Quelle cpu_rmap.h Sprache: 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_types.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
* @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;
void  **obj;
struct {
  u16 index;
  u16 dist;
}  near[];
};
#define CPU_RMAP_DIST_INF 0xffff

extern struct cpu_rmap *alloc_cpu_rmap(unsigned int size, gfp_t flags);
extern void cpu_rmap_get(struct cpu_rmap *rmap);
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);

int irq_cpu_rmap_remove(struct cpu_rmap *rmap, int irq);
extern int irq_cpu_rmap_add(struct cpu_rmap *rmap, int irq);

#endif /* __LINUX_CPU_RMAP_H */

quality100%

¤ Dauer der Verarbeitung: 0.13 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.