LXR linux/include/linux/shm.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef _LINUX_SHM_H_
   3#define _LINUX_SHM_H_
   4
   5#include <linux/list.h>
   6#include <asm/page.h>
   7#include <uapi/linux/shm.h>
   8#include <asm/shmparam.h>
   9
  10struct file;
  11
  12#ifdef CONFIG_SYSVIPC
  13struct sysv_shm {
  14        struct list_head shm_clist;
  15};
  16
  17long do_shmat(int shmid, char __user *shmaddr, int shmflg, unsigned long *addr,
  18              unsigned long shmlba);
  19bool is_file_shm_hugepages(struct file *file);
  20void exit_shm(struct task_struct *task);
  21#define shm_init_task(task) INIT_LIST_HEAD(&(task)->sysvshm.shm_clist)
  22#else
  23struct sysv_shm {
  24        /* empty */
  25};
  26
  27static inline long do_shmat(int shmid, char __user *shmaddr,
  28                            int shmflg, unsigned long *addr,
  29                            unsigned long shmlba)
  30{
  31        return -ENOSYS;
  32}
  33static inline bool is_file_shm_hugepages(struct file *file)
  34{
  35        return false;
  36}
  37static inline void exit_shm(struct task_struct *task)
  38{
  39}
  40static inline void shm_init_task(struct task_struct *task)
  41{
  42}
  43#endif
  44
  45#endif /* _LINUX_SHM_H_ */
  46