| 1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859 |
- /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
- #ifndef __ASM_GENERIC_SHMBUF_H
- #define __ASM_GENERIC_SHMBUF_H
- #include <asm/bitsperlong.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 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:
- * - 2 miscellaneous 32-bit values
- */
- struct shmid64_ds {
- struct ipc64_perm shm_perm; /* operation perms */
- size_t shm_segsz; /* size of segment (bytes) */
- #if __BITS_PER_LONG == 64
- __kernel_time_t shm_atime; /* last attach time */
- __kernel_time_t shm_dtime; /* last detach time */
- __kernel_time_t 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 */
|
