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408894ee IM |
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 | ||
408894ee IM |
13 | /* |
14 | * This must be called with lock->wait_lock held. | |
15 | */ | |
9a11b49a IM |
16 | extern void debug_mutex_lock_common(struct mutex *lock, |
17 | struct mutex_waiter *waiter); | |
408894ee IM |
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, | |
9a11b49a | 23 | struct thread_info *ti); |
408894ee IM |
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); | |
9a11b49a IM |
27 | extern void debug_mutex_init(struct mutex *lock, const char *name, |
28 | struct lock_class_key *key); | |
408894ee | 29 | |
0d66bf6d PZ |
30 | static inline void mutex_set_owner(struct mutex *lock) |
31 | { | |
c6eb3dda | 32 | lock->owner = current; |
0d66bf6d PZ |
33 | } |
34 | ||
35 | static inline void mutex_clear_owner(struct mutex *lock) | |
36 | { | |
37 | lock->owner = NULL; | |
38 | } | |
6fa3eb70 S |
39 | #include <linux/aee.h> |
40 | #define MT_DEBUG_LOCKS_WARN_ON(c) \ | |
41 | ({ \ | |
42 | int __ret = 0; \ | |
43 | \ | |
44 | if (!oops_in_progress && unlikely(c)) { \ | |
45 | aee_kernel_warning(#c,"Mutex Debug\n");\ | |
46 | if (debug_locks_off() && !debug_locks_silent) \ | |
47 | WARN_ON(1); \ | |
48 | else \ | |
49 | dump_stack();\ | |
50 | __ret = 1; \ | |
51 | } \ | |
52 | __ret; \ | |
53 | }) | |
54 | ||
55 | #ifdef DEBUG_LOCKS_WARN_ON | |
56 | #undef DEBUG_LOCKS_WARN_ON | |
57 | #define DEBUG_LOCKS_WARN_ON(c) MT_DEBUG_LOCKS_WARN_ON(c) | |
58 | #endif | |
0d66bf6d | 59 | |
1fb00c6c | 60 | #define spin_lock_mutex(lock, flags) \ |
408894ee IM |
61 | do { \ |
62 | struct mutex *l = container_of(lock, struct mutex, wait_lock); \ | |
63 | \ | |
6fa3eb70 S |
64 | if(DEBUG_LOCKS_WARN_ON(in_interrupt())){ \ |
65 | printk("[MUTEX WARN!!] mutex lock in interrupt context!\n");\ | |
66 | }\ | |
9a11b49a | 67 | local_irq_save(flags); \ |
c2f21ce2 | 68 | arch_spin_lock(&(lock)->rlock.raw_lock);\ |
9e7f4d45 | 69 | DEBUG_LOCKS_WARN_ON(l->magic != l); \ |
408894ee IM |
70 | } while (0) |
71 | ||
c2f21ce2 TG |
72 | #define spin_unlock_mutex(lock, flags) \ |
73 | do { \ | |
74 | arch_spin_unlock(&(lock)->rlock.raw_lock); \ | |
75 | local_irq_restore(flags); \ | |
76 | preempt_check_resched(); \ | |
408894ee | 77 | } while (0) |