/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */#ifndef __ASM_GENERIC_SHMBUF_H#define __ASM_GENERIC_SHMBUF_H #include <asm/bitsperlong.h>#include <asm/ipcbuf.h>#include <asm/posix_types.h> /* * The shmid64_ds structure for x86 architecture. * Note extra padding because this structure is passed back and forth * between kernel and user space. * * shmid64_ds was originally meant to be architecture specific, but * everyone just ended up making identical copies without specific * optimizations, so we may just as well all use the same one. * * 64 bit architectures use a 64-bit long time field here, while * 32 bit architectures have a pair of unsigned long values. * On big-endian systems, the lower half is in the wrong place. * * * Pad space is left for: * - 2 miscellaneous 32-bit values */ struct shmid64_ds {	struct ipc64_perm	shm_perm;	/* operation perms */	__kernel_size_t		shm_segsz;	/* size of segment (bytes) */#if __BITS_PER_LONG == 64	long			shm_atime;	/* last attach time */	long			shm_dtime;	/* last detach time */	long			shm_ctime;	/* last change time */#else	unsigned long		shm_atime;	/* last attach time */	unsigned long		shm_atime_high;	unsigned long		shm_dtime;	/* last detach time */	unsigned long		shm_dtime_high;	unsigned long		shm_ctime;	/* last change time */	unsigned long		shm_ctime_high;#endif	__kernel_pid_t		shm_cpid;	/* pid of creator */	__kernel_pid_t		shm_lpid;	/* pid of last operator */	unsigned long		shm_nattch;	/* no. of current attaches */	unsigned long		__unused4;	unsigned long		__unused5;}; struct shminfo64 {	unsigned long		shmmax;	unsigned long		shmmin;	unsigned long		shmmni;	unsigned long		shmseg;	unsigned long		shmall;	unsigned long		__unused1;	unsigned long		__unused2;	unsigned long		__unused3;	unsigned long		__unused4;}; #endif /* __ASM_GENERIC_SHMBUF_H */