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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 

* 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  lockdep: Check the depth of subclass
  lockdep: Add improved subclass caching
  affs: Use sema_init instead of init_MUTEX
  hfs: Convert tree_lock to mutex
  arm: Bcmring: semaphore cleanup
  printk: Make console_sem a semaphore not a pseudo mutex
  drivers/macintosh/adb: Do not claim that the semaphore is a mutex
  parport: Semaphore cleanup
  irda: Semaphore cleanup
  net: Wan/cosa.c: Convert "mutex" to semaphore
  net: Ppp_async: semaphore cleanup
  hamradio: Mkiss: semaphore cleanup
  hamradio: 6pack: semaphore cleanup
  net: 3c527: semaphore cleanup
  input: Serio/hp_sdc: semaphore cleanup
  input: Serio/hil_mlc: semaphore cleanup
  input: Misc/hp_sdc_rtc: semaphore cleanup
  lockup_detector: Make callback function static
  lockup detector: Fix grammar by adding a missing "to" in the comments
  lockdep: Remove __debug_show_held_locks
This commit is contained in:
Linus Torvalds 2010-10-21 12:49:31 -07:00
parent 1053e6bba0 4ba053c04a
commit 31b7eab27a
22 changed files with 69 additions and 56 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/arm/mach-bcmring/dma.c
View File

@ -691,7 +691,7 @@ int dma_init(void)
memset(&gDMA, 0, sizeof(gDMA));
init_MUTEX_LOCKED(&gDMA.lock);
sema_init(&gDMA.lock, 0);
init_waitqueue_head(&gDMA.freeChannelQ);
/* Initialize the Hardware */
@ -1574,7 +1574,7 @@ int dma_init_mem_map(DMA_MemMap_t *memMap)
{
memset(memMap, 0, sizeof(*memMap));
init_MUTEX(&memMap->lock);
sema_init(&memMap->lock, 1);
return 0;
}

4
drivers/input/misc/hp_sdc_rtc.c
View File

@ -104,7 +104,7 @@ static int hp_sdc_rtc_do_read_bbrtc (struct rtc_time *rtctm)
t.endidx = 91;
t.seq = tseq;
t.act.semaphore = &tsem;
init_MUTEX_LOCKED(&tsem);
sema_init(&tsem, 0);
if (hp_sdc_enqueue_transaction(&t)) return -1;
@ -698,7 +698,7 @@ static int __init hp_sdc_rtc_init(void)
return -ENODEV;
#endif
init_MUTEX(&i8042tregs);
sema_init(&i8042tregs, 1);
if ((ret = hp_sdc_request_timer_irq(&hp_sdc_rtc_isr)))
return ret;

6
drivers/input/serio/hil_mlc.c
View File

@ -915,15 +915,15 @@ int hil_mlc_register(hil_mlc *mlc)
mlc->ostarted = 0;
rwlock_init(&mlc->lock);
init_MUTEX(&mlc->osem);
sema_init(&mlc->osem, 1);
init_MUTEX(&mlc->isem);
sema_init(&mlc->isem, 1);
mlc->icount = -1;
mlc->imatch = 0;
mlc->opercnt = 0;
init_MUTEX_LOCKED(&(mlc->csem));
sema_init(&(mlc->csem), 0);
hil_mlc_clear_di_scratch(mlc);
hil_mlc_clear_di_map(mlc, 0);

4
drivers/input/serio/hp_sdc.c
View File

@ -905,7 +905,7 @@ static int __init hp_sdc_init(void)
ts_sync[1] = 0x0f;
ts_sync[2] = ts_sync[3] = ts_sync[4] = ts_sync[5] = 0;
t_sync.act.semaphore = &s_sync;
init_MUTEX_LOCKED(&s_sync);
sema_init(&s_sync, 0);
hp_sdc_enqueue_transaction(&t_sync);
down(&s_sync); /* Wait for t_sync to complete */
@ -1039,7 +1039,7 @@ static int __init hp_sdc_register(void)
return hp_sdc.dev_err;
}
init_MUTEX_LOCKED(&tq_init_sem);
sema_init(&tq_init_sem, 0);
tq_init.actidx = 0;
tq_init.idx = 1;

2
drivers/macintosh/adb.c
View File

@ -83,7 +83,7 @@ static struct adb_driver *adb_controller;
BLOCKING_NOTIFIER_HEAD(adb_client_list);
static int adb_got_sleep;
static int adb_inited;
static DECLARE_MUTEX(adb_probe_mutex);
static DEFINE_SEMAPHORE(adb_probe_mutex);
static int sleepy_trackpad;
static int autopoll_devs;
int __adb_probe_sync;

2
drivers/net/3c527.c
View File

@ -522,7 +522,7 @@ static int __init mc32_probe1(struct net_device *dev, int slot)
lp->tx_len = lp->exec_box->data[9]; /* Transmit list count */
lp->rx_len = lp->exec_box->data[11]; /* Receive list count */
init_MUTEX_LOCKED(&lp->cmd_mutex);
sema_init(&lp->cmd_mutex, 0);
init_completion(&lp->execution_cmd);
init_completion(&lp->xceiver_cmd);

2
drivers/net/hamradio/6pack.c
View File

@ -608,7 +608,7 @@ static int sixpack_open(struct tty_struct *tty)
spin_lock_init(&sp->lock);
atomic_set(&sp->refcnt, 1);
init_MUTEX_LOCKED(&sp->dead_sem);
sema_init(&sp->dead_sem, 0);
/* !!! length of the buffers. MTU is IP MTU, not PACLEN! */

2
drivers/net/hamradio/mkiss.c
View File

@ -747,7 +747,7 @@ static int mkiss_open(struct tty_struct *tty)
spin_lock_init(&ax->buflock);
atomic_set(&ax->refcnt, 1);
init_MUTEX_LOCKED(&ax->dead_sem);
sema_init(&ax->dead_sem, 0);
ax->tty = tty;
tty->disc_data = ax;

2
drivers/net/irda/sir_dev.c
View File

@ -909,7 +909,7 @@ struct sir_dev * sirdev_get_instance(const struct sir_driver *drv, const char *n
dev->tx_skb = NULL;
spin_lock_init(&dev->tx_lock);
init_MUTEX(&dev->fsm.sem);
sema_init(&dev->fsm.sem, 1);
dev->drv = drv;
dev->netdev = ndev;

2
drivers/net/ppp_async.c
View File

@ -184,7 +184,7 @@ ppp_asynctty_open(struct tty_struct *tty)
tasklet_init(&ap->tsk, ppp_async_process, (unsigned long) ap);
atomic_set(&ap->refcnt, 1);
init_MUTEX_LOCKED(&ap->dead_sem);
sema_init(&ap->dead_sem, 0);
ap->chan.private = ap;
ap->chan.ops = &async_ops;

2
drivers/net/wan/cosa.c
View File

@ -575,7 +575,7 @@ static int cosa_probe(int base, int irq, int dma)
/* Initialize the chardev data structures */
mutex_init(&chan->rlock);
init_MUTEX(&chan->wsem);
sema_init(&chan->wsem, 1);
/* Register the network interface */
if (!(chan->netdev = alloc_hdlcdev(chan))) {

2
drivers/parport/share.c
View File

@ -306,7 +306,7 @@ struct parport *parport_register_port(unsigned long base, int irq, int dma,
spin_lock_init(&tmp->pardevice_lock);
tmp->ieee1284.mode = IEEE1284_MODE_COMPAT;
tmp->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
init_MUTEX_LOCKED (&tmp->ieee1284.irq); /* actually a semaphore at 0 */
sema_init(&tmp->ieee1284.irq, 0);
tmp->spintime = parport_default_spintime;
atomic_set (&tmp->ref_count, 1);
INIT_LIST_HEAD(&tmp->full_list);

4
fs/affs/super.c
View File

@ -109,8 +109,8 @@ static void init_once(void *foo)
{
struct affs_inode_info *ei = (struct affs_inode_info *) foo;
init_MUTEX(&ei->i_link_lock);
init_MUTEX(&ei->i_ext_lock);
sema_init(&ei->i_link_lock, 1);
sema_init(&ei->i_ext_lock, 1);
inode_init_once(&ei->vfs_inode);
}

4
fs/hfs/bfind.c
View File

@ -23,7 +23,7 @@ int hfs_find_init(struct hfs_btree *tree, struct hfs_find_data *fd)
fd->search_key = ptr;
fd->key = ptr + tree->max_key_len + 2;
dprint(DBG_BNODE_REFS, "find_init: %d (%p)\n", tree->cnid, __builtin_return_address(0));
down(&tree->tree_lock);
mutex_lock(&tree->tree_lock);
return 0;
}
@ -32,7 +32,7 @@ void hfs_find_exit(struct hfs_find_data *fd)
hfs_bnode_put(fd->bnode);
kfree(fd->search_key);
dprint(DBG_BNODE_REFS, "find_exit: %d (%p)\n", fd->tree->cnid, __builtin_return_address(0));
up(&fd->tree->tree_lock);
mutex_unlock(&fd->tree->tree_lock);
fd->tree = NULL;
}

2
fs/hfs/btree.c
View File

@ -27,7 +27,7 @@ struct hfs_btree *hfs_btree_open(struct super_block *sb, u32 id, btree_keycmp ke
if (!tree)
return NULL;
init_MUTEX(&tree->tree_lock);
mutex_init(&tree->tree_lock);
spin_lock_init(&tree->hash_lock);
/* Set the correct compare function */
tree->sb = sb;

2
fs/hfs/btree.h
View File

@ -33,7 +33,7 @@ struct hfs_btree {
unsigned int depth;
//unsigned int map1_size, map_size;
struct semaphore tree_lock;
struct mutex tree_lock;
unsigned int pages_per_bnode;
spinlock_t hash_lock;

5
include/linux/debug_locks.h
View File

@ -49,7 +49,6 @@ struct task_struct;
#ifdef CONFIG_LOCKDEP
extern void debug_show_all_locks(void);
extern void __debug_show_held_locks(struct task_struct *task);
extern void debug_show_held_locks(struct task_struct *task);
extern void debug_check_no_locks_freed(const void *from, unsigned long len);
extern void debug_check_no_locks_held(struct task_struct *task);
@ -58,10 +57,6 @@ static inline void debug_show_all_locks(void)
{
}
static inline void __debug_show_held_locks(struct task_struct *task)
{
}
static inline void debug_show_held_locks(struct task_struct *task)
{
}

13
include/linux/lockdep.h
View File

@ -31,6 +31,17 @@ extern int lock_stat;
#define MAX_LOCKDEP_SUBCLASSES 8UL
/*
* NR_LOCKDEP_CACHING_CLASSES ... Number of classes
* cached in the instance of lockdep_map
*
* Currently main class (subclass == 0) and signle depth subclass
* are cached in lockdep_map. This optimization is mainly targeting
* on rq->lock. double_rq_lock() acquires this highly competitive with
* single depth.
*/
#define NR_LOCKDEP_CACHING_CLASSES 2
/*
* Lock-classes are keyed via unique addresses, by embedding the
* lockclass-key into the kernel (or module) .data section. (For
@ -138,7 +149,7 @@ void clear_lock_stats(struct lock_class *class);
*/
struct lockdep_map {
struct lock_class_key *key;
struct lock_class *class_cache;
struct lock_class *class_cache[NR_LOCKDEP_CACHING_CLASSES];
const char *name;
#ifdef CONFIG_LOCK_STAT
int cpu;

4
kernel/hung_task.c
View File

@ -98,7 +98,7 @@ static void check_hung_task(struct task_struct *t, unsigned long timeout)
printk(KERN_ERR "\"echo 0 > /proc/sys/kernel/hung_task_timeout_secs\""
" disables this message.\n");
sched_show_task(t);
__debug_show_held_locks(t);
debug_show_held_locks(t);
touch_nmi_watchdog();
@ -111,7 +111,7 @@ static void check_hung_task(struct task_struct *t, unsigned long timeout)
* periodically exit the critical section and enter a new one.
*
* For preemptible RCU it is sufficient to call rcu_read_unlock in order
* exit the grace period. For classic RCU, a reschedule is required.
* to exit the grace period. For classic RCU, a reschedule is required.
*/
static void rcu_lock_break(struct task_struct *g, struct task_struct *t)
{

51
kernel/lockdep.c
View File

@ -639,6 +639,16 @@ look_up_lock_class(struct lockdep_map *lock, unsigned int subclass)
}
#endif
if (unlikely(subclass >= MAX_LOCKDEP_SUBCLASSES)) {
debug_locks_off();
printk(KERN_ERR
"BUG: looking up invalid subclass: %u\n", subclass);
printk(KERN_ERR
"turning off the locking correctness validator.\n");
dump_stack();
return NULL;
}
/*
* Static locks do not have their class-keys yet - for them the key
* is the lock object itself:
@ -774,7 +784,9 @@ out_unlock_set:
raw_local_irq_restore(flags);
if (!subclass || force)
lock->class_cache = class;
lock->class_cache[0] = class;
else if (subclass < NR_LOCKDEP_CACHING_CLASSES)
lock->class_cache[subclass] = class;
if (DEBUG_LOCKS_WARN_ON(class->subclass != subclass))
return NULL;
@ -2679,7 +2691,11 @@ static int mark_lock(struct task_struct *curr, struct held_lock *this,
void lockdep_init_map(struct lockdep_map *lock, const char *name,
struct lock_class_key *key, int subclass)
{
lock->class_cache = NULL;
int i;
for (i = 0; i < NR_LOCKDEP_CACHING_CLASSES; i++)
lock->class_cache[i] = NULL;
#ifdef CONFIG_LOCK_STAT
lock->cpu = raw_smp_processor_id();
#endif
@ -2739,21 +2755,13 @@ static int __lock_acquire(struct lockdep_map *lock, unsigned int subclass,
if (DEBUG_LOCKS_WARN_ON(!irqs_disabled()))
return 0;
if (unlikely(subclass >= MAX_LOCKDEP_SUBCLASSES)) {
debug_locks_off();
printk("BUG: MAX_LOCKDEP_SUBCLASSES too low!\n");
printk("turning off the locking correctness validator.\n");
dump_stack();
return 0;
}
if (lock->key == &__lockdep_no_validate__)
check = 1;
if (!subclass)
class = lock->class_cache;
if (subclass < NR_LOCKDEP_CACHING_CLASSES)
class = lock->class_cache[subclass];
/*
* Not cached yet or subclass?
* Not cached?
*/
if (unlikely(!class)) {
class = register_lock_class(lock, subclass, 0);
@ -2918,7 +2926,7 @@ static int match_held_lock(struct held_lock *hlock, struct lockdep_map *lock)
return 1;
if (hlock->references) {
struct lock_class *class = lock->class_cache;
struct lock_class *class = lock->class_cache[0];
if (!class)
class = look_up_lock_class(lock, 0);
@ -3559,7 +3567,12 @@ void lockdep_reset_lock(struct lockdep_map *lock)
if (list_empty(head))
continue;
list_for_each_entry_safe(class, next, head, hash_entry) {
if (unlikely(class == lock->class_cache)) {
int match = 0;
for (j = 0; j < NR_LOCKDEP_CACHING_CLASSES; j++)
match |= class == lock->class_cache[j];
if (unlikely(match)) {
if (debug_locks_off_graph_unlock())
WARN_ON(1);
goto out_restore;
@ -3775,7 +3788,7 @@ EXPORT_SYMBOL_GPL(debug_show_all_locks);
* Careful: only use this function if you are sure that
* the task cannot run in parallel!
*/
void __debug_show_held_locks(struct task_struct *task)
void debug_show_held_locks(struct task_struct *task)
{
if (unlikely(!debug_locks)) {
printk("INFO: lockdep is turned off.\n");
@ -3783,12 +3796,6 @@ void __debug_show_held_locks(struct task_struct *task)
}
lockdep_print_held_locks(task);
}
EXPORT_SYMBOL_GPL(__debug_show_held_locks);
void debug_show_held_locks(struct task_struct *task)
{
__debug_show_held_locks(task);
}
EXPORT_SYMBOL_GPL(debug_show_held_locks);
void lockdep_sys_exit(void)

4
kernel/printk.c
View File

@ -85,7 +85,7 @@ EXPORT_SYMBOL(oops_in_progress);
* provides serialisation for access to the entire console
* driver system.
*/
static DECLARE_MUTEX(console_sem);
static DEFINE_SEMAPHORE(console_sem);
struct console *console_drivers;
EXPORT_SYMBOL_GPL(console_drivers);
@ -556,7 +556,7 @@ static void zap_locks(void)
/* If a crash is occurring, make sure we can't deadlock */
spin_lock_init(&logbuf_lock);
/* And make sure that we print immediately */
init_MUTEX(&console_sem);
sema_init(&console_sem, 1);
}
#if defined(CONFIG_PRINTK_TIME)

2
kernel/watchdog.c
View File

@ -209,7 +209,7 @@ static struct perf_event_attr wd_hw_attr = {
};
/* Callback function for perf event subsystem */
void watchdog_overflow_callback(struct perf_event *event, int nmi,
static void watchdog_overflow_callback(struct perf_event *event, int nmi,
struct perf_sample_data *data,
struct pt_regs *regs)
{