[linux-2.6-block.git] / include / linux / shm.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_SHM_H_
#define _LINUX_SHM_H_

#include <linux/types.h>
#include <asm/page.h>
#include <asm/shmparam.h>

struct file;
struct task_struct;

#ifdef CONFIG_SYSVIPC
struct sysv_shm {
	struct list_head shm_clist;
};

long do_shmat(int shmid, char __user *shmaddr, int shmflg, unsigned long *addr,
	      unsigned long shmlba);
bool is_file_shm_hugepages(struct file *file);
void exit_shm(struct task_struct *task);
#define shm_init_task(task) INIT_LIST_HEAD(&(task)->sysvshm.shm_clist)
#else
struct sysv_shm {
	/* empty */
};

static inline long do_shmat(int shmid, char __user *shmaddr,
			    int shmflg, unsigned long *addr,
			    unsigned long shmlba)
{
	return -ENOSYS;
}
static inline bool is_file_shm_hugepages(struct file *file)
{
	return false;
}
static inline void exit_shm(struct task_struct *task)
{
}
static inline void shm_init_task(struct task_struct *task)
{
}
#endif

#endif /* _LINUX_SHM_H_ */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4 LT	2	#ifndef _LINUX_SHM_H_
	3	#define _LINUX_SHM_H_
	4
bc46ef3c	5	#include <linux/types.h>
1da177e4	6	#include <asm/page.h>
1da177e4	7	#include <asm/shmparam.h>
060028ba	8
8ecd2953	9	struct file;
bc46ef3c	10	struct task_struct;
8ecd2953	11
1da177e4	12	#ifdef CONFIG_SYSVIPC
ab602f79 JM	13	struct sysv_shm {
	14	struct list_head shm_clist;
	15	};
	16
079a96ae WD	17	long do_shmat(int shmid, char __user shmaddr, int shmflg, unsigned long addr,
079a96ae WD	18	unsigned long shmlba);
2954e440	19	bool is_file_shm_hugepages(struct file *file);
ab602f79 JM	20	void exit_shm(struct task_struct *task);
ab602f79 JM	21	#define shm_init_task(task) INIT_LIST_HEAD(&(task)->sysvshm.shm_clist)
1da177e4	22	#else
ab602f79 JM	23	struct sysv_shm {
	24	/* empty */
	25	};
	26
1da177e4	27	static inline long do_shmat(int shmid, char __user *shmaddr,
079a96ae WD	28	int shmflg, unsigned long *addr,
079a96ae WD	29	unsigned long shmlba)
1da177e4 LT	30	{
	31	return -ENOSYS;
	32	}
2954e440	33	static inline bool is_file_shm_hugepages(struct file *file)
516dffdc	34	{
2954e440	35	return false;
516dffdc	36	}
b34a6b1d VK	37	static inline void exit_shm(struct task_struct *task)
	38	{
	39	}
ab602f79 JM	40	static inline void shm_init_task(struct task_struct *task)
	41	{
	42	}
1da177e4 LT	43	#endif
1da177e4 LT	44
1da177e4	45	#endif /* _LINUX_SHM_H_ */