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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_SH_ATOMIC_IRQ_H
#define __ASM_SH_ATOMIC_IRQ_H
#include <linux/irqflags.h>
/*
* To get proper branch prediction for the main line, we must branch
* forward to code at the end of this object's .text section, then
* branch back to restart the operation.
*/
#define ATOMIC_OP(op, c_op) \
static inline void arch_atomic_##op(int i, atomic_t *v) \
{ \
unsigned long flags; \
\
raw_local_irq_save(flags); \
v->counter c_op i; \
raw_local_irq_restore(flags); \
}
#define ATOMIC_OP_RETURN(op, c_op) \
static inline int arch_atomic_##op##_return(int i, atomic_t *v) \
{ \
unsigned long temp, flags; \
\
raw_local_irq_save(flags); \
temp = v->counter; \
temp c_op i; \
v->counter = temp; \
raw_local_irq_restore(flags); \
\
return temp; \
}
#define ATOMIC_FETCH_OP(op, c_op) \
static inline int arch_atomic_fetch_##op(int i, atomic_t *v) \
{ \
unsigned long temp, flags; \
\
raw_local_irq_save(flags); \
temp = v->counter; \
v->counter c_op i; \
raw_local_irq_restore(flags); \
\
return temp; \
}
#define ATOMIC_OPS(op, c_op) \
ATOMIC_OP(op, c_op) \
ATOMIC_OP_RETURN(op, c_op) \
ATOMIC_FETCH_OP(op, c_op)
ATOMIC_OPS(add, +=)
ATOMIC_OPS(sub, -=)
#undef ATOMIC_OPS
#define ATOMIC_OPS(op, c_op) \
ATOMIC_OP(op, c_op) \
ATOMIC_FETCH_OP(op, c_op)
ATOMIC_OPS(and, &=)
ATOMIC_OPS(or, |=)
ATOMIC_OPS(xor, ^=)
#undef ATOMIC_OPS
#undef ATOMIC_FETCH_OP
#undef ATOMIC_OP_RETURN
#undef ATOMIC_OP
#endif /* __ASM_SH_ATOMIC_IRQ_H */