mirror of https://gitee.com/openkylin/linux.git
56 lines
1.7 KiB
C
56 lines
1.7 KiB
C
/*
|
|
* 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 task_struct *task);
|
|
extern void mutex_remove_waiter(struct mutex *lock, struct mutex_waiter *waiter,
|
|
struct task_struct *task);
|
|
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)
|
|
{
|
|
WRITE_ONCE(lock->owner, current);
|
|
}
|
|
|
|
static inline void mutex_clear_owner(struct mutex *lock)
|
|
{
|
|
WRITE_ONCE(lock->owner, NULL);
|
|
}
|
|
|
|
#define spin_lock_mutex(lock, flags) \
|
|
do { \
|
|
struct mutex *l = container_of(lock, struct mutex, wait_lock); \
|
|
\
|
|
DEBUG_LOCKS_WARN_ON(in_interrupt()); \
|
|
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)
|