linux/include/uapi/asm-generic/shmbuf.h

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License cleanup: add SPDX license identifier to uapi header files with no license Many user space API headers are missing licensing information, which makes it hard for compliance tools to determine the correct license. By default are files without license information under the default license of the kernel, which is GPLV2. Marking them GPLV2 would exclude them from being included in non GPLV2 code, which is obviously not intended. The user space API headers fall under the syscall exception which is in the kernels COPYING file: NOTE! This copyright does *not* cover user programs that use kernel services by normal system calls - this is merely considered normal use of the kernel, and does *not* fall under the heading of "derived work". otherwise syscall usage would not be possible. Update the files which contain no license information with an SPDX license identifier. The chosen identifier is 'GPL-2.0 WITH Linux-syscall-note' which is the officially assigned identifier for the Linux syscall exception. SPDX license identifiers are a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. See the previous patch in this series for the methodology of how this patch was researched. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-01 14:08:43 +00:00
/* 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:
* - 64-bit time_t to solve y2038 problem
* - 2 miscellaneous 32-bit values
*/
struct shmid64_ds {
struct ipc64_perm shm_perm; /* operation perms */
size_t shm_segsz; /* size of segment (bytes) */
__kernel_time_t shm_atime; /* last attach time */
#if __BITS_PER_LONG != 64
unsigned long __unused1;
#endif
__kernel_time_t shm_dtime; /* last detach time */
#if __BITS_PER_LONG != 64
unsigned long __unused2;
#endif
__kernel_time_t shm_ctime; /* last change time */
#if __BITS_PER_LONG != 64
unsigned long __unused3;
#endif
__kernel_pid_t shm_cpid; /* pid of creator */
__kernel_pid_t shm_lpid; /* pid of last operator */
__kernel_ulong_t shm_nattch; /* no. of current attaches */
__kernel_ulong_t __unused4;
__kernel_ulong_t __unused5;
};
struct shminfo64 {
__kernel_ulong_t shmmax;
__kernel_ulong_t shmmin;
__kernel_ulong_t shmmni;
__kernel_ulong_t shmseg;
__kernel_ulong_t shmall;
__kernel_ulong_t __unused1;
__kernel_ulong_t __unused2;
__kernel_ulong_t __unused3;
__kernel_ulong_t __unused4;
};
#endif /* __ASM_GENERIC_SHMBUF_H */