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 http://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
  29 typedef __u16 __bitwise __le16;
  30 typedef __u16 __bitwise __be16;
  31 typedef __u32 __bitwise __le32;
  32 typedef __u32 __bitwise __be32;
  33 typedef __u64 __bitwise __le64;
  34 typedef __u64 __bitwise __be64;
  35
  36 typedef __u16 __bitwise __sum16;
  37 typedef __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
  52 #ifdef __CHECK_POLL
  53 typedef unsigned __bitwise __poll_t;
  54 #else
  55 typedef unsigned __poll_t;
  56 #endif
  57
  58 #endif /*  __ASSEMBLY__ */
  59 #endif /* _UAPI_LINUX_TYPES_H */