47,13 → 47,13 |
*/ |
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#include <linux/typecheck.h> |
//#include <linux/preempt.h> |
#include <linux/preempt.h> |
#include <linux/linkage.h> |
#include <linux/compiler.h> |
//#include <linux/thread_info.h> |
#include <linux/irqflags.h> |
#include <linux/kernel.h> |
#include <linux/stringify.h> |
//#include <linux/bottom_half.h> |
#include <linux/bottom_half.h> |
#include <asm/barrier.h> |
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89,234 → 89,322 |
#endif |
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#ifdef CONFIG_DEBUG_SPINLOCK |
extern void __spin_lock_init(spinlock_t *lock, const char *name, |
extern void __raw_spin_lock_init(raw_spinlock_t *lock, const char *name, |
struct lock_class_key *key); |
# define spin_lock_init(lock) \ |
# define raw_spin_lock_init(lock) \ |
do { \ |
static struct lock_class_key __key; \ |
\ |
__spin_lock_init((lock), #lock, &__key); \ |
__raw_spin_lock_init((lock), #lock, &__key); \ |
} while (0) |
|
#else |
# define spin_lock_init(lock) \ |
do { *(lock) = __SPIN_LOCK_UNLOCKED(lock); } while (0) |
# define raw_spin_lock_init(lock) \ |
do { *(lock) = __RAW_SPIN_LOCK_UNLOCKED(lock); } while (0) |
#endif |
|
#ifdef CONFIG_DEBUG_SPINLOCK |
extern void __rwlock_init(rwlock_t *lock, const char *name, |
struct lock_class_key *key); |
# define rwlock_init(lock) \ |
do { \ |
static struct lock_class_key __key; \ |
\ |
__rwlock_init((lock), #lock, &__key); \ |
} while (0) |
#else |
# define rwlock_init(lock) \ |
do { *(lock) = __RW_LOCK_UNLOCKED(lock); } while (0) |
#endif |
#define raw_spin_is_locked(lock) arch_spin_is_locked(&(lock)->raw_lock) |
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#define spin_is_locked(lock) __raw_spin_is_locked(&(lock)->raw_lock) |
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#ifdef CONFIG_GENERIC_LOCKBREAK |
#define spin_is_contended(lock) ((lock)->break_lock) |
#define raw_spin_is_contended(lock) ((lock)->break_lock) |
#else |
|
#ifdef __raw_spin_is_contended |
#define spin_is_contended(lock) __raw_spin_is_contended(&(lock)->raw_lock) |
#ifdef arch_spin_is_contended |
#define raw_spin_is_contended(lock) arch_spin_is_contended(&(lock)->raw_lock) |
#else |
#define spin_is_contended(lock) (((void)(lock), 0)) |
#endif /*__raw_spin_is_contended*/ |
#define raw_spin_is_contended(lock) (((void)(lock), 0)) |
#endif /*arch_spin_is_contended*/ |
#endif |
|
/* The lock does not imply full memory barrier. */ |
#ifndef ARCH_HAS_SMP_MB_AFTER_LOCK |
static inline void smp_mb__after_lock(void) { smp_mb(); } |
/* |
* Despite its name it doesn't necessarily has to be a full barrier. |
* It should only guarantee that a STORE before the critical section |
* can not be reordered with a LOAD inside this section. |
* spin_lock() is the one-way barrier, this LOAD can not escape out |
* of the region. So the default implementation simply ensures that |
* a STORE can not move into the critical section, smp_wmb() should |
* serialize it with another STORE done by spin_lock(). |
*/ |
#ifndef smp_mb__before_spinlock |
#define smp_mb__before_spinlock() smp_wmb() |
#endif |
|
/* |
* Place this after a lock-acquisition primitive to guarantee that |
* an UNLOCK+LOCK pair act as a full barrier. This guarantee applies |
* if the UNLOCK and LOCK are executed by the same CPU or if the |
* UNLOCK and LOCK operate on the same lock variable. |
*/ |
#ifndef smp_mb__after_unlock_lock |
#define smp_mb__after_unlock_lock() do { } while (0) |
#endif |
|
/** |
* spin_unlock_wait - wait until the spinlock gets unlocked |
* raw_spin_unlock_wait - wait until the spinlock gets unlocked |
* @lock: the spinlock in question. |
*/ |
#define spin_unlock_wait(lock) __raw_spin_unlock_wait(&(lock)->raw_lock) |
#define raw_spin_unlock_wait(lock) arch_spin_unlock_wait(&(lock)->raw_lock) |
|
#ifdef CONFIG_DEBUG_SPINLOCK |
extern void _raw_spin_lock(spinlock_t *lock); |
#define _raw_spin_lock_flags(lock, flags) _raw_spin_lock(lock) |
extern int _raw_spin_trylock(spinlock_t *lock); |
extern void _raw_spin_unlock(spinlock_t *lock); |
extern void _raw_read_lock(rwlock_t *lock); |
#define _raw_read_lock_flags(lock, flags) _raw_read_lock(lock) |
extern int _raw_read_trylock(rwlock_t *lock); |
extern void _raw_read_unlock(rwlock_t *lock); |
extern void _raw_write_lock(rwlock_t *lock); |
#define _raw_write_lock_flags(lock, flags) _raw_write_lock(lock) |
extern int _raw_write_trylock(rwlock_t *lock); |
extern void _raw_write_unlock(rwlock_t *lock); |
extern void do_raw_spin_lock(raw_spinlock_t *lock) __acquires(lock); |
#define do_raw_spin_lock_flags(lock, flags) do_raw_spin_lock(lock) |
extern int do_raw_spin_trylock(raw_spinlock_t *lock); |
extern void do_raw_spin_unlock(raw_spinlock_t *lock) __releases(lock); |
#else |
# define _raw_spin_lock(lock) __raw_spin_lock(&(lock)->raw_lock) |
# define _raw_spin_lock_flags(lock, flags) \ |
__raw_spin_lock_flags(&(lock)->raw_lock, *(flags)) |
# define _raw_spin_trylock(lock) __raw_spin_trylock(&(lock)->raw_lock) |
# define _raw_spin_unlock(lock) __raw_spin_unlock(&(lock)->raw_lock) |
# define _raw_read_lock(rwlock) __raw_read_lock(&(rwlock)->raw_lock) |
# define _raw_read_lock_flags(lock, flags) \ |
__raw_read_lock_flags(&(lock)->raw_lock, *(flags)) |
# define _raw_read_trylock(rwlock) __raw_read_trylock(&(rwlock)->raw_lock) |
# define _raw_read_unlock(rwlock) __raw_read_unlock(&(rwlock)->raw_lock) |
# define _raw_write_lock(rwlock) __raw_write_lock(&(rwlock)->raw_lock) |
# define _raw_write_lock_flags(lock, flags) \ |
__raw_write_lock_flags(&(lock)->raw_lock, *(flags)) |
# define _raw_write_trylock(rwlock) __raw_write_trylock(&(rwlock)->raw_lock) |
# define _raw_write_unlock(rwlock) __raw_write_unlock(&(rwlock)->raw_lock) |
static inline void do_raw_spin_lock(raw_spinlock_t *lock) __acquires(lock) |
{ |
__acquire(lock); |
arch_spin_lock(&lock->raw_lock); |
} |
|
static inline void |
do_raw_spin_lock_flags(raw_spinlock_t *lock, unsigned long *flags) __acquires(lock) |
{ |
__acquire(lock); |
arch_spin_lock_flags(&lock->raw_lock, *flags); |
} |
|
static inline int do_raw_spin_trylock(raw_spinlock_t *lock) |
{ |
return arch_spin_trylock(&(lock)->raw_lock); |
} |
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static inline void do_raw_spin_unlock(raw_spinlock_t *lock) __releases(lock) |
{ |
arch_spin_unlock(&lock->raw_lock); |
__release(lock); |
} |
#endif |
|
#define read_can_lock(rwlock) __raw_read_can_lock(&(rwlock)->raw_lock) |
#define write_can_lock(rwlock) __raw_write_can_lock(&(rwlock)->raw_lock) |
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/* |
* Define the various spin_lock and rw_lock methods. Note we define these |
* regardless of whether CONFIG_SMP or CONFIG_PREEMPT are set. The various |
* methods are defined as nops in the case they are not required. |
* Define the various spin_lock methods. Note we define these |
* regardless of whether CONFIG_SMP or CONFIG_PREEMPT are set. The |
* various methods are defined as nops in the case they are not |
* required. |
*/ |
#define spin_trylock(lock) __cond_lock(lock, _spin_trylock(lock)) |
#define read_trylock(lock) __cond_lock(lock, _read_trylock(lock)) |
#define write_trylock(lock) __cond_lock(lock, _write_trylock(lock)) |
#define raw_spin_trylock(lock) __cond_lock(lock, _raw_spin_trylock(lock)) |
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#define spin_lock(lock) _spin_lock(lock) |
#define raw_spin_lock(lock) _raw_spin_lock(lock) |
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#ifdef CONFIG_DEBUG_LOCK_ALLOC |
# define spin_lock_nested(lock, subclass) _spin_lock_nested(lock, subclass) |
# define spin_lock_nest_lock(lock, nest_lock) \ |
# define raw_spin_lock_nested(lock, subclass) \ |
_raw_spin_lock_nested(lock, subclass) |
|
# define raw_spin_lock_nest_lock(lock, nest_lock) \ |
do { \ |
typecheck(struct lockdep_map *, &(nest_lock)->dep_map);\ |
_spin_lock_nest_lock(lock, &(nest_lock)->dep_map); \ |
_raw_spin_lock_nest_lock(lock, &(nest_lock)->dep_map); \ |
} while (0) |
#else |
# define spin_lock_nested(lock, subclass) _spin_lock(lock) |
# define spin_lock_nest_lock(lock, nest_lock) _spin_lock(lock) |
/* |
* Always evaluate the 'subclass' argument to avoid that the compiler |
* warns about set-but-not-used variables when building with |
* CONFIG_DEBUG_LOCK_ALLOC=n and with W=1. |
*/ |
# define raw_spin_lock_nested(lock, subclass) \ |
_raw_spin_lock(((void)(subclass), (lock))) |
# define raw_spin_lock_nest_lock(lock, nest_lock) _raw_spin_lock(lock) |
#endif |
|
#define write_lock(lock) _write_lock(lock) |
#define read_lock(lock) _read_lock(lock) |
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#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK) |
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#define spin_lock_irqsave(lock, flags) \ |
#define raw_spin_lock_irqsave(lock, flags) \ |
do { \ |
typecheck(unsigned long, flags); \ |
flags = _spin_lock_irqsave(lock); \ |
flags = _raw_spin_lock_irqsave(lock); \ |
} while (0) |
#define read_lock_irqsave(lock, flags) \ |
do { \ |
typecheck(unsigned long, flags); \ |
flags = _read_lock_irqsave(lock); \ |
} while (0) |
#define write_lock_irqsave(lock, flags) \ |
do { \ |
typecheck(unsigned long, flags); \ |
flags = _write_lock_irqsave(lock); \ |
} while (0) |
|
#ifdef CONFIG_DEBUG_LOCK_ALLOC |
#define spin_lock_irqsave_nested(lock, flags, subclass) \ |
#define raw_spin_lock_irqsave_nested(lock, flags, subclass) \ |
do { \ |
typecheck(unsigned long, flags); \ |
flags = _spin_lock_irqsave_nested(lock, subclass); \ |
flags = _raw_spin_lock_irqsave_nested(lock, subclass); \ |
} while (0) |
#else |
#define spin_lock_irqsave_nested(lock, flags, subclass) \ |
#define raw_spin_lock_irqsave_nested(lock, flags, subclass) \ |
do { \ |
typecheck(unsigned long, flags); \ |
flags = _spin_lock_irqsave(lock); \ |
flags = _raw_spin_lock_irqsave(lock); \ |
} while (0) |
#endif |
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#else |
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#define spin_lock_irqsave(lock, flags) \ |
#define raw_spin_lock_irqsave(lock, flags) \ |
do { \ |
typecheck(unsigned long, flags); \ |
_spin_lock_irqsave(lock, flags); \ |
_raw_spin_lock_irqsave(lock, flags); \ |
} while (0) |
#define read_lock_irqsave(lock, flags) \ |
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#define raw_spin_lock_irqsave_nested(lock, flags, subclass) \ |
raw_spin_lock_irqsave(lock, flags) |
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#endif |
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#define raw_spin_lock_irq(lock) _raw_spin_lock_irq(lock) |
#define raw_spin_lock_bh(lock) _raw_spin_lock_bh(lock) |
#define raw_spin_unlock(lock) _raw_spin_unlock(lock) |
#define raw_spin_unlock_irq(lock) _raw_spin_unlock_irq(lock) |
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#define raw_spin_unlock_irqrestore(lock, flags) \ |
do { \ |
typecheck(unsigned long, flags); \ |
_read_lock_irqsave(lock, flags); \ |
_raw_spin_unlock_irqrestore(lock, flags); \ |
} while (0) |
#define write_lock_irqsave(lock, flags) \ |
#define raw_spin_unlock_bh(lock) _raw_spin_unlock_bh(lock) |
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#define raw_spin_trylock_bh(lock) \ |
__cond_lock(lock, _raw_spin_trylock_bh(lock)) |
|
#define raw_spin_trylock_irq(lock) \ |
({ \ |
local_irq_disable(); \ |
raw_spin_trylock(lock) ? \ |
1 : ({ local_irq_enable(); 0; }); \ |
}) |
|
#define raw_spin_trylock_irqsave(lock, flags) \ |
({ \ |
local_irq_save(flags); \ |
raw_spin_trylock(lock) ? \ |
1 : ({ local_irq_restore(flags); 0; }); \ |
}) |
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/** |
* raw_spin_can_lock - would raw_spin_trylock() succeed? |
* @lock: the spinlock in question. |
*/ |
#define raw_spin_can_lock(lock) (!raw_spin_is_locked(lock)) |
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/* Include rwlock functions */ |
#include <linux/rwlock.h> |
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/* |
* Pull the _spin_*()/_read_*()/_write_*() functions/declarations: |
*/ |
#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK) |
# include <linux/spinlock_api_smp.h> |
#else |
# include <linux/spinlock_api_up.h> |
#endif |
|
/* |
* Map the spin_lock functions to the raw variants for PREEMPT_RT=n |
*/ |
|
static inline raw_spinlock_t *spinlock_check(spinlock_t *lock) |
{ |
return &lock->rlock; |
} |
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#define spin_lock_init(_lock) \ |
do { \ |
typecheck(unsigned long, flags); \ |
_write_lock_irqsave(lock, flags); \ |
spinlock_check(_lock); \ |
raw_spin_lock_init(&(_lock)->rlock); \ |
} while (0) |
#define spin_lock_irqsave_nested(lock, flags, subclass) \ |
spin_lock_irqsave(lock, flags) |
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#endif |
static inline void spin_lock(spinlock_t *lock) |
{ |
raw_spin_lock(&lock->rlock); |
} |
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#define spin_lock_irq(lock) _spin_lock_irq(lock) |
#define spin_lock_bh(lock) _spin_lock_bh(lock) |
#define read_lock_irq(lock) _read_lock_irq(lock) |
#define read_lock_bh(lock) _read_lock_bh(lock) |
#define write_lock_irq(lock) _write_lock_irq(lock) |
#define write_lock_bh(lock) _write_lock_bh(lock) |
#define spin_unlock(lock) _spin_unlock(lock) |
#define read_unlock(lock) _read_unlock(lock) |
#define write_unlock(lock) _write_unlock(lock) |
#define spin_unlock_irq(lock) _spin_unlock_irq(lock) |
#define read_unlock_irq(lock) _read_unlock_irq(lock) |
#define write_unlock_irq(lock) _write_unlock_irq(lock) |
static inline void spin_lock_bh(spinlock_t *lock) |
{ |
raw_spin_lock_bh(&lock->rlock); |
} |
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#define spin_unlock_irqrestore(lock, flags) \ |
static inline int spin_trylock(spinlock_t *lock) |
{ |
return raw_spin_trylock(&lock->rlock); |
} |
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#define spin_lock_nested(lock, subclass) \ |
do { \ |
typecheck(unsigned long, flags); \ |
_spin_unlock_irqrestore(lock, flags); \ |
raw_spin_lock_nested(spinlock_check(lock), subclass); \ |
} while (0) |
#define spin_unlock_bh(lock) _spin_unlock_bh(lock) |
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#define read_unlock_irqrestore(lock, flags) \ |
#define spin_lock_nest_lock(lock, nest_lock) \ |
do { \ |
typecheck(unsigned long, flags); \ |
_read_unlock_irqrestore(lock, flags); \ |
raw_spin_lock_nest_lock(spinlock_check(lock), nest_lock); \ |
} while (0) |
#define read_unlock_bh(lock) _read_unlock_bh(lock) |
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#define write_unlock_irqrestore(lock, flags) \ |
static inline void spin_lock_irq(spinlock_t *lock) |
{ |
raw_spin_lock_irq(&lock->rlock); |
} |
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#define spin_lock_irqsave(lock, flags) \ |
do { \ |
typecheck(unsigned long, flags); \ |
_write_unlock_irqrestore(lock, flags); \ |
raw_spin_lock_irqsave(spinlock_check(lock), flags); \ |
} while (0) |
#define write_unlock_bh(lock) _write_unlock_bh(lock) |
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#define spin_trylock_bh(lock) __cond_lock(lock, _spin_trylock_bh(lock)) |
#define spin_lock_irqsave_nested(lock, flags, subclass) \ |
do { \ |
raw_spin_lock_irqsave_nested(spinlock_check(lock), flags, subclass); \ |
} while (0) |
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#define spin_trylock_irq(lock) \ |
({ \ |
local_irq_disable(); \ |
spin_trylock(lock) ? \ |
1 : ({ local_irq_enable(); 0; }); \ |
}) |
static inline void spin_unlock(spinlock_t *lock) |
{ |
raw_spin_unlock(&lock->rlock); |
} |
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static inline void spin_unlock_bh(spinlock_t *lock) |
{ |
raw_spin_unlock_bh(&lock->rlock); |
} |
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static inline void spin_unlock_irq(spinlock_t *lock) |
{ |
raw_spin_unlock_irq(&lock->rlock); |
} |
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static inline void spin_unlock_irqrestore(spinlock_t *lock, unsigned long flags) |
{ |
raw_spin_unlock_irqrestore(&lock->rlock, flags); |
} |
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static inline int spin_trylock_bh(spinlock_t *lock) |
{ |
return raw_spin_trylock_bh(&lock->rlock); |
} |
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static inline int spin_trylock_irq(spinlock_t *lock) |
{ |
return raw_spin_trylock_irq(&lock->rlock); |
} |
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#define spin_trylock_irqsave(lock, flags) \ |
({ \ |
local_irq_save(flags); \ |
spin_trylock(lock) ? \ |
1 : ({ local_irq_restore(flags); 0; }); \ |
raw_spin_trylock_irqsave(spinlock_check(lock), flags); \ |
}) |
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#define write_trylock_irqsave(lock, flags) \ |
({ \ |
local_irq_save(flags); \ |
write_trylock(lock) ? \ |
1 : ({ local_irq_restore(flags); 0; }); \ |
}) |
static inline void spin_unlock_wait(spinlock_t *lock) |
{ |
raw_spin_unlock_wait(&lock->rlock); |
} |
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static inline int spin_is_locked(spinlock_t *lock) |
{ |
return raw_spin_is_locked(&lock->rlock); |
} |
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static inline int spin_is_contended(spinlock_t *lock) |
{ |
return raw_spin_is_contended(&lock->rlock); |
} |
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static inline int spin_can_lock(spinlock_t *lock) |
{ |
return raw_spin_can_lock(&lock->rlock); |
} |
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#define assert_spin_locked(lock) assert_raw_spin_locked(&(lock)->rlock) |
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/* |
* Pull the atomic_t declaration: |
* (asm-mips/atomic.h needs above definitions) |
*/ |
#include <asm/atomic.h> |
#include <linux/atomic.h> |
/** |
* atomic_dec_and_lock - lock on reaching reference count zero |
* @atomic: the atomic counter |
329,25 → 417,4 |
#define atomic_dec_and_lock(atomic, lock) \ |
__cond_lock(lock, _atomic_dec_and_lock(atomic, lock)) |
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/** |
* spin_can_lock - would spin_trylock() succeed? |
* @lock: the spinlock in question. |
*/ |
#define spin_can_lock(lock) (!spin_is_locked(lock)) |
|
/* |
* Pull the _spin_*()/_read_*()/_write_*() functions/declarations: |
*/ |
#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK) |
# include <linux/spinlock_api_smp.h> |
#else |
# include <linux/spinlock_api_up.h> |
#endif |
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struct rw_semaphore { |
signed long count; |
spinlock_t wait_lock; |
struct list_head wait_list; |
}; |
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#endif /* __LINUX_SPINLOCK_H */ |