include/linux/types.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _LINUX_TYPES_H
   3 #define _LINUX_TYPES_H
   4
   5 #define __EXPORTED_HEADERS__
   6 #include <uapi/linux/types.h>
   7
   8 #ifndef __ASSEMBLY__
   9
  10 #define DECLARE_BITMAP(name,bits) \
  11         unsigned long name[BITS_TO_LONGS(bits)]
  12
  13 #ifdef __SIZEOF_INT128__
  14 typedef __s128 s128;
  15 typedef __u128 u128;
  16 #endif
  17
  18 typedef u32 __kernel_dev_t;
  19
  20 typedef __kernel_fd_set         fd_set;
  21 typedef __kernel_dev_t          dev_t;
  22 typedef __kernel_ulong_t        ino_t;
  23 typedef __kernel_mode_t         mode_t;
  24 typedef unsigned short          umode_t;
  25 typedef u32                     nlink_t;
  26 typedef __kernel_off_t          off_t;
  27 typedef __kernel_pid_t          pid_t;
  28 typedef __kernel_daddr_t        daddr_t;
  29 typedef __kernel_key_t          key_t;
  30 typedef __kernel_suseconds_t    suseconds_t;
  31 typedef __kernel_timer_t        timer_t;
  32 typedef __kernel_clockid_t      clockid_t;
  33 typedef __kernel_mqd_t          mqd_t;
  34
  35 typedef _Bool                   bool;
  36
  37 typedef __kernel_uid32_t        uid_t;
  38 typedef __kernel_gid32_t        gid_t;
  39 typedef __kernel_uid16_t        uid16_t;
  40 typedef __kernel_gid16_t        gid16_t;
  41
  42 typedef unsigned long           uintptr_t;
  43 typedef long                    intptr_t;
  44
  45 #ifdef CONFIG_HAVE_UID16
  46 /* This is defined by include/asm-{arch}/posix_types.h */
  47 typedef __kernel_old_uid_t      old_uid_t;
  48 typedef __kernel_old_gid_t      old_gid_t;
  49 #endif /* CONFIG_UID16 */
  50
  51 #if defined(__GNUC__)
  52 typedef __kernel_loff_t         loff_t;
  53 #endif
  54
  55 /*
  56  * The following typedefs are also protected by individual ifdefs for
  57  * historical reasons:
  58  */
  59 #ifndef _SIZE_T
  60 #define _SIZE_T
  61 typedef __kernel_size_t         size_t;
  62 #endif
  63
  64 #ifndef _SSIZE_T
  65 #define _SSIZE_T
  66 typedef __kernel_ssize_t        ssize_t;
  67 #endif
  68
  69 #ifndef _PTRDIFF_T
  70 #define _PTRDIFF_T
  71 typedef __kernel_ptrdiff_t      ptrdiff_t;
  72 #endif
  73
  74 #ifndef _CLOCK_T
  75 #define _CLOCK_T
  76 typedef __kernel_clock_t        clock_t;
  77 #endif
  78
  79 #ifndef _CADDR_T
  80 #define _CADDR_T
  81 typedef __kernel_caddr_t        caddr_t;
  82 #endif
  83
  84 /* bsd */
  85 typedef unsigned char           u_char;
  86 typedef unsigned short          u_short;
  87 typedef unsigned int            u_int;
  88 typedef unsigned long           u_long;
  89
  90 /* sysv */
  91 typedef unsigned char           unchar;
  92 typedef unsigned short          ushort;
  93 typedef unsigned int            uint;
  94 typedef unsigned long           ulong;
  95
  96 #ifndef __BIT_TYPES_DEFINED__
  97 #define __BIT_TYPES_DEFINED__
  98
  99 typedef u8                      u_int8_t;
 100 typedef s8                      int8_t;
 101 typedef u16                     u_int16_t;
 102 typedef s16                     int16_t;
 103 typedef u32                     u_int32_t;
 104 typedef s32                     int32_t;
 105
 106 #endif /* !(__BIT_TYPES_DEFINED__) */
 107
 108 typedef u8                      uint8_t;
 109 typedef u16                     uint16_t;
 110 typedef u32                     uint32_t;
 111
 112 #if defined(__GNUC__)
 113 typedef u64                     uint64_t;
 114 typedef u64                     u_int64_t;
 115 typedef s64                     int64_t;
 116 #endif
 117
 118 /* this is a special 64bit data type that is 8-byte aligned */
 119 #define aligned_u64             __aligned_u64
 120 #define aligned_be64            __aligned_be64
 121 #define aligned_le64            __aligned_le64
 122
 123 /* Nanosecond scalar representation for kernel time values */
 124 typedef s64     ktime_t;
 125
 126 /**
 127  * The type used for indexing onto a disc or disc partition.
 128  *
 129  * Linux always considers sectors to be 512 bytes long independently
 130  * of the devices real block size.
 131  *
 132  * blkcnt_t is the type of the inode's block count.
 133  */
 134 typedef u64 sector_t;
 135 typedef u64 blkcnt_t;
 136
 137 /*
 138  * The type of an index into the pagecache.
 139  */
 140 #define pgoff_t unsigned long
 141
 142 /*
 143  * A dma_addr_t can hold any valid DMA address, i.e., any address returned
 144  * by the DMA API.
 145  *
 146  * If the DMA API only uses 32-bit addresses, dma_addr_t need only be 32
 147  * bits wide.  Bus addresses, e.g., PCI BARs, may be wider than 32 bits,
 148  * but drivers do memory-mapped I/O to ioremapped kernel virtual addresses,
 149  * so they don't care about the size of the actual bus addresses.
 150  */
 151 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
 152 typedef u64 dma_addr_t;
 153 #else
 154 typedef u32 dma_addr_t;
 155 #endif
 156
 157 typedef unsigned int __bitwise gfp_t;
 158 typedef unsigned int __bitwise slab_flags_t;
 159 typedef unsigned int __bitwise fmode_t;
 160
 161 #ifdef CONFIG_PHYS_ADDR_T_64BIT
 162 typedef u64 phys_addr_t;
 163 #else
 164 typedef u32 phys_addr_t;
 165 #endif
 166
 167 typedef phys_addr_t resource_size_t;
 168
 169 /*
 170  * This type is the placeholder for a hardware interrupt number. It has to be
 171  * big enough to enclose whatever representation is used by a given platform.
 172  */
 173 typedef unsigned long irq_hw_number_t;
 174
 175 typedef struct {
 176         int counter;
 177 } atomic_t;
 178
 179 #define ATOMIC_INIT(i) { (i) }
 180
 181 #ifdef CONFIG_64BIT
 182 typedef struct {
 183         s64 counter;
 184 } atomic64_t;
 185 #endif
 186
 187 typedef struct {
 188         atomic_t refcnt;
 189 } rcuref_t;
 190
 191 #define RCUREF_INIT(i)  { .refcnt = ATOMIC_INIT(i - 1) }
 192
 193 struct list_head {
 194         struct list_head *next, *prev;
 195 };
 196
 197 struct hlist_head {
 198         struct hlist_node *first;
 199 };
 200
 201 struct hlist_node {
 202         struct hlist_node *next, **pprev;
 203 };
 204
 205 struct ustat {
 206         __kernel_daddr_t        f_tfree;
 207 #ifdef CONFIG_ARCH_32BIT_USTAT_F_TINODE
 208         unsigned int            f_tinode;
 209 #else
 210         unsigned long           f_tinode;
 211 #endif
 212         char                    f_fname[6];
 213         char                    f_fpack[6];
 214 };
 215
 216 /**
 217  * struct callback_head - callback structure for use with RCU and task_work
 218  * @next: next update requests in a list
 219  * @func: actual update function to call after the grace period.
 220  *
 221  * The struct is aligned to size of pointer. On most architectures it happens
 222  * naturally due ABI requirements, but some architectures (like CRIS) have
 223  * weird ABI and we need to ask it explicitly.
 224  *
 225  * The alignment is required to guarantee that bit 0 of @next will be
 226  * clear under normal conditions -- as long as we use call_rcu() or
 227  * call_srcu() to queue the callback.
 228  *
 229  * This guarantee is important for few reasons:
 230  *  - future call_rcu_lazy() will make use of lower bits in the pointer;
 231  *  - the structure shares storage space in struct page with @compound_head,
 232  *    which encode PageTail() in bit 0. The guarantee is needed to avoid
 233  *    false-positive PageTail().
 234  */
 235 struct callback_head {
 236         struct callback_head *next;
 237         void (*func)(struct callback_head *head);
 238 } __attribute__((aligned(sizeof(void *))));
 239 #define rcu_head callback_head
 240
 241 typedef void (*rcu_callback_t)(struct rcu_head *head);
 242 typedef void (*call_rcu_func_t)(struct rcu_head *head, rcu_callback_t func);
 243
 244 typedef void (*swap_r_func_t)(void *a, void *b, int size, const void *priv);
 245 typedef void (*swap_func_t)(void *a, void *b, int size);
 246
 247 typedef int (*cmp_r_func_t)(const void *a, const void *b, const void *priv);
 248 typedef int (*cmp_func_t)(const void *a, const void *b);
 249
 250 #endif /*  __ASSEMBLY__ */
 251 #endif /* _LINUX_TYPES_H */