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 debug_mutex_lock_common(struct mutex *lock, |
| 17 | struct mutex_waiter *waiter); |
Ingo Molnar | 408894e | 2006-01-09 15:59:20 -0800 | [diff] [blame] | 18 | extern void debug_mutex_wake_waiter(struct mutex *lock, |
| 19 | struct mutex_waiter *waiter); |
| 20 | extern void debug_mutex_free_waiter(struct mutex_waiter *waiter); |
| 21 | extern void debug_mutex_add_waiter(struct mutex *lock, |
| 22 | struct mutex_waiter *waiter, |
Ingo Molnar | 9a11b49a | 2006-07-03 00:24:33 -0700 | [diff] [blame] | 23 | struct thread_info *ti); |
Ingo Molnar | 408894e | 2006-01-09 15:59:20 -0800 | [diff] [blame] | 24 | extern void mutex_remove_waiter(struct mutex *lock, struct mutex_waiter *waiter, |
| 25 | struct thread_info *ti); |
| 26 | extern void debug_mutex_unlock(struct mutex *lock); |
Ingo Molnar | 9a11b49a | 2006-07-03 00:24:33 -0700 | [diff] [blame] | 27 | extern void debug_mutex_init(struct mutex *lock, const char *name, |
| 28 | struct lock_class_key *key); |
Ingo Molnar | 408894e | 2006-01-09 15:59:20 -0800 | [diff] [blame] | 29 | |
Peter Zijlstra | 0d66bf6 | 2009-01-12 14:01:47 +0100 | [diff] [blame] | 30 | static inline void mutex_set_owner(struct mutex *lock) |
| 31 | { |
| 32 | lock->owner = current_thread_info(); |
| 33 | } |
| 34 | |
| 35 | static inline void mutex_clear_owner(struct mutex *lock) |
| 36 | { |
| 37 | lock->owner = NULL; |
| 38 | } |
| 39 | |
Ingo Molnar | 1fb00c6 | 2006-06-26 00:24:31 -0700 | [diff] [blame] | 40 | #define spin_lock_mutex(lock, flags) \ |
Ingo Molnar | 408894e | 2006-01-09 15:59:20 -0800 | [diff] [blame] | 41 | do { \ |
| 42 | struct mutex *l = container_of(lock, struct mutex, wait_lock); \ |
| 43 | \ |
Ingo Molnar | 9e7f4d4 | 2006-07-03 00:24:30 -0700 | [diff] [blame] | 44 | DEBUG_LOCKS_WARN_ON(in_interrupt()); \ |
Ingo Molnar | 9a11b49a | 2006-07-03 00:24:33 -0700 | [diff] [blame] | 45 | local_irq_save(flags); \ |
| 46 | __raw_spin_lock(&(lock)->raw_lock); \ |
Ingo Molnar | 9e7f4d4 | 2006-07-03 00:24:30 -0700 | [diff] [blame] | 47 | DEBUG_LOCKS_WARN_ON(l->magic != l); \ |
Ingo Molnar | 408894e | 2006-01-09 15:59:20 -0800 | [diff] [blame] | 48 | } while (0) |
| 49 | |
Ingo Molnar | 1fb00c6 | 2006-06-26 00:24:31 -0700 | [diff] [blame] | 50 | #define spin_unlock_mutex(lock, flags) \ |
Ingo Molnar | 408894e | 2006-01-09 15:59:20 -0800 | [diff] [blame] | 51 | do { \ |
Ingo Molnar | 9a11b49a | 2006-07-03 00:24:33 -0700 | [diff] [blame] | 52 | __raw_spin_unlock(&(lock)->raw_lock); \ |
| 53 | local_irq_restore(flags); \ |
| 54 | preempt_check_resched(); \ |
Ingo Molnar | 408894e | 2006-01-09 15:59:20 -0800 | [diff] [blame] | 55 | } while (0) |