#ifndef __LINUX_CPU_RMAP_H#define __LINUX_CPU_RMAP_H /* * cpu_rmap.c: CPU affinity reverse-map support * Copyright 2011 Solarflare Communications Inc. * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 as published * by the Free Software Foundation, incorporated herein by reference. */ #include <linux/cpumask.h>#include <linux/gfp.h>#include <linux/slab.h> /** * struct cpu_rmap - CPU affinity reverse-map * @size: Number of objects to be reverse-mapped * @used: Number of objects added * @obj: Pointer to array of object pointers * @near: For each CPU, the index and distance to the nearest object, *      based on affinity masks */struct cpu_rmap {	u16		size, used;	void		**obj;	struct {		u16	index;		u16	dist;	}		near[0];};#define CPU_RMAP_DIST_INF 0xffff extern struct cpu_rmap *alloc_cpu_rmap(unsigned int size, gfp_t flags); /** * free_cpu_rmap - free CPU affinity reverse-map * @rmap: Reverse-map allocated with alloc_cpu_rmap(), or %NULL */static inline void free_cpu_rmap(struct cpu_rmap *rmap){	kfree(rmap);} extern int cpu_rmap_add(struct cpu_rmap *rmap, void *obj);extern int cpu_rmap_update(struct cpu_rmap *rmap, u16 index,			   const struct cpumask *affinity); static inline u16 cpu_rmap_lookup_index(struct cpu_rmap *rmap, unsigned int cpu){	return rmap->near[cpu].index;} static inline void *cpu_rmap_lookup_obj(struct cpu_rmap *rmap, unsigned int cpu){	return rmap->obj[rmap->near[cpu].index];} #ifdef CONFIG_GENERIC_HARDIRQS /** * alloc_irq_cpu_rmap - allocate CPU affinity reverse-map for IRQs * @size: Number of objects to be mapped * * Must be called in process context. */static inline struct cpu_rmap *alloc_irq_cpu_rmap(unsigned int size){	return alloc_cpu_rmap(size, GFP_KERNEL);}extern void free_irq_cpu_rmap(struct cpu_rmap *rmap); extern int irq_cpu_rmap_add(struct cpu_rmap *rmap, int irq); #endif#endif /* __LINUX_CPU_RMAP_H */