linux/include/linux/types.h
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   1#ifndef _LINUX_TYPES_H
   2#define _LINUX_TYPES_H
   3
   4#include <asm/types.h>
   5
   6#ifndef __ASSEMBLY__
   7#ifdef  __KERNEL__
   8
   9#define DECLARE_BITMAP(name,bits) \
  10        unsigned long name[BITS_TO_LONGS(bits)]
  11#else
  12#ifndef __EXPORTED_HEADERS__
  13#warning "Attempt to use kernel headers from user space, see http://kernelnewbies.org/KernelHeaders"
  14#endif /* __EXPORTED_HEADERS__ */
  15#endif
  16
  17#include <linux/posix_types.h>
  18
  19#ifdef __KERNEL__
  20
  21typedef __u32 __kernel_dev_t;
  22
  23typedef __kernel_fd_set         fd_set;
  24typedef __kernel_dev_t          dev_t;
  25typedef __kernel_ino_t          ino_t;
  26typedef __kernel_mode_t         mode_t;
  27typedef unsigned short          umode_t;
  28typedef __u32                   nlink_t;
  29typedef __kernel_off_t          off_t;
  30typedef __kernel_pid_t          pid_t;
  31typedef __kernel_daddr_t        daddr_t;
  32typedef __kernel_key_t          key_t;
  33typedef __kernel_suseconds_t    suseconds_t;
  34typedef __kernel_timer_t        timer_t;
  35typedef __kernel_clockid_t      clockid_t;
  36typedef __kernel_mqd_t          mqd_t;
  37
  38typedef _Bool                   bool;
  39
  40typedef __kernel_uid32_t        uid_t;
  41typedef __kernel_gid32_t        gid_t;
  42typedef __kernel_uid16_t        uid16_t;
  43typedef __kernel_gid16_t        gid16_t;
  44
  45typedef unsigned long           uintptr_t;
  46
  47#ifdef CONFIG_UID16
  48/* This is defined by include/asm-{arch}/posix_types.h */
  49typedef __kernel_old_uid_t      old_uid_t;
  50typedef __kernel_old_gid_t      old_gid_t;
  51#endif /* CONFIG_UID16 */
  52
  53#if defined(__GNUC__)
  54typedef __kernel_loff_t         loff_t;
  55#endif
  56
  57/*
  58 * The following typedefs are also protected by individual ifdefs for
  59 * historical reasons:
  60 */
  61#ifndef _SIZE_T
  62#define _SIZE_T
  63typedef __kernel_size_t         size_t;
  64#endif
  65
  66#ifndef _SSIZE_T
  67#define _SSIZE_T
  68typedef __kernel_ssize_t        ssize_t;
  69#endif
  70
  71#ifndef _PTRDIFF_T
  72#define _PTRDIFF_T
  73typedef __kernel_ptrdiff_t      ptrdiff_t;
  74#endif
  75
  76#ifndef _TIME_T
  77#define _TIME_T
  78typedef __kernel_time_t         time_t;
  79#endif
  80
  81#ifndef _CLOCK_T
  82#define _CLOCK_T
  83typedef __kernel_clock_t        clock_t;
  84#endif
  85
  86#ifndef _CADDR_T
  87#define _CADDR_T
  88typedef __kernel_caddr_t        caddr_t;
  89#endif
  90
  91/* bsd */
  92typedef unsigned char           u_char;
  93typedef unsigned short          u_short;
  94typedef unsigned int            u_int;
  95typedef unsigned long           u_long;
  96
  97/* sysv */
  98typedef unsigned char           unchar;
  99typedef unsigned short          ushort;
 100typedef unsigned int            uint;
 101typedef unsigned long           ulong;
 102
 103#ifndef __BIT_TYPES_DEFINED__
 104#define __BIT_TYPES_DEFINED__
 105
 106typedef         __u8            u_int8_t;
 107typedef         __s8            int8_t;
 108typedef         __u16           u_int16_t;
 109typedef         __s16           int16_t;
 110typedef         __u32           u_int32_t;
 111typedef         __s32           int32_t;
 112
 113#endif /* !(__BIT_TYPES_DEFINED__) */
 114
 115typedef         __u8            uint8_t;
 116typedef         __u16           uint16_t;
 117typedef         __u32           uint32_t;
 118
 119#if defined(__GNUC__)
 120typedef         __u64           uint64_t;
 121typedef         __u64           u_int64_t;
 122typedef         __s64           int64_t;
 123#endif
 124
 125/* this is a special 64bit data type that is 8-byte aligned */
 126#define aligned_u64 __u64 __attribute__((aligned(8)))
 127#define aligned_be64 __be64 __attribute__((aligned(8)))
 128#define aligned_le64 __le64 __attribute__((aligned(8)))
 129
 130/**
 131 * The type used for indexing onto a disc or disc partition.
 132 *
 133 * Linux always considers sectors to be 512 bytes long independently
 134 * of the devices real block size.
 135 *
 136 * blkcnt_t is the type of the inode's block count.
 137 */
 138#ifdef CONFIG_LBDAF
 139typedef u64 sector_t;
 140typedef u64 blkcnt_t;
 141#else
 142typedef unsigned long sector_t;
 143typedef unsigned long blkcnt_t;
 144#endif
 145
 146/*
 147 * The type of an index into the pagecache.  Use a #define so asm/types.h
 148 * can override it.
 149 */
 150#ifndef pgoff_t
 151#define pgoff_t unsigned long
 152#endif
 153
 154#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
 155typedef u64 dma_addr_t;
 156#else
 157typedef u32 dma_addr_t;
 158#endif /* dma_addr_t */
 159
 160#endif /* __KERNEL__ */
 161
 162/*
 163 * Below are truly Linux-specific types that should never collide with
 164 * any application/library that wants linux/types.h.
 165 */
 166
 167#ifdef __CHECKER__
 168#define __bitwise__ __attribute__((bitwise))
 169#else
 170#define __bitwise__
 171#endif
 172#ifdef __CHECK_ENDIAN__
 173#define __bitwise __bitwise__
 174#else
 175#define __bitwise
 176#endif
 177
 178typedef __u16 __bitwise __le16;
 179typedef __u16 __bitwise __be16;
 180typedef __u32 __bitwise __le32;
 181typedef __u32 __bitwise __be32;
 182typedef __u64 __bitwise __le64;
 183typedef __u64 __bitwise __be64;
 184
 185typedef __u16 __bitwise __sum16;
 186typedef __u32 __bitwise __wsum;
 187
 188/*
 189 * aligned_u64 should be used in defining kernel<->userspace ABIs to avoid
 190 * common 32/64-bit compat problems.
 191 * 64-bit values align to 4-byte boundaries on x86_32 (and possibly other
 192 * architectures) and to 8-byte boundaries on 64-bit architectures.  The new
 193 * aligned_64 type enforces 8-byte alignment so that structs containing
 194 * aligned_64 values have the same alignment on 32-bit and 64-bit architectures.
 195 * No conversions are necessary between 32-bit user-space and a 64-bit kernel.
 196 */
 197#define __aligned_u64 __u64 __attribute__((aligned(8)))
 198#define __aligned_be64 __be64 __attribute__((aligned(8)))
 199#define __aligned_le64 __le64 __attribute__((aligned(8)))
 200
 201#ifdef __KERNEL__
 202typedef unsigned __bitwise__ gfp_t;
 203typedef unsigned __bitwise__ fmode_t;
 204
 205#ifdef CONFIG_PHYS_ADDR_T_64BIT
 206typedef u64 phys_addr_t;
 207#else
 208typedef u32 phys_addr_t;
 209#endif
 210
 211typedef phys_addr_t resource_size_t;
 212
 213/*
 214 * This type is the placeholder for a hardware interrupt number. It has to be
 215 * big enough to enclose whatever representation is used by a given platform.
 216 */
 217typedef unsigned long irq_hw_number_t;
 218
 219typedef struct {
 220        int counter;
 221} atomic_t;
 222
 223#ifdef CONFIG_64BIT
 224typedef struct {
 225        long counter;
 226} atomic64_t;
 227#endif
 228
 229struct list_head {
 230        struct list_head *next, *prev;
 231};
 232
 233struct hlist_head {
 234        struct hlist_node *first;
 235};
 236
 237struct hlist_node {
 238        struct hlist_node *next, **pprev;
 239};
 240
 241struct ustat {
 242        __kernel_daddr_t        f_tfree;
 243        __kernel_ino_t          f_tinode;
 244        char                    f_fname[6];
 245        char                    f_fpack[6];
 246};
 247
 248/**
 249 * struct callback_head - callback structure for use with RCU and task_work
 250 * @next: next update requests in a list
 251 * @func: actual update function to call after the grace period.
 252 */
 253struct callback_head {
 254        struct callback_head *next;
 255        void (*func)(struct callback_head *head);
 256};
 257#define rcu_head callback_head
 258
 259#endif  /* __KERNEL__ */
 260#endif /*  __ASSEMBLY__ */
 261#endif /* _LINUX_TYPES_H */
 262
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