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/* 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, \
.lock_type = LD_LOCK_PERCPU, \
}
#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_type(&(lock)->dep_map, #lock, &__key, 0, \
LD_WAIT_CONFIG, LD_WAIT_INV, \
LD_LOCK_PERCPU); \
} 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)
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