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/* sparse defines __CHECKER__; see Documentation/dev-tools/sparse.rst */
  23#ifdef __CHECKER__
  24#define __bitwise       __attribute__((bitwise))
  25#else
  26#define __bitwise
  27#endif
  28
  29/* The kernel doesn't use this legacy form, but user space does */
  30#define __bitwise__ __bitwise
  31
  32typedef __u16 __bitwise __le16;
  33typedef __u16 __bitwise __be16;
  34typedef __u32 __bitwise __le32;
  35typedef __u32 __bitwise __be32;
  36typedef __u64 __bitwise __le64;
  37typedef __u64 __bitwise __be64;
  38
  39typedef __u16 __bitwise __sum16;
  40typedef __u32 __bitwise __wsum;
  41
  42/*
  43 * aligned_u64 should be used in defining kernel<->userspace ABIs to avoid
  44 * common 32/64-bit compat problems.
  45 * 64-bit values align to 4-byte boundaries on x86_32 (and possibly other
  46 * architectures) and to 8-byte boundaries on 64-bit architectures.  The new
  47 * aligned_64 type enforces 8-byte alignment so that structs containing
  48 * aligned_64 values have the same alignment on 32-bit and 64-bit architectures.
  49 * No conversions are necessary between 32-bit user-space and a 64-bit kernel.
  50 */
  51#define __aligned_u64 __u64 __attribute__((aligned(8)))
  52#define __aligned_be64 __be64 __attribute__((aligned(8)))
  53#define __aligned_le64 __le64 __attribute__((aligned(8)))
  54
  55typedef unsigned __bitwise __poll_t;
  56
  57#endif /*  __ASSEMBLY__ */
  58#endif /* _UAPI_LINUX_TYPES_H */
  59