mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-22 00:40:03 +00:00
91 lines
2.2 KiB
C
91 lines
2.2 KiB
C
![]() |
/* SPDX-License-Identifier: GPL-2.0 */
|
||
|
#ifndef _LINUX_LOCAL_LOCK_H
|
||
|
# error "Do not include directly, include linux/local_lock.h"
|
||
|
#endif
|
||
|
|
||
|
#include <linux/percpu-defs.h>
|
||
|
#include <linux/lockdep.h>
|
||
|
|
||
|
typedef struct {
|
||
|
#ifdef CONFIG_DEBUG_LOCK_ALLOC
|
||
|
struct lockdep_map dep_map;
|
||
|
struct task_struct *owner;
|
||
|
#endif
|
||
|
} local_lock_t;
|
||
|
|
||
|
#ifdef CONFIG_DEBUG_LOCK_ALLOC
|
||
|
# define LL_DEP_MAP_INIT(lockname) \
|
||
|
.dep_map = { \
|
||
|
.name = #lockname, \
|
||
|
.wait_type_inner = LD_WAIT_CONFIG, \
|
||
|
}
|
||
|
#else
|
||
|
# define LL_DEP_MAP_INIT(lockname)
|
||
|
#endif
|
||
|
|
||
|
#define INIT_LOCAL_LOCK(lockname) { LL_DEP_MAP_INIT(lockname) }
|
||
|
|
||
|
#define __local_lock_init(lock) \
|
||
|
do { \
|
||
|
static struct lock_class_key __key; \
|
||
|
\
|
||
|
debug_check_no_locks_freed((void *)lock, sizeof(*lock));\
|
||
|
lockdep_init_map_wait(&(lock)->dep_map, #lock, &__key, 0, LD_WAIT_CONFIG);\
|
||
|
} while (0)
|
||
|
|
||
|
#ifdef CONFIG_DEBUG_LOCK_ALLOC
|
||
|
static inline void local_lock_acquire(local_lock_t *l)
|
||
|
{
|
||
|
lock_map_acquire(&l->dep_map);
|
||
|
DEBUG_LOCKS_WARN_ON(l->owner);
|
||
|
l->owner = current;
|
||
|
}
|
||
|
|
||
|
static inline void local_lock_release(local_lock_t *l)
|
||
|
{
|
||
|
DEBUG_LOCKS_WARN_ON(l->owner != current);
|
||
|
l->owner = NULL;
|
||
|
lock_map_release(&l->dep_map);
|
||
|
}
|
||
|
|
||
|
#else /* CONFIG_DEBUG_LOCK_ALLOC */
|
||
|
static inline void local_lock_acquire(local_lock_t *l) { }
|
||
|
static inline void local_lock_release(local_lock_t *l) { }
|
||
|
#endif /* !CONFIG_DEBUG_LOCK_ALLOC */
|
||
|
|
||
|
#define __local_lock(lock) \
|
||
|
do { \
|
||
|
preempt_disable(); \
|
||
|
local_lock_acquire(this_cpu_ptr(lock)); \
|
||
|
} while (0)
|
||
|
|
||
|
#define __local_lock_irq(lock) \
|
||
|
do { \
|
||
|
local_irq_disable(); \
|
||
|
local_lock_acquire(this_cpu_ptr(lock)); \
|
||
|
} while (0)
|
||
|
|
||
|
#define __local_lock_irqsave(lock, flags) \
|
||
|
do { \
|
||
|
local_irq_save(flags); \
|
||
|
local_lock_acquire(this_cpu_ptr(lock)); \
|
||
|
} while (0)
|
||
|
|
||
|
#define __local_unlock(lock) \
|
||
|
do { \
|
||
|
local_lock_release(this_cpu_ptr(lock)); \
|
||
|
preempt_enable(); \
|
||
|
} while (0)
|
||
|
|
||
|
#define __local_unlock_irq(lock) \
|
||
|
do { \
|
||
|
local_lock_release(this_cpu_ptr(lock)); \
|
||
|
local_irq_enable(); \
|
||
|
} while (0)
|
||
|
|
||
|
#define __local_unlock_irqrestore(lock, flags) \
|
||
|
do { \
|
||
|
local_lock_release(this_cpu_ptr(lock)); \
|
||
|
local_irq_restore(flags); \
|
||
|
} while (0)
|