4da243ac1c
Use the common definitions from hugetlb_encode.h header file for encoding hugetlb size definitions in shmget system call flags. In addition, move these definitions from the internal (kernel) to user (uapi) header file. Link: http://lkml.kernel.org/r/1501527386-10736-4-git-send-email-mike.kravetz@oracle.com Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com> Suggested-by: Matthew Wilcox <willy@infradead.org> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Cc: Anshuman Khandual <khandual@linux.vnet.ibm.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Davidlohr Bueso <dbueso@suse.de> Cc: Michael Kerrisk <mtk.manpages@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
65 lines
1.5 KiB
C
65 lines
1.5 KiB
C
#ifndef _LINUX_SHM_H_
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#define _LINUX_SHM_H_
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#include <linux/list.h>
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#include <asm/page.h>
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#include <uapi/linux/shm.h>
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#include <asm/shmparam.h>
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struct shmid_kernel /* private to the kernel */
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{
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struct kern_ipc_perm shm_perm;
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struct file *shm_file;
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unsigned long shm_nattch;
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unsigned long shm_segsz;
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time_t shm_atim;
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time_t shm_dtim;
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time_t shm_ctim;
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pid_t shm_cprid;
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pid_t shm_lprid;
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struct user_struct *mlock_user;
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/* The task created the shm object. NULL if the task is dead. */
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struct task_struct *shm_creator;
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struct list_head shm_clist; /* list by creator */
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} __randomize_layout;
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/* shm_mode upper byte flags */
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#define SHM_DEST 01000 /* segment will be destroyed on last detach */
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#define SHM_LOCKED 02000 /* segment will not be swapped */
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#ifdef CONFIG_SYSVIPC
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struct sysv_shm {
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struct list_head shm_clist;
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};
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long do_shmat(int shmid, char __user *shmaddr, int shmflg, unsigned long *addr,
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unsigned long shmlba);
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bool is_file_shm_hugepages(struct file *file);
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void exit_shm(struct task_struct *task);
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#define shm_init_task(task) INIT_LIST_HEAD(&(task)->sysvshm.shm_clist)
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#else
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struct sysv_shm {
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/* empty */
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};
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static inline long do_shmat(int shmid, char __user *shmaddr,
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int shmflg, unsigned long *addr,
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unsigned long shmlba)
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{
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return -ENOSYS;
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}
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static inline bool is_file_shm_hugepages(struct file *file)
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{
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return false;
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}
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static inline void exit_shm(struct task_struct *task)
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{
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}
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static inline void shm_init_task(struct task_struct *task)
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{
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}
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#endif
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#endif /* _LINUX_SHM_H_ */
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