types.h (1819B)
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 */