c6470150df
Many of the atomic op implementations are the same except for one instruction; fold the lot into a few CPP macros and reduce LoC. This also prepares for easy addition of new ops. Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: linux-sh@vger.kernel.org Link: http://lkml.kernel.org/r/20140508135852.770036493@infradead.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
64 lines
1.4 KiB
C
64 lines
1.4 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, -=)
|
|
|
|
#undef ATOMIC_OPS
|
|
#undef ATOMIC_OP_RETURN
|
|
#undef ATOMIC_OP
|
|
|
|
static inline void atomic_clear_mask(unsigned int mask, atomic_t *v)
|
|
{
|
|
unsigned long flags;
|
|
|
|
raw_local_irq_save(flags);
|
|
v->counter &= ~mask;
|
|
raw_local_irq_restore(flags);
|
|
}
|
|
|
|
static inline void atomic_set_mask(unsigned int mask, atomic_t *v)
|
|
{
|
|
unsigned long flags;
|
|
|
|
raw_local_irq_save(flags);
|
|
v->counter |= mask;
|
|
raw_local_irq_restore(flags);
|
|
}
|
|
|
|
#endif /* __ASM_SH_ATOMIC_IRQ_H */
|