LXR linux/include/uapi/linux/types.h

   1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2#ifndef _UAPI_LINUX_TYPES_H
   3#define _UAPI_LINUX_TYPES_H
   4
   5#include <asm/types.h>
   6
   7#ifndef __ASSEMBLY__
   8#ifndef __KERNEL__
   9#ifndef __EXPORTED_HEADERS__
  10#warning "Attempt to use kernel headers from user space, see https://kernelnewbies.org/KernelHeaders"
  11#endif /* __EXPORTED_HEADERS__ */
  12#endif
  13
  14#include <linux/posix_types.h>
  15
  16
  17/*
  18 * Below are truly Linux-specific types that should never collide with
  19 * any application/library that wants linux/types.h.
  20 */
  21
  22#ifdef __CHECKER__
  23#define __bitwise__ __attribute__((bitwise))
  24#else
  25#define __bitwise__
  26#endif
  27#define __bitwise __bitwise__
  28
  29typedef __u16 __bitwise __le16;
  30typedef __u16 __bitwise __be16;
  31typedef __u32 __bitwise __le32;
  32typedef __u32 __bitwise __be32;
  33typedef __u64 __bitwise __le64;
  34typedef __u64 __bitwise __be64;
  35
  36typedef __u16 __bitwise __sum16;
  37typedef __u32 __bitwise __wsum;
  38
  39/*
  40 * aligned_u64 should be used in defining kernel<->userspace ABIs to avoid
  41 * common 32/64-bit compat problems.
  42 * 64-bit values align to 4-byte boundaries on x86_32 (and possibly other
  43 * architectures) and to 8-byte boundaries on 64-bit architectures.  The new
  44 * aligned_64 type enforces 8-byte alignment so that structs containing
  45 * aligned_64 values have the same alignment on 32-bit and 64-bit architectures.
  46 * No conversions are necessary between 32-bit user-space and a 64-bit kernel.
  47 */
  48#define __aligned_u64 __u64 __attribute__((aligned(8)))
  49#define __aligned_be64 __be64 __attribute__((aligned(8)))
  50#define __aligned_le64 __le64 __attribute__((aligned(8)))
  51
  52typedef unsigned __bitwise __poll_t;
  53
  54#endif /*  __ASSEMBLY__ */
  55#endif /* _UAPI_LINUX_TYPES_H */
  56