#ifndef __ASM_GENERIC_MSGBUF_H#define __ASM_GENERIC_MSGBUF_H #include <asm/bitsperlong.h>/* * generic msqid64_ds structure. * * Note extra padding because this structure is passed back and forth * between kernel and user space. * * msqid64_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 typically define a 64 bit __kernel_time_t, * so they do not need the first three padding words. * On big-endian systems, the padding is in the wrong place. * * Pad space is left for: * - 64-bit time_t to solve y2038 problem * - 2 miscellaneous 32-bit values */ struct msqid64_ds {	struct ipc64_perm msg_perm;	__kernel_time_t msg_stime;	/* last msgsnd time */#if __BITS_PER_LONG != 64	unsigned long	__unused1;#endif	__kernel_time_t msg_rtime;	/* last msgrcv time */#if __BITS_PER_LONG != 64	unsigned long	__unused2;#endif	__kernel_time_t msg_ctime;	/* last change time */#if __BITS_PER_LONG != 64	unsigned long	__unused3;#endif	unsigned long  msg_cbytes;	/* current number of bytes on queue */	unsigned long  msg_qnum;	/* number of messages in queue */	unsigned long  msg_qbytes;	/* max number of bytes on queue */	__kernel_pid_t msg_lspid;	/* pid of last msgsnd */	__kernel_pid_t msg_lrpid;	/* last receive pid */	unsigned long  __unused4;	unsigned long  __unused5;}; #endif /* __ASM_GENERIC_MSGBUF_H */