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 _CLOCK_T 69 #define _CLOCK_T 70 typedef __kernel_clock_t clock_t; 71 #endif 72 73 #ifndef _CADDR_T 74 #define _CADDR_T 75 typedef __kernel_caddr_t caddr_t; 76 #endif 77 78 /* bsd */ 79 typedef unsigned char u_char; 80 typedef unsigned short u_short; 81 typedef unsigned int u_int; 82 typedef unsigned long u_long; 83 84 /* sysv */ 85 typedef unsigned char unchar; 86 typedef unsigned short ushort; 87 typedef unsigned int uint; 88 typedef unsigned long ulong; 89 90 #ifndef __BIT_TYPES_DEFINED__ 91 #define __BIT_TYPES_DEFINED__ 92 93 typedef u8 u_int8_t; 94 typedef s8 int8_t; 95 typedef u16 u_int16_t; 96 typedef s16 int16_t; 97 typedef u32 u_int32_t; 98 typedef s32 int32_t; 99 100 #endif /* !(__BIT_TYPES_DEFINED__) */ 101 102 typedef u8 uint8_t; 103 typedef u16 uint16_t; 104 typedef u32 uint32_t; 105 106 #if defined(__GNUC__) 107 typedef u64 uint64_t; 108 typedef u64 u_int64_t; 109 typedef s64 int64_t; 110 #endif 111 112 /* this is a special 64bit data type that is 8-byte aligned */ 113 #define aligned_u64 __aligned_u64 114 #define aligned_be64 __aligned_be64 115 #define aligned_le64 __aligned_le64 116 117 /** 118 * The type used for indexing onto a disc or disc partition. 119 * 120 * Linux always considers sectors to be 512 bytes long independently 121 * of the devices real block size. 122 * 123 * blkcnt_t is the type of the inode's block count. 124 */ 125 typedef u64 sector_t; 126 typedef u64 blkcnt_t; 127 128 /* 129 * The type of an index into the pagecache. 130 */ 131 #define pgoff_t unsigned long 132 133 /* 134 * A dma_addr_t can hold any valid DMA address, i.e., any address returned 135 * by the DMA API. 136 * 137 * If the DMA API only uses 32-bit addresses, dma_addr_t need only be 32 138 * bits wide. Bus addresses, e.g., PCI BARs, may be wider than 32 bits, 139 * but drivers do memory-mapped I/O to ioremapped kernel virtual addresses, 140 * so they don't care about the size of the actual bus addresses. 141 */ 142 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT 143 typedef u64 dma_addr_t; 144 #else 145 typedef u32 dma_addr_t; 146 #endif 147 148 typedef unsigned int __bitwise gfp_t; 149 typedef unsigned int __bitwise slab_flags_t; 150 typedef unsigned int __bitwise fmode_t; 151 152 #ifdef CONFIG_PHYS_ADDR_T_64BIT 153 typedef u64 phys_addr_t; 154 #else 155 typedef u32 phys_addr_t; 156 #endif 157 158 typedef phys_addr_t resource_size_t; 159 160 /* 161 * This type is the placeholder for a hardware interrupt number. It has to be 162 * big enough to enclose whatever representation is used by a given platform. 163 */ 164 typedef unsigned long irq_hw_number_t; 165 166 typedef struct { 167 int counter; 168 } atomic_t; 169 170 #define ATOMIC_INIT(i) { (i) } 171 172 #ifdef CONFIG_64BIT 173 typedef struct { 174 s64 counter; 175 } atomic64_t; 176 #endif 177 178 struct list_head { 179 struct list_head *next, *prev; 180 }; 181 182 struct hlist_head { 183 struct hlist_node *first; 184 }; 185 186 struct hlist_node { 187 struct hlist_node *next, **pprev; 188 }; 189 190 struct ustat { 191 __kernel_daddr_t f_tfree; 192 __kernel_ino_t f_tinode; 193 char f_fname[6]; 194 char f_fpack[6]; 195 }; 196 197 /** 198 * struct callback_head - callback structure for use with RCU and task_work 199 * @next: next update requests in a list 200 * @func: actual update function to call after the grace period. 201 * 202 * The struct is aligned to size of pointer. On most architectures it happens 203 * naturally due ABI requirements, but some architectures (like CRIS) have 204 * weird ABI and we need to ask it explicitly. 205 * 206 * The alignment is required to guarantee that bit 0 of @next will be 207 * clear under normal conditions -- as long as we use call_rcu() or 208 * call_srcu() to queue the callback. 209 * 210 * This guarantee is important for few reasons: 211 * - future call_rcu_lazy() will make use of lower bits in the pointer; 212 * - the structure shares storage space in struct page with @compound_head, 213 * which encode PageTail() in bit 0. The guarantee is needed to avoid 214 * false-positive PageTail(). 215 */ 216 struct callback_head { 217 struct callback_head *next; 218 void (*func)(struct callback_head *head); 219 } __attribute__((aligned(sizeof(void *)))); 220 #define rcu_head callback_head 221 222 typedef void (*rcu_callback_t)(struct rcu_head *head); 223 typedef void (*call_rcu_func_t)(struct rcu_head *head, rcu_callback_t func); 224 225 typedef void (*swap_func_t)(void *a, void *b, int size); 226 227 typedef int (*cmp_r_func_t)(const void *a, const void *b, const void *priv); 228 typedef int (*cmp_func_t)(const void *a, const void *b); 229 230 #endif /* __ASSEMBLY__ */ 231 #endif /* _LINUX_TYPES_H */ 232