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