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