TononixOS/ubports_kernel_google_msm
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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

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* '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
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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;