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