#ifndef __ASM_SH_ATOMIC_H#define __ASM_SH_ATOMIC_H /* * Atomic operations that C can't guarantee us.  Useful for * resource counting etc.. * */ typedef struct { volatile int counter; } atomic_t; #define ATOMIC_INIT(i)	( (atomic_t) { (i) } ) #define atomic_read(v)		((v)->counter)#define atomic_set(v,i)		((v)->counter = (i)) #include <asm/system.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. */ static __inline__ void atomic_add(int i, atomic_t * v){	unsigned long flags; 	local_irq_save(flags);	*(long *)v += i;	local_irq_restore(flags);} static __inline__ void atomic_sub(int i, atomic_t *v){	unsigned long flags; 	local_irq_save(flags);	*(long *)v -= i;	local_irq_restore(flags);} static __inline__ int atomic_add_return(int i, atomic_t * v){	unsigned long temp, flags; 	local_irq_save(flags);	temp = *(long *)v;	temp += i;	*(long *)v = temp;	local_irq_restore(flags); 	return temp;} #define atomic_add_negative(a, v)	(atomic_add_return((a), (v)) < 0) static __inline__ int atomic_sub_return(int i, atomic_t * v){	unsigned long temp, flags; 	local_irq_save(flags);	temp = *(long *)v;	temp -= i;	*(long *)v = temp;	local_irq_restore(flags); 	return temp;} #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)) static inline int atomic_cmpxchg(atomic_t *v, int old, int new){	int ret;	unsigned long flags; 	local_irq_save(flags);	ret = v->counter;	if (likely(ret == old))		v->counter = new;	local_irq_restore(flags); 	return ret;} #define atomic_xchg(v, new) (xchg(&((v)->counter), new)) static inline int atomic_add_unless(atomic_t *v, int a, int u){	int ret;	unsigned long flags; 	local_irq_save(flags);	ret = v->counter;	if (ret != u)		v->counter += a;	local_irq_restore(flags); 	return ret != u;}#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0) static __inline__ void atomic_clear_mask(unsigned int mask, atomic_t *v){	unsigned long flags; 	local_irq_save(flags);	*(long *)v &= ~mask;	local_irq_restore(flags);} static __inline__ void atomic_set_mask(unsigned int mask, atomic_t *v){	unsigned long flags; 	local_irq_save(flags);	*(long *)v |= mask;	local_irq_restore(flags);} /* Atomic operations are already serializing on SH */#define smp_mb__before_atomic_dec()	barrier()#define smp_mb__after_atomic_dec()	barrier()#define smp_mb__before_atomic_inc()	barrier()#define smp_mb__after_atomic_inc()	barrier() #include <asm-generic/atomic.h>#endif /* __ASM_SH_ATOMIC_H */