From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- include/uapi/asm-generic/sembuf.h | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 include/uapi/asm-generic/sembuf.h (limited to 'include/uapi/asm-generic/sembuf.h') diff --git a/include/uapi/asm-generic/sembuf.h b/include/uapi/asm-generic/sembuf.h new file mode 100644 index 000000000..4cb2c13e5 --- /dev/null +++ b/include/uapi/asm-generic/sembuf.h @@ -0,0 +1,38 @@ +#ifndef __ASM_GENERIC_SEMBUF_H +#define __ASM_GENERIC_SEMBUF_H + +#include + +/* + * The semid64_ds structure for x86 architecture. + * Note extra padding because this structure is passed back and forth + * between kernel and user space. + * + * semid64_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 two 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 semid64_ds { + struct ipc64_perm sem_perm; /* permissions .. see ipc.h */ + __kernel_time_t sem_otime; /* last semop time */ +#if __BITS_PER_LONG != 64 + unsigned long __unused1; +#endif + __kernel_time_t sem_ctime; /* last change time */ +#if __BITS_PER_LONG != 64 + unsigned long __unused2; +#endif + unsigned long sem_nsems; /* no. of semaphores in array */ + unsigned long __unused3; + unsigned long __unused4; +}; + +#endif /* __ASM_GENERIC_SEMBUF_H */ -- cgit v1.2.3-54-g00ecf