types.h 5.6 KB

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