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__ 14typedef __s128 s128; 15typedef __u128 u128; 16#endif 17 18typedef u32 __kernel_dev_t; 19 20typedef __kernel_fd_set fd_set; 21typedef __kernel_dev_t dev_t; 22typedef __kernel_ulong_t ino_t; 23typedef __kernel_mode_t mode_t; 24typedef unsigned short umode_t; 25typedef u32 nlink_t; 26typedef __kernel_off_t off_t; 27typedef __kernel_pid_t pid_t; 28typedef __kernel_daddr_t daddr_t; 29typedef __kernel_key_t key_t; 30typedef __kernel_suseconds_t suseconds_t; 31typedef __kernel_timer_t timer_t; 32typedef __kernel_clockid_t clockid_t; 33typedef __kernel_mqd_t mqd_t; 34 35typedef _Bool bool; 36 37typedef __kernel_uid32_t uid_t; 38typedef __kernel_gid32_t gid_t; 39typedef __kernel_uid16_t uid16_t; 40typedef __kernel_gid16_t gid16_t; 41 42typedef unsigned long uintptr_t; 43typedef long intptr_t; 44 45#ifdef CONFIG_HAVE_UID16 46/* This is defined by include/asm-{arch}/posix_types.h */ 47typedef __kernel_old_uid_t old_uid_t; 48typedef __kernel_old_gid_t old_gid_t; 49#endif /* CONFIG_UID16 */ 50 51#if defined(__GNUC__) 52typedef __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 61typedef __kernel_size_t size_t; 62#endif 63 64#ifndef _SSIZE_T 65#define _SSIZE_T 66typedef __kernel_ssize_t ssize_t; 67#endif 68 69#ifndef _PTRDIFF_T 70#define _PTRDIFF_T 71typedef __kernel_ptrdiff_t ptrdiff_t; 72#endif 73 74#ifndef _CLOCK_T 75#define _CLOCK_T 76typedef __kernel_clock_t clock_t; 77#endif 78 79#ifndef _CADDR_T 80#define _CADDR_T 81typedef __kernel_caddr_t caddr_t; 82#endif 83 84/* bsd */ 85typedef unsigned char u_char; 86typedef unsigned short u_short; 87typedef unsigned int u_int; 88typedef unsigned long u_long; 89 90/* sysv */ 91typedef unsigned char unchar; 92typedef unsigned short ushort; 93typedef unsigned int uint; 94typedef unsigned long ulong; 95 96#ifndef __BIT_TYPES_DEFINED__ 97#define __BIT_TYPES_DEFINED__ 98 99typedef u8 u_int8_t; 100typedef s8 int8_t; 101typedef u16 u_int16_t; 102typedef s16 int16_t; 103typedef u32 u_int32_t; 104typedef s32 int32_t; 105 106#endif /* !(__BIT_TYPES_DEFINED__) */ 107 108typedef u8 uint8_t; 109typedef u16 uint16_t; 110typedef u32 uint32_t; 111 112#if defined(__GNUC__) 113typedef u64 uint64_t; 114typedef u64 u_int64_t; 115typedef s64 int64_t; 116#endif 117 118/* this is a special 64bit data type that is 8-byte aligned */ 119#define aligned_u64 __aligned_u64 120#define aligned_be64 __aligned_be64 121#define aligned_le64 __aligned_le64 122 123/* Nanosecond scalar representation for kernel time values */ 124typedef s64 ktime_t; 125 126/** 127 * The type used for indexing onto a disc or disc partition. 128 * 129 * Linux always considers sectors to be 512 bytes long independently 130 * of the devices real block size. 131 * 132 * blkcnt_t is the type of the inode's block count. 133 */ 134typedef u64 sector_t; 135typedef u64 blkcnt_t; 136 137/* 138 * The type of an index into the pagecache. 139 */ 140#define pgoff_t unsigned long 141 142/* 143 * A dma_addr_t can hold any valid DMA address, i.e., any address returned 144 * by the DMA API. 145 * 146 * If the DMA API only uses 32-bit addresses, dma_addr_t need only be 32 147 * bits wide. Bus addresses, e.g., PCI BARs, may be wider than 32 bits, 148 * but drivers do memory-mapped I/O to ioremapped kernel virtual addresses, 149 * so they don't care about the size of the actual bus addresses. 150 */ 151#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT 152typedef u64 dma_addr_t; 153#else 154typedef u32 dma_addr_t; 155#endif 156 157typedef unsigned int __bitwise gfp_t; 158typedef unsigned int __bitwise slab_flags_t; 159typedef unsigned int __bitwise fmode_t; 160 161#ifdef CONFIG_PHYS_ADDR_T_64BIT 162typedef u64 phys_addr_t; 163#else 164typedef u32 phys_addr_t; 165#endif 166 167typedef phys_addr_t resource_size_t; 168 169/* 170 * This type is the placeholder for a hardware interrupt number. It has to be 171 * big enough to enclose whatever representation is used by a given platform. 172 */ 173typedef unsigned long irq_hw_number_t; 174 175typedef struct { 176 int counter; 177} atomic_t; 178 179#define ATOMIC_INIT(i) { (i) } 180 181#ifdef CONFIG_64BIT 182typedef struct { 183 s64 counter; 184} atomic64_t; 185#endif 186 187typedef struct { 188 atomic_t refcnt; 189} rcuref_t; 190 191#define RCUREF_INIT(i) { .refcnt = ATOMIC_INIT(i - 1) } 192 193struct list_head { 194 struct list_head *next, *prev; 195}; 196 197struct hlist_head { 198 struct hlist_node *first; 199}; 200 201struct hlist_node { 202 struct hlist_node *next, **pprev; 203}; 204 205struct ustat { 206 __kernel_daddr_t f_tfree; 207#ifdef CONFIG_ARCH_32BIT_USTAT_F_TINODE 208 unsigned int f_tinode; 209#else 210 unsigned long f_tinode; 211#endif 212 char f_fname[6]; 213 char f_fpack[6]; 214}; 215 216/** 217 * struct callback_head - callback structure for use with RCU and task_work 218 * @next: next update requests in a list 219 * @func: actual update function to call after the grace period. 220 * 221 * The struct is aligned to size of pointer. On most architectures it happens 222 * naturally due ABI requirements, but some architectures (like CRIS) have 223 * weird ABI and we need to ask it explicitly. 224 * 225 * The alignment is required to guarantee that bit 0 of @next will be 226 * clear under normal conditions -- as long as we use call_rcu() or 227 * call_srcu() to queue the callback. 228 * 229 * This guarantee is important for few reasons: 230 * - future call_rcu_lazy() will make use of lower bits in the pointer; 231 * - the structure shares storage space in struct page with @compound_head, 232 * which encode PageTail() in bit 0. The guarantee is needed to avoid 233 * false-positive PageTail(). 234 */ 235struct callback_head { 236 struct callback_head *next; 237 void (*func)(struct callback_head *head); 238} __attribute__((aligned(sizeof(void *)))); 239#define rcu_head callback_head 240 241typedef void (*rcu_callback_t)(struct rcu_head *head); 242typedef void (*call_rcu_func_t)(struct rcu_head *head, rcu_callback_t func); 243 244typedef void (*swap_r_func_t)(void *a, void *b, int size, const void *priv); 245typedef void (*swap_func_t)(void *a, void *b, int size); 246 247typedef int (*cmp_r_func_t)(const void *a, const void *b, const void *priv); 248typedef int (*cmp_func_t)(const void *a, const void *b); 249 250#endif /* __ASSEMBLY__ */ 251#endif /* _LINUX_TYPES_H */ 252