Ingo Molnar | 408894e | 2006-01-09 15:59:20 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Mutexes: blocking mutual exclusion locks |
| 3 | * |
| 4 | * started by Ingo Molnar: |
| 5 | * |
| 6 | * Copyright (C) 2004, 2005, 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com> |
| 7 | * |
| 8 | * This file contains mutex debugging related internal declarations, |
| 9 | * prototypes and inline functions, for the CONFIG_DEBUG_MUTEXES case. |
| 10 | * More details are in kernel/mutex-debug.c. |
| 11 | */ |
| 12 | |
Ingo Molnar | 408894e | 2006-01-09 15:59:20 -0800 | [diff] [blame] | 13 | /* |
| 14 | * This must be called with lock->wait_lock held. |
| 15 | */ |
Ingo Molnar | 9a11b49a | 2006-07-03 00:24:33 -0700 | [diff] [blame] | 16 | extern void |
| 17 | debug_mutex_set_owner(struct mutex *lock, struct thread_info *new_owner); |
Ingo Molnar | 408894e | 2006-01-09 15:59:20 -0800 | [diff] [blame] | 18 | |
| 19 | static inline void debug_mutex_clear_owner(struct mutex *lock) |
| 20 | { |
| 21 | lock->owner = NULL; |
| 22 | } |
| 23 | |
Ingo Molnar | 9a11b49a | 2006-07-03 00:24:33 -0700 | [diff] [blame] | 24 | extern void debug_mutex_lock_common(struct mutex *lock, |
| 25 | struct mutex_waiter *waiter); |
Ingo Molnar | 408894e | 2006-01-09 15:59:20 -0800 | [diff] [blame] | 26 | extern void debug_mutex_wake_waiter(struct mutex *lock, |
| 27 | struct mutex_waiter *waiter); |
| 28 | extern void debug_mutex_free_waiter(struct mutex_waiter *waiter); |
| 29 | extern void debug_mutex_add_waiter(struct mutex *lock, |
| 30 | struct mutex_waiter *waiter, |
Ingo Molnar | 9a11b49a | 2006-07-03 00:24:33 -0700 | [diff] [blame] | 31 | struct thread_info *ti); |
Ingo Molnar | 408894e | 2006-01-09 15:59:20 -0800 | [diff] [blame] | 32 | extern void mutex_remove_waiter(struct mutex *lock, struct mutex_waiter *waiter, |
| 33 | struct thread_info *ti); |
| 34 | extern void debug_mutex_unlock(struct mutex *lock); |
Ingo Molnar | 9a11b49a | 2006-07-03 00:24:33 -0700 | [diff] [blame] | 35 | extern void debug_mutex_init(struct mutex *lock, const char *name, |
| 36 | struct lock_class_key *key); |
Ingo Molnar | 408894e | 2006-01-09 15:59:20 -0800 | [diff] [blame] | 37 | |
Ingo Molnar | 1fb00c6 | 2006-06-26 00:24:31 -0700 | [diff] [blame] | 38 | #define spin_lock_mutex(lock, flags) \ |
Ingo Molnar | 408894e | 2006-01-09 15:59:20 -0800 | [diff] [blame] | 39 | do { \ |
| 40 | struct mutex *l = container_of(lock, struct mutex, wait_lock); \ |
| 41 | \ |
Ingo Molnar | 9e7f4d4 | 2006-07-03 00:24:30 -0700 | [diff] [blame] | 42 | DEBUG_LOCKS_WARN_ON(in_interrupt()); \ |
Ingo Molnar | 9a11b49a | 2006-07-03 00:24:33 -0700 | [diff] [blame] | 43 | local_irq_save(flags); \ |
| 44 | __raw_spin_lock(&(lock)->raw_lock); \ |
Ingo Molnar | 9e7f4d4 | 2006-07-03 00:24:30 -0700 | [diff] [blame] | 45 | DEBUG_LOCKS_WARN_ON(l->magic != l); \ |
Ingo Molnar | 408894e | 2006-01-09 15:59:20 -0800 | [diff] [blame] | 46 | } while (0) |
| 47 | |
Ingo Molnar | 1fb00c6 | 2006-06-26 00:24:31 -0700 | [diff] [blame] | 48 | #define spin_unlock_mutex(lock, flags) \ |
Ingo Molnar | 408894e | 2006-01-09 15:59:20 -0800 | [diff] [blame] | 49 | do { \ |
Ingo Molnar | 9a11b49a | 2006-07-03 00:24:33 -0700 | [diff] [blame] | 50 | __raw_spin_unlock(&(lock)->raw_lock); \ |
| 51 | local_irq_restore(flags); \ |
| 52 | preempt_check_resched(); \ |
Ingo Molnar | 408894e | 2006-01-09 15:59:20 -0800 | [diff] [blame] | 53 | } while (0) |