include/uapi/linux/types.h

   1 #ifndef _UAPI_LINUX_TYPES_H
   2 #define _UAPI_LINUX_TYPES_H
   3
   4 #include <asm/types.h>
   5
   6 #ifndef __ASSEMBLY__
   7 #ifndef __KERNEL__
   8 #ifndef __EXPORTED_HEADERS__
   9 #warning "Attempt to use kernel headers from user space, see http://kernelnewbies.org/KernelHeaders"
  10 #endif /* __EXPORTED_HEADERS__ */
  11 #endif
  12
  13 #include <linux/posix_types.h>
  14
  15
  16 /*
  17  * Below are truly Linux-specific types that should never collide with
  18  * any application/library that wants linux/types.h.
  19  */
  20
  21 #ifdef __CHECKER__
  22 #define __bitwise__ __attribute__((bitwise))
  23 #else
  24 #define __bitwise__
  25 #endif
  26 #ifdef __CHECK_ENDIAN__
  27 #define __bitwise __bitwise__
  28 #else
  29 #define __bitwise
  30 #endif
  31
  32 typedef __u16 __bitwise __le16;
  33 typedef __u16 __bitwise __be16;
  34 typedef __u32 __bitwise __le32;
  35 typedef __u32 __bitwise __be32;
  36 typedef __u64 __bitwise __le64;
  37 typedef __u64 __bitwise __be64;
  38
  39 typedef __u16 __bitwise __sum16;
  40 typedef __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
  55 #endif /*  __ASSEMBLY__ */
  56 #endif /* _UAPI_LINUX_TYPES_H */