| 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 | |
| 10 | struct file; |
| 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 | bool is_file_shm_hugepages(struct file *file); |
| 20 | void exit_shm(struct task_struct *task); |
| 21 | #define shm_init_task(task) INIT_LIST_HEAD(&(task)->sysvshm.shm_clist) |
| 22 | #else |
| 23 | struct sysv_shm { |
| 24 | /* empty */ |
| 25 | }; |
| 26 | |
| 27 | static inline long do_shmat(int shmid, char __user *shmaddr, |
| 28 | int shmflg, unsigned long *addr, |
| 29 | unsigned long shmlba) |
| 30 | { |
| 31 | return -ENOSYS; |
| 32 | } |
| 33 | static inline bool is_file_shm_hugepages(struct file *file) |
| 34 | { |
| 35 | return false; |
| 36 | } |
| 37 | static inline void exit_shm(struct task_struct *task) |
| 38 | { |
| 39 | } |
| 40 | static inline void shm_init_task(struct task_struct *task) |
| 41 | { |
| 42 | } |
| 43 | #endif |
| 44 | |
| 45 | #endif /* _LINUX_SHM_H_ */ |