mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 02:35:29 +07:00
658aa51459
Implement atomic logic ops -- atomic_{or,xor,and}.
These will replace the atomic_{set,clear}_mask functions that are
available on some archs.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
49 lines
1.1 KiB
C
49 lines
1.1 KiB
C
#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 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 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_OPS(op, c_op) ATOMIC_OP(op, c_op) ATOMIC_OP_RETURN(op, c_op)
|
|
|
|
ATOMIC_OPS(add, +=)
|
|
ATOMIC_OPS(sub, -=)
|
|
ATOMIC_OP(and, &=)
|
|
ATOMIC_OP(or, |=)
|
|
ATOMIC_OP(xor, ^=)
|
|
|
|
#undef ATOMIC_OPS
|
|
#undef ATOMIC_OP_RETURN
|
|
#undef ATOMIC_OP
|
|
|
|
#endif /* __ASM_SH_ATOMIC_IRQ_H */
|