8a1ab3155c
Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Michael Kerrisk <mtk.manpages@gmail.com> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Acked-by: Dave Jones <davej@redhat.com>
38 lines
1.2 KiB
C
38 lines
1.2 KiB
C
#ifndef __ASM_GENERIC_SEMBUF_H
|
|
#define __ASM_GENERIC_SEMBUF_H
|
|
|
|
#include <asm/bitsperlong.h>
|
|
|
|
/*
|
|
* 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 */
|