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 */ 244