1 /* SPDX-License-Identifier: GPL-2.0 */
5 #include <linux/list.h>
7 #include <uapi/linux/shm.h>
8 #include <asm/shmparam.h>
10 struct shmid_kernel /* private to the kernel */
12 struct kern_ipc_perm shm_perm;
13 struct file *shm_file;
14 unsigned long shm_nattch;
15 unsigned long shm_segsz;
21 struct user_struct *mlock_user;
23 /* The task created the shm object. NULL if the task is dead. */
24 struct task_struct *shm_creator;
25 struct list_head shm_clist; /* list by creator */
28 /* shm_mode upper byte flags */
29 #define SHM_DEST 01000 /* segment will be destroyed on last detach */
30 #define SHM_LOCKED 02000 /* segment will not be swapped */
34 struct list_head shm_clist;
37 long do_shmat(int shmid, char __user *shmaddr, int shmflg, unsigned long *addr,
38 unsigned long shmlba);
39 bool is_file_shm_hugepages(struct file *file);
40 void exit_shm(struct task_struct *task);
41 #define shm_init_task(task) INIT_LIST_HEAD(&(task)->sysvshm.shm_clist)
47 static inline long do_shmat(int shmid, char __user *shmaddr,
48 int shmflg, unsigned long *addr,
53 static inline bool is_file_shm_hugepages(struct file *file)
57 static inline void exit_shm(struct task_struct *task)
60 static inline void shm_init_task(struct task_struct *task)
65 #endif /* _LINUX_SHM_H_ */