _raw_spin_trylock(spinlock_t *lock)
int do_raw_spin_trylock(raw_spinlock_t *lock)
{
int ret = __raw_spin_trylock(&lock->raw_lock);
int ret = arch_spin_trylock(&lock->raw_lock);
if (ret)
debug_spin_lock_after(lock);
@@ -148,10 +148,10 @@ int _raw_spin_trylock(spinlock_t *lock)
return ret;
}
void _raw_spin_unlock(spinlock_t *lock)
void do_raw_spin_unlock(raw_spinlock_t *lock)
{
debug_spin_unlock(lock);
__raw_spin_unlock(&lock->raw_lock);
arch_spin_unlock(&lock->raw_lock);
}
static void rwlock_bug(rwlock_t *lock, const char *msg)
@@ -176,7 +176,7 @@ static void __read_lock_debug(rwlock_t *lock)
for (;;) {
for (i = 0; i < loops; i++) {
if (__raw_read_trylock(&lock->raw_lock))
if (arch_read_trylock(&lock->raw_lock))
return;
__delay(1);
}
@@ -193,15 +193,15 @@ static void __read_lock_debug(rwlock_t *lock)
}
#endif
void _raw_read_lock(rwlock_t *lock)
void do_raw_read_lock(rwlock_t *lock)
{
RWLOCK_BUG_ON(lock->magic != RWLOCK_MAGIC, lock, "bad magic");
__raw_read_lock(&lock->raw_lock);
arch_read_lock(&lock->raw_lock);
}
int _raw_read_trylock(rwlock_t *lock)
int do_raw_read_trylock(rwlock_t *lock)
{
int ret = __raw_read_trylock(&lock->raw_lock);
int ret = arch_read_trylock(&lock->raw_lock);
#ifndef CONFIG_SMP
/*
@@ -212,10 +212,10 @@ int _raw_read_trylock(rwlock_t *lock)
return ret;
}
void _raw_read_unlock(rwlock_t *lock)
void do_raw_read_unlock(rwlock_t *lock)
{
RWLOCK_BUG_ON(lock->magic != RWLOCK_MAGIC, lock, "bad magic");
__raw_read_unlock(&lock->raw_lock);
arch_read_unlock(&lock->raw_lock);
}
static inline void debug_write_lock_before(rwlock_t *lock)
@@ -251,7 +251,7 @@ static void __write_lock_debug(rwlock_t *lock)
for (;;) {
for (i = 0; i < loops; i++) {
if (__raw_write_trylock(&lock->raw_lock))
if (arch_write_trylock(&lock->raw_lock))
return;
__delay(1);
}
@@ -268,16 +268,16 @@ static void __write_lock_debug(rwlock_t *lock)
}
#endif
void _raw_write_lock(rwlock_t *lock)
void do_raw_write_lock(rwlock_t *lock)
{
debug_write_lock_before(lock);
__raw_write_lock(&lock->raw_lock);
arch_write_lock(&lock->raw_lock);
debug_write_lock_after(lock);
}
int _raw_write_trylock(rwlock_t *lock)
int do_raw_write_trylock(rwlock_t *lock)
{
int ret = __raw_write_trylock(&lock->raw_lock);
int ret = arch_write_trylock(&lock->raw_lock);
if (ret)
debug_write_lock_after(lock);
@@ -290,8 +290,8 @@ int _raw_write_trylock(rwlock_t *lock)
return ret;
}
void _raw_write_unlock(rwlock_t *lock)
void do_raw_write_unlock(rwlock_t *lock)
{
debug_write_unlock(lock);
__raw_write_unlock(&lock->raw_lock);
arch_write_unlock(&lock->raw_lock);
}