atomic, arch: Audit atomic_{read,set}()

[mirror_ubuntu-bionic-kernel.git] / include / asm-generic / atomic-long.h

#ifndef _ASM_GENERIC_ATOMIC_LONG_H
#define _ASM_GENERIC_ATOMIC_LONG_H
/*
 * Copyright (C) 2005 Silicon Graphics, Inc.
 *	Christoph Lameter
 *
 * Allows to provide arch independent atomic definitions without the need to
 * edit all arch specific atomic.h files.
 */

#include <asm/types.h>

/*
 * Suppport for atomic_long_t
 *
 * Casts for parameters are avoided for existing atomic functions in order to
 * avoid issues with cast-as-lval under gcc 4.x and other limitations that the
 * macros of a platform may have.
 */

#if BITS_PER_LONG == 64

typedef atomic64_t atomic_long_t;

#define ATOMIC_LONG_INIT(i)	ATOMIC64_INIT(i)
#define ATOMIC_LONG_PFX(x)	atomic64 ## x

#else

typedef atomic_t atomic_long_t;

#define ATOMIC_LONG_INIT(i)	ATOMIC_INIT(i)
#define ATOMIC_LONG_PFX(x)	atomic ## x

#endif

#define ATOMIC_LONG_READ_OP(mo)						\
static inline long atomic_long_read##mo(atomic_long_t *l)		\
{									\
	ATOMIC_LONG_PFX(_t) *v = (ATOMIC_LONG_PFX(_t) *)l;		\
									\
	return (long)ATOMIC_LONG_PFX(_read##mo)(v);			\
}
ATOMIC_LONG_READ_OP()
ATOMIC_LONG_READ_OP(_acquire)

#undef ATOMIC_LONG_READ_OP

#define ATOMIC_LONG_SET_OP(mo)						\
static inline void atomic_long_set##mo(atomic_long_t *l, long i)	\
{									\
	ATOMIC_LONG_PFX(_t) *v = (ATOMIC_LONG_PFX(_t) *)l;		\
									\
	ATOMIC_LONG_PFX(_set##mo)(v, i);				\
}
ATOMIC_LONG_SET_OP()
ATOMIC_LONG_SET_OP(_release)

#undef ATOMIC_LONG_SET_OP

#define ATOMIC_LONG_ADD_SUB_OP(op, mo)					\
static inline long							\
atomic_long_##op##_return##mo(long i, atomic_long_t *l)			\
{									\
	ATOMIC_LONG_PFX(_t) *v = (ATOMIC_LONG_PFX(_t) *)l;		\
									\
	return (long)ATOMIC_LONG_PFX(_##op##_return##mo)(i, v);		\
}
ATOMIC_LONG_ADD_SUB_OP(add,)
ATOMIC_LONG_ADD_SUB_OP(add, _relaxed)
ATOMIC_LONG_ADD_SUB_OP(add, _acquire)
ATOMIC_LONG_ADD_SUB_OP(add, _release)
ATOMIC_LONG_ADD_SUB_OP(sub,)
ATOMIC_LONG_ADD_SUB_OP(sub, _relaxed)
ATOMIC_LONG_ADD_SUB_OP(sub, _acquire)
ATOMIC_LONG_ADD_SUB_OP(sub, _release)

#undef ATOMIC_LONG_ADD_SUB_OP

#define atomic_long_cmpxchg_relaxed(l, old, new) \
	(ATOMIC_LONG_PFX(_cmpxchg_relaxed)((ATOMIC_LONG_PFX(_t) *)(l), \
					   (old), (new)))
#define atomic_long_cmpxchg_acquire(l, old, new) \
	(ATOMIC_LONG_PFX(_cmpxchg_acquire)((ATOMIC_LONG_PFX(_t) *)(l), \
					   (old), (new)))
#define atomic_long_cmpxchg_release(l, old, new) \
	(ATOMIC_LONG_PFX(_cmpxchg_release)((ATOMIC_LONG_PFX(_t) *)(l), \
					   (old), (new)))
#define atomic_long_cmpxchg(l, old, new) \
	(ATOMIC_LONG_PFX(_cmpxchg)((ATOMIC_LONG_PFX(_t) *)(l), (old), (new)))

#define atomic_long_xchg_relaxed(v, new) \
	(ATOMIC_LONG_PFX(_xchg_relaxed)((ATOMIC_LONG_PFX(_t) *)(v), (new)))
#define atomic_long_xchg_acquire(v, new) \
	(ATOMIC_LONG_PFX(_xchg_acquire)((ATOMIC_LONG_PFX(_t) *)(v), (new)))
#define atomic_long_xchg_release(v, new) \
	(ATOMIC_LONG_PFX(_xchg_release)((ATOMIC_LONG_PFX(_t) *)(v), (new)))
#define atomic_long_xchg(v, new) \
	(ATOMIC_LONG_PFX(_xchg)((ATOMIC_LONG_PFX(_t) *)(v), (new)))

static inline void atomic_long_inc(atomic_long_t *l)
{
	ATOMIC_LONG_PFX(_t) *v = (ATOMIC_LONG_PFX(_t) *)l;

	ATOMIC_LONG_PFX(_inc)(v);
}

static inline void atomic_long_dec(atomic_long_t *l)
{
	ATOMIC_LONG_PFX(_t) *v = (ATOMIC_LONG_PFX(_t) *)l;

	ATOMIC_LONG_PFX(_dec)(v);
}

#define ATOMIC_LONG_OP(op)						\
static inline void							\
atomic_long_##op(long i, atomic_long_t *l)				\
{									\
	ATOMIC_LONG_PFX(_t) *v = (ATOMIC_LONG_PFX(_t) *)l;		\
									\
	ATOMIC_LONG_PFX(_##op)(i, v);					\
}

ATOMIC_LONG_OP(add)
ATOMIC_LONG_OP(sub)
ATOMIC_LONG_OP(and)
ATOMIC_LONG_OP(or)
ATOMIC_LONG_OP(xor)
ATOMIC_LONG_OP(andnot)

#undef ATOMIC_LONG_OP

static inline int atomic_long_sub_and_test(long i, atomic_long_t *l)
{
	ATOMIC_LONG_PFX(_t) *v = (ATOMIC_LONG_PFX(_t) *)l;

	return ATOMIC_LONG_PFX(_sub_and_test)(i, v);
}

static inline int atomic_long_dec_and_test(atomic_long_t *l)
{
	ATOMIC_LONG_PFX(_t) *v = (ATOMIC_LONG_PFX(_t) *)l;

	return ATOMIC_LONG_PFX(_dec_and_test)(v);
}

static inline int atomic_long_inc_and_test(atomic_long_t *l)
{
	ATOMIC_LONG_PFX(_t) *v = (ATOMIC_LONG_PFX(_t) *)l;

	return ATOMIC_LONG_PFX(_inc_and_test)(v);
}

static inline int atomic_long_add_negative(long i, atomic_long_t *l)
{
	ATOMIC_LONG_PFX(_t) *v = (ATOMIC_LONG_PFX(_t) *)l;

	return ATOMIC_LONG_PFX(_add_negative)(i, v);
}

static inline long atomic_long_inc_return(atomic_long_t *l)
{
	ATOMIC_LONG_PFX(_t) *v = (ATOMIC_LONG_PFX(_t) *)l;

	return (long)ATOMIC_LONG_PFX(_inc_return)(v);
}

static inline long atomic_long_dec_return(atomic_long_t *l)
{
	ATOMIC_LONG_PFX(_t) *v = (ATOMIC_LONG_PFX(_t) *)l;

	return (long)ATOMIC_LONG_PFX(_dec_return)(v);
}

static inline long atomic_long_add_unless(atomic_long_t *l, long a, long u)
{
	ATOMIC_LONG_PFX(_t) *v = (ATOMIC_LONG_PFX(_t) *)l;

	return (long)ATOMIC_LONG_PFX(_add_unless)(v, a, u);
}

#define atomic_long_inc_not_zero(l) \
	ATOMIC_LONG_PFX(_inc_not_zero)((ATOMIC_LONG_PFX(_t) *)(l))

#endif  /*  _ASM_GENERIC_ATOMIC_LONG_H  */