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/*
* Mutexes: blocking mutual exclusion locks
*
* started by Ingo Molnar:
*
* Copyright (C) 2004, 2005, 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com>
*
* This file contains mutex debugging related internal declarations,
* prototypes and inline functions, for the CONFIG_DEBUG_MUTEXES case.
* More details are in kernel/mutex-debug.c.
*/
/*
* This must be called with lock->wait_lock held.
*/
extern void debug_mutex_lock_common(struct mutex *lock,
struct mutex_waiter *waiter);
extern void debug_mutex_wake_waiter(struct mutex *lock,
struct mutex_waiter *waiter);
extern void debug_mutex_free_waiter(struct mutex_waiter *waiter);
extern void debug_mutex_add_waiter(struct mutex *lock,
struct mutex_waiter *waiter,
struct thread_info *ti);
extern void mutex_remove_waiter(struct mutex *lock, struct mutex_waiter *waiter,
struct thread_info *ti);
extern void debug_mutex_unlock(struct mutex *lock);
extern void debug_mutex_init(struct mutex *lock, const char *name,
struct lock_class_key *key);
static inline void mutex_set_owner(struct mutex *lock)
{
lock->owner = current;
}
static inline void mutex_clear_owner(struct mutex *lock)
{
lock->owner = NULL;
}
#include <linux/aee.h>
#define MT_DEBUG_LOCKS_WARN_ON(c) \
({ \
int __ret = 0; \
\
if (!oops_in_progress && unlikely(c)) { \
aee_kernel_warning(#c,"Mutex Debug\n");\
if (debug_locks_off() && !debug_locks_silent) \
WARN_ON(1); \
else \
dump_stack();\
__ret = 1; \
} \
__ret; \
})
#ifdef DEBUG_LOCKS_WARN_ON
#undef DEBUG_LOCKS_WARN_ON
#define DEBUG_LOCKS_WARN_ON(c) MT_DEBUG_LOCKS_WARN_ON(c)
#endif
#define spin_lock_mutex(lock, flags) \
do { \
struct mutex *l = container_of(lock, struct mutex, wait_lock); \
\
if(DEBUG_LOCKS_WARN_ON(in_interrupt())){ \
printk("[MUTEX WARN!!] mutex lock in interrupt context!\n");\
}\
local_irq_save(flags); \
arch_spin_lock(&(lock)->rlock.raw_lock);\
DEBUG_LOCKS_WARN_ON(l->magic != l); \
} while (0)
#define spin_unlock_mutex(lock, flags) \
do { \
arch_spin_unlock(&(lock)->rlock.raw_lock); \
local_irq_restore(flags); \
preempt_check_resched(); \
} while (0)
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