+++ /dev/null
-#ifndef __LINUX_SPINLOCK_H
-#define __LINUX_SPINLOCK_H
-
-/*
- * include/linux/spinlock.h - generic spinlock/rwlock declarations
- *
- * here's the role of the various spinlock/rwlock related include files:
- *
- * on SMP builds:
- *
- * asm/spinlock_types.h: contains the raw_spinlock_t/raw_rwlock_t and the
- * initializers
- *
- * linux/spinlock_types.h:
- * defines the generic type and initializers
- *
- * asm/spinlock.h: contains the __raw_spin_*()/etc. lowlevel
- * implementations, mostly inline assembly code
- *
- * (also included on UP-debug builds:)
- *
- * linux/spinlock_api_smp.h:
- * contains the prototypes for the _spin_*() APIs.
- *
- * linux/spinlock.h: builds the final spin_*() APIs.
- *
- * on UP builds:
- *
- * linux/spinlock_type_up.h:
- * contains the generic, simplified UP spinlock type.
- * (which is an empty structure on non-debug builds)
- *
- * linux/spinlock_types.h:
- * defines the generic type and initializers
- *
- * linux/spinlock_up.h:
- * contains the __raw_spin_*()/etc. version of UP
- * builds. (which are NOPs on non-debug, non-preempt
- * builds)
- *
- * (included on UP-non-debug builds:)
- *
- * linux/spinlock_api_up.h:
- * builds the _spin_*() APIs.
- *
- * linux/spinlock.h: builds the final spin_*() APIs.
- */
-
-#include <linux/typecheck.h>
-#include <linux/preempt.h>
-#include <linux/linkage.h>
-#include <linux/compiler.h>
-#include <linux/thread_info.h>
-#include <linux/kernel.h>
-#include <linux/stringify.h>
-#include <linux/bottom_half.h>
-
-#include <asm/system.h>
-
-/*
- * Must define these before including other files, inline functions need them
- */
-#define LOCK_SECTION_NAME ".text.lock."KBUILD_BASENAME
-
-#define LOCK_SECTION_START(extra) \
- ".subsection 1\n\t" \
- extra \
- ".ifndef " LOCK_SECTION_NAME "\n\t" \
- LOCK_SECTION_NAME ":\n\t" \
- ".endif\n"
-
-#define LOCK_SECTION_END \
- ".previous\n\t"
-
-#define __lockfunc __attribute__((section(".spinlock.text")))
-
-/*
- * Pull the raw_spinlock_t and raw_rwlock_t definitions:
- */
-#include <linux/spinlock_types.h>
-
-extern int __lockfunc generic__raw_read_trylock(raw_rwlock_t *lock);
-
-/*
- * Pull the __raw*() functions/declarations (UP-nondebug doesnt need them):
- */
-#ifdef CONFIG_SMP
-# include <asm/spinlock.h>
-#else
-# include <linux/spinlock_up.h>
-#endif
-
-#ifdef CONFIG_DEBUG_SPINLOCK
- extern void __spin_lock_init(spinlock_t *lock, const char *name,
- struct lock_class_key *key);
-# define spin_lock_init(lock) \
-do { \
- static struct lock_class_key __key; \
- \
- __spin_lock_init((lock), #lock, &__key); \
-} while (0)
-
-#else
-# define spin_lock_init(lock) \
- do { *(lock) = SPIN_LOCK_UNLOCKED; } 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; } while (0)
-#endif
-
-#define spin_is_locked(lock) __raw_spin_is_locked(&(lock)->raw_lock)
-
-#ifdef CONFIG_GENERIC_LOCKBREAK
-#define spin_is_contended(lock) ((lock)->break_lock)
-#else
-#define spin_is_contended(lock) __raw_spin_is_contended(&(lock)->raw_lock)
-#endif
-
-/**
- * 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)
-
-/*
- * 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
-
-#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);
- extern int _raw_read_trylock(rwlock_t *lock);
- extern void _raw_read_unlock(rwlock_t *lock);
- extern void _raw_write_lock(rwlock_t *lock);
- extern int _raw_write_trylock(rwlock_t *lock);
- extern void _raw_write_unlock(rwlock_t *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_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_trylock(rwlock) __raw_write_trylock(&(rwlock)->raw_lock)
-# define _raw_write_unlock(rwlock) __raw_write_unlock(&(rwlock)->raw_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)
-
-/*
- * 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 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 spin_lock(lock) _spin_lock(lock)
-
-#ifdef CONFIG_DEBUG_LOCK_ALLOC
-# define spin_lock_nested(lock, subclass) _spin_lock_nested(lock, subclass)
-# define 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); \
- } while (0)
-#else
-# define spin_lock_nested(lock, subclass) _spin_lock(lock)
-# define spin_lock_nest_lock(lock, nest_lock) _spin_lock(lock)
-#endif
-
-#define write_lock(lock) _write_lock(lock)
-#define read_lock(lock) _read_lock(lock)
-
-#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK)
-
-#define spin_lock_irqsave(lock, flags) \
- do { \
- typecheck(unsigned long, flags); \
- flags = _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) \
- do { \
- typecheck(unsigned long, flags); \
- flags = _spin_lock_irqsave_nested(lock, subclass); \
- } while (0)
-#else
-#define spin_lock_irqsave_nested(lock, flags, subclass) \
- do { \
- typecheck(unsigned long, flags); \
- flags = _spin_lock_irqsave(lock); \
- } while (0)
-#endif
-
-#else
-
-#define spin_lock_irqsave(lock, flags) \
- do { \
- typecheck(unsigned long, flags); \
- _spin_lock_irqsave(lock, flags); \
- } while (0)
-#define read_lock_irqsave(lock, flags) \
- do { \
- typecheck(unsigned long, flags); \
- _read_lock_irqsave(lock, flags); \
- } while (0)
-#define write_lock_irqsave(lock, flags) \
- do { \
- typecheck(unsigned long, flags); \
- _write_lock_irqsave(lock, flags); \
- } while (0)
-#define spin_lock_irqsave_nested(lock, flags, subclass) \
- spin_lock_irqsave(lock, flags)
-
-#endif
-
-#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)
-
-/*
- * We inline the unlock functions in the nondebug case:
- */
-#if defined(CONFIG_DEBUG_SPINLOCK) || defined(CONFIG_PREEMPT) || \
- !defined(CONFIG_SMP)
-# 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)
-#else
-# define spin_unlock(lock) \
- do {__raw_spin_unlock(&(lock)->raw_lock); __release(lock); } while (0)
-# define read_unlock(lock) \
- do {__raw_read_unlock(&(lock)->raw_lock); __release(lock); } while (0)
-# define write_unlock(lock) \
- do {__raw_write_unlock(&(lock)->raw_lock); __release(lock); } while (0)
-# define spin_unlock_irq(lock) \
-do { \
- __raw_spin_unlock(&(lock)->raw_lock); \
- __release(lock); \
- local_irq_enable(); \
-} while (0)
-# define read_unlock_irq(lock) \
-do { \
- __raw_read_unlock(&(lock)->raw_lock); \
- __release(lock); \
- local_irq_enable(); \
-} while (0)
-# define write_unlock_irq(lock) \
-do { \
- __raw_write_unlock(&(lock)->raw_lock); \
- __release(lock); \
- local_irq_enable(); \
-} while (0)
-#endif
-
-#define spin_unlock_irqrestore(lock, flags) \
- do { \
- typecheck(unsigned long, flags); \
- _spin_unlock_irqrestore(lock, flags); \
- } while (0)
-#define spin_unlock_bh(lock) _spin_unlock_bh(lock)
-
-#define read_unlock_irqrestore(lock, flags) \
- do { \
- typecheck(unsigned long, flags); \
- _read_unlock_irqrestore(lock, flags); \
- } while (0)
-#define read_unlock_bh(lock) _read_unlock_bh(lock)
-
-#define write_unlock_irqrestore(lock, flags) \
- do { \
- typecheck(unsigned long, flags); \
- _write_unlock_irqrestore(lock, flags); \
- } while (0)
-#define write_unlock_bh(lock) _write_unlock_bh(lock)
-
-#define spin_trylock_bh(lock) __cond_lock(lock, _spin_trylock_bh(lock))
-
-#define spin_trylock_irq(lock) \
-({ \
- local_irq_disable(); \
- spin_trylock(lock) ? \
- 1 : ({ local_irq_enable(); 0; }); \
-})
-
-#define spin_trylock_irqsave(lock, flags) \
-({ \
- local_irq_save(flags); \
- spin_trylock(lock) ? \
- 1 : ({ local_irq_restore(flags); 0; }); \
-})
-
-#define write_trylock_irqsave(lock, flags) \
-({ \
- local_irq_save(flags); \
- write_trylock(lock) ? \
- 1 : ({ local_irq_restore(flags); 0; }); \
-})
-
-/*
- * Pull the atomic_t declaration:
- * (asm-mips/atomic.h needs above definitions)
- */
-#include <asm/atomic.h>
-/**
- * atomic_dec_and_lock - lock on reaching reference count zero
- * @atomic: the atomic counter
- * @lock: the spinlock in question
- *
- * Decrements @atomic by 1. If the result is 0, returns true and locks
- * @lock. Returns false for all other cases.
- */
-extern int _atomic_dec_and_lock(atomic_t *atomic, spinlock_t *lock);
-#define atomic_dec_and_lock(atomic, lock) \
- __cond_lock(lock, _atomic_dec_and_lock(atomic, lock))
-
-/**
- * spin_can_lock - would spin_trylock() succeed?
- * @lock: the spinlock in question.
- */
-#define spin_can_lock(lock) (!spin_is_locked(lock))
-
-#endif /* __LINUX_SPINLOCK_H */
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