forked from luck/tmp_suning_uos_patched
d2912cb15b
Based on 2 normalized pattern(s): 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 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 # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
67 lines
1.7 KiB
C
67 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
#ifndef __LINUX_CPU_RMAP_H
|
|
#define __LINUX_CPU_RMAP_H
|
|
|
|
/*
|
|
* cpu_rmap.c: CPU affinity reverse-map support
|
|
* Copyright 2011 Solarflare Communications Inc.
|
|
*/
|
|
|
|
#include <linux/cpumask.h>
|
|
#include <linux/gfp.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/kref.h>
|
|
|
|
/**
|
|
* struct cpu_rmap - CPU affinity reverse-map
|
|
* @refcount: kref for object
|
|
* @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 {
|
|
struct kref refcount;
|
|
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);
|
|
extern int cpu_rmap_put(struct cpu_rmap *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];
|
|
}
|
|
|
|
/**
|
|
* 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 /* __LINUX_CPU_RMAP_H */
|