[linux-2.6-block.git] / arch / metag / include / asm / atomic.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_METAG_ATOMIC_H
#define __ASM_METAG_ATOMIC_H

#include <linux/compiler.h>
#include <linux/types.h>
#include <asm/cmpxchg.h>
#include <asm/barrier.h>

#if defined(CONFIG_METAG_ATOMICITY_IRQSOFF)
/* The simple UP case. */
#include <asm-generic/atomic.h>
#else

#if defined(CONFIG_METAG_ATOMICITY_LOCK1)
#include <asm/atomic_lock1.h>
#else
#include <asm/atomic_lnkget.h>
#endif

#define atomic_add_negative(a, v)       (atomic_add_return((a), (v)) < 0)

#define atomic_dec_return(v) atomic_sub_return(1, (v))
#define atomic_inc_return(v) atomic_add_return(1, (v))

/*
 * atomic_inc_and_test - increment and test
 * @v: pointer of type atomic_t
 *
 * Atomically increments @v by 1
 * and returns true if the result is zero, or false for all
 * other cases.
 */
#define atomic_inc_and_test(v) (atomic_inc_return(v) == 0)

#define atomic_sub_and_test(i, v) (atomic_sub_return((i), (v)) == 0)
#define atomic_dec_and_test(v) (atomic_sub_return(1, (v)) == 0)

#define atomic_inc(v) atomic_add(1, (v))
#define atomic_dec(v) atomic_sub(1, (v))

#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
#define atomic_dec_if_positive(v)       atomic_sub_if_positive(1, v)

#endif

#include <asm-generic/atomic64.h>

#endif /* __ASM_METAG_ATOMIC_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
6006c0d8 JH	2	#ifndef __ASM_METAG_ATOMIC_H
	3	#define __ASM_METAG_ATOMIC_H
	4
	5	#include <linux/compiler.h>
	6	#include <linux/types.h>
	7	#include <asm/cmpxchg.h>
40074dec	8	#include <asm/barrier.h>
6006c0d8 JH	9
	10	#if defined(CONFIG_METAG_ATOMICITY_IRQSOFF)
	11	/* The simple UP case. */
	12	#include <asm-generic/atomic.h>
	13	#else
	14
	15	#if defined(CONFIG_METAG_ATOMICITY_LOCK1)
	16	#include <asm/atomic_lock1.h>
	17	#else
	18	#include <asm/atomic_lnkget.h>
	19	#endif
	20
	21	#define atomic_add_negative(a, v) (atomic_add_return((a), (v)) < 0)
	22
	23	#define atomic_dec_return(v) atomic_sub_return(1, (v))
	24	#define atomic_inc_return(v) atomic_add_return(1, (v))
	25
	26	/*
	27	* atomic_inc_and_test - increment and test
	28	* @v: pointer of type atomic_t
	29	*
	30	* Atomically increments @v by 1
	31	* and returns true if the result is zero, or false for all
	32	* other cases.
	33	*/
	34	#define atomic_inc_and_test(v) (atomic_inc_return(v) == 0)
	35
	36	#define atomic_sub_and_test(i, v) (atomic_sub_return((i), (v)) == 0)
	37	#define atomic_dec_and_test(v) (atomic_sub_return(1, (v)) == 0)
	38
	39	#define atomic_inc(v) atomic_add(1, (v))
	40	#define atomic_dec(v) atomic_sub(1, (v))
	41
	42	#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
35d04077	43	#define atomic_dec_if_positive(v) atomic_sub_if_positive(1, v)
6006c0d8	44
6006c0d8 JH	45	#endif
6006c0d8 JH	46
6006c0d8 JH	47	#include <asm-generic/atomic64.h>
	48
	49	#endif /* __ASM_METAG_ATOMIC_H */