include/uapi/linux/types.h

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