#include <linux/typecheck.h>
#include <linux/preempt.h>
#include <linux/linkage.h>
#include <linux/compiler.h>
#include <linux/irqflags.h>
#include <linux/thread_info.h>
#include <linux/kernel.h>
#include <linux/stringify.h>
#include <linux/bottom_half.h>
#include <asm/barrier.h>
#include <linux/spinlock_types.h>
#include <linux/spinlock_up.h>
#include <linux/rwlock.h>
#include <linux/spinlock_api_up.h>
#include <linux/atomic.h>

Macros
#define	LOCK_SECTION_NAME ".text..lock."KBUILD_BASENAME

#define	LOCK_SECTION_START(extra)

#define	LOCK_SECTION_END ".previous\n\t"

#define	__lockfunc __attribute__((section(".spinlock.text")))

#define	raw_spin_lock_init(lock) do { *(lock) = __RAW_SPIN_LOCK_UNLOCKED(lock); } while (0)

#define	raw_spin_is_locked(lock) arch_spin_is_locked(&(lock)->raw_lock)

#define	raw_spin_is_contended(lock) (((void)(lock), 0))

#define	raw_spin_unlock_wait(lock) arch_spin_unlock_wait(&(lock)->raw_lock)

#define	raw_spin_trylock(lock) __cond_lock(lock, _raw_spin_trylock(lock))

#define	raw_spin_lock(lock) _raw_spin_lock(lock)

#define	raw_spin_lock_nested(lock, subclass) _raw_spin_lock(lock)

#define	raw_spin_lock_nest_lock(lock, nest_lock) _raw_spin_lock(lock)

#define	raw_spin_lock_irqsave(lock, flags)

#define	raw_spin_lock_irqsave_nested(lock, flags, subclass) raw_spin_lock_irqsave(lock, flags)

#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)

#define	raw_spin_unlock_irqrestore(lock, flags)

#define	raw_spin_unlock_bh(lock) _raw_spin_unlock_bh(lock)

#define	raw_spin_trylock_bh(lock) __cond_lock(lock, _raw_spin_trylock_bh(lock))

#define	raw_spin_trylock_irq(lock)

#define	raw_spin_trylock_irqsave(lock, flags)

#define	raw_spin_can_lock(lock) (!raw_spin_is_locked(lock))

#define	spin_lock_init(_lock)

#define	spin_lock_nested(lock, subclass)

#define	spin_lock_nest_lock(lock, nest_lock)

#define	spin_lock_irqsave(lock, flags)

#define	spin_lock_irqsave_nested(lock, flags, subclass)

#define	spin_trylock_irqsave(lock, flags)

#define	assert_spin_locked(lock) assert_raw_spin_locked(&(lock)->rlock)

#define	atomic_dec_and_lock(atomic, lock) __cond_lock(lock, _atomic_dec_and_lock(atomic, lock))

Functions
int	_atomic_dec_and_lock (atomic_t atomic, spinlock_t lock)

Macro Definition Documentation

#define __lockfunc __attribute__((section(".spinlock.text")))

Definition at line 76 of file spinlock.h.

#define assert_spin_locked ( lock ) assert_raw_spin_locked(&(lock)->rlock)

Definition at line 378 of file spinlock.h.

#define atomic_dec_and_lock	(	atomic,
		lock
	)	__cond_lock(lock, _atomic_dec_and_lock(atomic, lock))

Definition at line 394 of file spinlock.h.

#define LOCK_SECTION_END ".previous\n\t"

Definition at line 73 of file spinlock.h.

#define LOCK_SECTION_NAME ".text..lock."KBUILD_BASENAME

Definition at line 64 of file spinlock.h.

#define LOCK_SECTION_START ( extra )

Value:

".subsection 1\n\t"                     \
        extra                                   \
        ".ifndef " LOCK_SECTION_NAME "\n\t"     \
        LOCK_SECTION_NAME ":\n\t"               \
        ".endif\n"

Definition at line 66 of file spinlock.h.

#define raw_spin_can_lock ( lock ) (!raw_spin_is_locked(lock))

raw_spin_can_lock - would raw_spin_trylock() succeed? : the spinlock in question.

Definition at line 254 of file spinlock.h.

#define raw_spin_is_contended ( lock ) (((void)(lock), 0))

Definition at line 116 of file spinlock.h.

#define raw_spin_is_locked ( lock ) arch_spin_is_locked(&(lock)->raw_lock)

Definition at line 107 of file spinlock.h.

#define raw_spin_lock ( lock ) _raw_spin_lock(lock)

Definition at line 170 of file spinlock.h.

#define raw_spin_lock_bh ( lock ) _raw_spin_lock_bh(lock)

Definition at line 222 of file spinlock.h.

#define raw_spin_lock_init ( lock ) do { *(lock) = __RAW_SPIN_LOCK_UNLOCKED(lock); } while (0)

Definition at line 103 of file spinlock.h.

#define raw_spin_lock_irq ( lock ) _raw_spin_lock_irq(lock)

Definition at line 221 of file spinlock.h.

#define raw_spin_lock_irqsave	(	lock,
		flags
	)

Value:

do {                        \
        typecheck(unsigned long, flags);    \
        _raw_spin_lock_irqsave(lock, flags);    \
    } while (0)

Definition at line 210 of file spinlock.h.

#define raw_spin_lock_irqsave_nested	(	lock,
		flags,
		subclass
	)	raw_spin_lock_irqsave(lock, flags)

Definition at line 216 of file spinlock.h.

#define raw_spin_lock_nest_lock	(	lock,
		nest_lock
	)	_raw_spin_lock(lock)

Definition at line 183 of file spinlock.h.

#define raw_spin_lock_nested	(	lock,
		subclass
	)	_raw_spin_lock(lock)

Definition at line 182 of file spinlock.h.

#define raw_spin_trylock ( lock ) __cond_lock(lock, _raw_spin_trylock(lock))

Definition at line 168 of file spinlock.h.

#define raw_spin_trylock_bh ( lock ) __cond_lock(lock, _raw_spin_trylock_bh(lock))

Definition at line 233 of file spinlock.h.

#define raw_spin_trylock_irq ( lock )

Value:

({ \
    local_irq_disable(); \
    raw_spin_trylock(lock) ? \
    1 : ({ local_irq_enable(); 0;  }); \
})

Definition at line 236 of file spinlock.h.

#define raw_spin_trylock_irqsave	(	lock,
		flags
	)

Value:

({ \
    local_irq_save(flags); \
    raw_spin_trylock(lock) ? \
    1 : ({ local_irq_restore(flags); 0; }); \
})

Definition at line 243 of file spinlock.h.

#define raw_spin_unlock ( lock ) _raw_spin_unlock(lock)

Definition at line 223 of file spinlock.h.

#define raw_spin_unlock_bh ( lock ) _raw_spin_unlock_bh(lock)

Definition at line 231 of file spinlock.h.

#define raw_spin_unlock_irq ( lock ) _raw_spin_unlock_irq(lock)

Definition at line 224 of file spinlock.h.

#define raw_spin_unlock_irqrestore	(	lock,
		flags
	)

Value:

do {                            \
        typecheck(unsigned long, flags);        \
        _raw_spin_unlock_irqrestore(lock, flags);   \
    } while (0)

Definition at line 226 of file spinlock.h.

#define raw_spin_unlock_wait ( lock ) arch_spin_unlock_wait(&(lock)->raw_lock)

raw_spin_unlock_wait - wait until the spinlock gets unlocked : the spinlock in question.

Definition at line 129 of file spinlock.h.

#define spin_lock_init ( _lock )

Value:

do {                            \
    spinlock_check(_lock);              \
    raw_spin_lock_init(&(_lock)->rlock);        \
} while (0)

Definition at line 277 of file spinlock.h.

#define spin_lock_irqsave	(	lock,
		flags
	)

Value:

do {                                \
    raw_spin_lock_irqsave(spinlock_check(lock), flags); \
} while (0)

Definition at line 313 of file spinlock.h.

#define spin_lock_irqsave_nested	(	lock,
		flags,
		subclass
	)

Value:

do {                                    \
    raw_spin_lock_irqsave_nested(spinlock_check(lock), flags, subclass); \
} while (0)

Definition at line 318 of file spinlock.h.

#define spin_lock_nest_lock	(	lock,
		nest_lock
	)

Value:

do {                                    \
    raw_spin_lock_nest_lock(spinlock_check(lock), nest_lock);   \
} while (0)

Definition at line 303 of file spinlock.h.

#define spin_lock_nested	(	lock,
		subclass
	)

Value:

do {                                \
    raw_spin_lock_nested(spinlock_check(lock), subclass);   \
} while (0)

Definition at line 298 of file spinlock.h.

#define spin_trylock_irqsave	(	lock,
		flags
	)

Value:

({                              \
    raw_spin_trylock_irqsave(spinlock_check(lock), flags); \
})

Definition at line 353 of file spinlock.h.

Function Documentation

int _atomic_dec_and_lock	(	atomic_t *	atomic,
		spinlock_t *	lock
	)

atomic_dec_and_lock - lock on reaching reference count zero : the atomic counter : the spinlock in question

Decrements by 1. If the result is 0, returns true and locks . Returns false for all other cases.

Definition at line 20 of file dec_and_lock.c.

Macros

Functions

Macro Definition Documentation

Function Documentation