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 arch/{arch}/include/asm/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 typedef unsigned long long ullong; 96 97 #ifndef __BIT_TYPES_DEFINED__ 98 #define __BIT_TYPES_DEFINED__ 99 100 typedef u8 u_int8_t; 101 typedef s8 int8_t; 102 typedef u16 u_int16_t; 103 typedef s16 int16_t; 104 typedef u32 u_int32_t; 105 typedef s32 int32_t; 106 107 #endif /* !(__BIT_TYPES_DEFINED__) */ 108 109 typedef u8 uint8_t; 110 typedef u16 uint16_t; 111 typedef u32 uint32_t; 112 113 #if defined(__GNUC__) 114 typedef u64 uint64_t; 115 typedef u64 u_int64_t; 116 typedef s64 int64_t; 117 #endif 118 119 /* These are the special 64-bit data types that are 8-byte aligned */ 120 #define aligned_u64 __aligned_u64 121 #define aligned_s64 __aligned_s64 122 #define aligned_be64 __aligned_be64 123 #define aligned_le64 __aligned_le64 124 125 /* Nanosecond scalar representation for kernel time values */ 126 typedef s64 ktime_t; 127 128 /** 129 * The type used for indexing onto a disc or disc partition. 130 * 131 * Linux always considers sectors to be 512 bytes long independently 132 * of the devices real block size. 133 * 134 * blkcnt_t is the type of the inode's block count. 135 */ 136 typedef u64 sector_t; 137 typedef u64 blkcnt_t; 138 139 /* 140 * The type of an index into the pagecache. 141 */ 142 #define pgoff_t unsigned long 143 144 /* 145 * A dma_addr_t can hold any valid DMA address, i.e., any address returned 146 * by the DMA API. 147 * 148 * If the DMA API only uses 32-bit addresses, dma_addr_t need only be 32 149 * bits wide. Bus addresses, e.g., PCI BARs, may be wider than 32 bits, 150 * but drivers do memory-mapped I/O to ioremapped kernel virtual addresses, 151 * so they don't care about the size of the actual bus addresses. 152 */ 153 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT 154 typedef u64 dma_addr_t; 155 #else 156 typedef u32 dma_addr_t; 157 #endif 158 159 typedef unsigned int __bitwise gfp_t; 160 typedef unsigned int __bitwise slab_flags_t; 161 typedef unsigned int __bitwise fmode_t; 162 163 #ifdef CONFIG_PHYS_ADDR_T_64BIT 164 typedef u64 phys_addr_t; 165 #else 166 typedef u32 phys_addr_t; 167 #endif 168 169 typedef phys_addr_t resource_size_t; 170 171 /* 172 * This type is the placeholder for a hardware interrupt number. It has to be 173 * big enough to enclose whatever representation is used by a given platform. 174 */ 175 typedef unsigned long irq_hw_number_t; 176 177 typedef struct { 178 int counter; 179 } atomic_t; 180 181 #define ATOMIC_INIT(i) { (i) } 182 183 #ifdef CONFIG_64BIT 184 typedef struct { 185 s64 counter; 186 } atomic64_t; 187 #endif 188 189 typedef struct { 190 atomic_t refcnt; 191 } rcuref_t; 192 193 #define RCUREF_INIT(i) { .refcnt = ATOMIC_INIT(i - 1) } 194 195 struct list_head { 196 struct list_head *next, *prev; 197 }; 198 199 struct hlist_head { 200 struct hlist_node *first; 201 }; 202 203 struct hlist_node { 204 struct hlist_node *next, **pprev; 205 }; 206 207 struct ustat { 208 __kernel_daddr_t f_tfree; 209 #ifdef CONFIG_ARCH_32BIT_USTAT_F_TINODE 210 unsigned int f_tinode; 211 #else 212 unsigned long f_tinode; 213 #endif 214 char f_fname[6]; 215 char f_fpack[6]; 216 }; 217 218 /** 219 * struct callback_head - callback structure for use with RCU and task_work 220 * @next: next update requests in a list 221 * @func: actual update function to call after the grace period. 222 * 223 * The struct is aligned to size of pointer. On most architectures it happens 224 * naturally due ABI requirements, but some architectures (like CRIS) have 225 * weird ABI and we need to ask it explicitly. 226 * 227 * The alignment is required to guarantee that bit 0 of @next will be 228 * clear under normal conditions -- as long as we use call_rcu() or 229 * call_srcu() to queue the callback. 230 * 231 * This guarantee is important for few reasons: 232 * - future call_rcu_lazy() will make use of lower bits in the pointer; 233 * - the structure shares storage space in struct page with @compound_head, 234 * which encode PageTail() in bit 0. The guarantee is needed to avoid 235 * false-positive PageTail(). 236 */ 237 struct callback_head { 238 struct callback_head *next; 239 void (*func)(struct callback_head *head); 240 } __attribute__((aligned(sizeof(void *)))); 241 #define rcu_head callback_head 242 243 typedef void (*rcu_callback_t)(struct rcu_head *head); 244 typedef void (*call_rcu_func_t)(struct rcu_head *head, rcu_callback_t func); 245 246 typedef void (*swap_r_func_t)(void *a, void *b, int size, const void *priv); 247 typedef void (*swap_func_t)(void *a, void *b, int size); 248 249 typedef int (*cmp_r_func_t)(const void *a, const void *b, const void *priv); 250 typedef int (*cmp_func_t)(const void *a, const void *b); 251 252 /* 253 * rcuwait provides a way of blocking and waking up a single 254 * task in an rcu-safe manner. 255 * 256 * The only time @task is non-nil is when a user is blocked (or 257 * checking if it needs to) on a condition, and reset as soon as we 258 * know that the condition has succeeded and are awoken. 259 */ 260 struct rcuwait { 261 struct task_struct __rcu *task; 262 }; 263 264 #endif /* __ASSEMBLY__ */ 265 #endif /* _LINUX_TYPES_H */ 266