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 13typedef u32 __kernel_dev_t; 14 15typedef __kernel_fd_set fd_set; 16typedef __kernel_dev_t dev_t; 17typedef __kernel_ino_t ino_t; 18typedef __kernel_mode_t mode_t; 19typedef unsigned short umode_t; 20typedef u32 nlink_t; 21typedef __kernel_off_t off_t; 22typedef __kernel_pid_t pid_t; 23typedef __kernel_daddr_t daddr_t; 24typedef __kernel_key_t key_t; 25typedef __kernel_suseconds_t suseconds_t; 26typedef __kernel_timer_t timer_t; 27typedef __kernel_clockid_t clockid_t; 28typedef __kernel_mqd_t mqd_t; 29 30typedef _Bool bool; 31 32typedef __kernel_uid32_t uid_t; 33typedef __kernel_gid32_t gid_t; 34typedef __kernel_uid16_t uid16_t; 35typedef __kernel_gid16_t gid16_t; 36 37typedef unsigned long uintptr_t; 38 39#ifdef CONFIG_HAVE_UID16 40/* This is defined by include/asm-{arch}/posix_types.h */ 41typedef __kernel_old_uid_t old_uid_t; 42typedef __kernel_old_gid_t old_gid_t; 43#endif /* CONFIG_UID16 */ 44 45#if defined(__GNUC__) 46typedef __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 55typedef __kernel_size_t size_t; 56#endif 57 58#ifndef _SSIZE_T 59#define _SSIZE_T 60typedef __kernel_ssize_t ssize_t; 61#endif 62 63#ifndef _PTRDIFF_T 64#define _PTRDIFF_T 65typedef __kernel_ptrdiff_t ptrdiff_t; 66#endif 67 68#ifndef _TIME_T 69#define _TIME_T 70typedef __kernel_time_t time_t; 71#endif 72 73#ifndef _CLOCK_T 74#define _CLOCK_T 75typedef __kernel_clock_t clock_t; 76#endif 77 78#ifndef _CADDR_T 79#define _CADDR_T 80typedef __kernel_caddr_t caddr_t; 81#endif 82 83/* bsd */ 84typedef unsigned char u_char; 85typedef unsigned short u_short; 86typedef unsigned int u_int; 87typedef unsigned long u_long; 88 89/* sysv */ 90typedef unsigned char unchar; 91typedef unsigned short ushort; 92typedef unsigned int uint; 93typedef unsigned long ulong; 94 95#ifndef __BIT_TYPES_DEFINED__ 96#define __BIT_TYPES_DEFINED__ 97 98typedef u8 u_int8_t; 99typedef s8 int8_t; 100typedef u16 u_int16_t; 101typedef s16 int16_t; 102typedef u32 u_int32_t; 103typedef s32 int32_t; 104 105#endif /* !(__BIT_TYPES_DEFINED__) */ 106 107typedef u8 uint8_t; 108typedef u16 uint16_t; 109typedef u32 uint32_t; 110 111#if defined(__GNUC__) 112typedef u64 uint64_t; 113typedef u64 u_int64_t; 114typedef s64 int64_t; 115#endif 116 117/* this is a special 64bit data type that is 8-byte aligned */ 118#define aligned_u64 __aligned_u64 119#define aligned_be64 __aligned_be64 120#define aligned_le64 __aligned_le64 121 122/** 123 * The type used for indexing onto a disc or disc partition. 124 * 125 * Linux always considers sectors to be 512 bytes long independently 126 * of the devices real block size. 127 * 128 * blkcnt_t is the type of the inode's block count. 129 */ 130typedef u64 sector_t; 131typedef u64 blkcnt_t; 132 133/* 134 * The type of an index into the pagecache. 135 */ 136#define pgoff_t unsigned long 137 138/* 139 * A dma_addr_t can hold any valid DMA address, i.e., any address returned 140 * by the DMA API. 141 * 142 * If the DMA API only uses 32-bit addresses, dma_addr_t need only be 32 143 * bits wide. Bus addresses, e.g., PCI BARs, may be wider than 32 bits, 144 * but drivers do memory-mapped I/O to ioremapped kernel virtual addresses, 145 * so they don't care about the size of the actual bus addresses. 146 */ 147#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT 148typedef u64 dma_addr_t; 149#else 150typedef u32 dma_addr_t; 151#endif 152 153typedef unsigned int __bitwise gfp_t; 154typedef unsigned int __bitwise slab_flags_t; 155typedef unsigned int __bitwise fmode_t; 156 157#ifdef CONFIG_PHYS_ADDR_T_64BIT 158typedef u64 phys_addr_t; 159#else 160typedef u32 phys_addr_t; 161#endif 162 163typedef phys_addr_t resource_size_t; 164 165/* 166 * This type is the placeholder for a hardware interrupt number. It has to be 167 * big enough to enclose whatever representation is used by a given platform. 168 */ 169typedef unsigned long irq_hw_number_t; 170 171typedef struct { 172 int counter; 173} atomic_t; 174 175#ifdef CONFIG_64BIT 176typedef struct { 177 s64 counter; 178} atomic64_t; 179#endif 180 181struct list_head { 182 struct list_head *next, *prev; 183}; 184 185struct hlist_head { 186 struct hlist_node *first; 187}; 188 189struct hlist_node { 190 struct hlist_node *next, **pprev; 191}; 192 193struct ustat { 194 __kernel_daddr_t f_tfree; 195 __kernel_ino_t f_tinode; 196 char f_fname[6]; 197 char f_fpack[6]; 198}; 199 200/** 201 * struct callback_head - callback structure for use with RCU and task_work 202 * @next: next update requests in a list 203 * @func: actual update function to call after the grace period. 204 * 205 * The struct is aligned to size of pointer. On most architectures it happens 206 * naturally due ABI requirements, but some architectures (like CRIS) have 207 * weird ABI and we need to ask it explicitly. 208 * 209 * The alignment is required to guarantee that bit 0 of @next will be 210 * clear under normal conditions -- as long as we use call_rcu() or 211 * call_srcu() to queue the callback. 212 * 213 * This guarantee is important for few reasons: 214 * - future call_rcu_lazy() will make use of lower bits in the pointer; 215 * - the structure shares storage space in struct page with @compound_head, 216 * which encode PageTail() in bit 0. The guarantee is needed to avoid 217 * false-positive PageTail(). 218 */ 219struct callback_head { 220 struct callback_head *next; 221 void (*func)(struct callback_head *head); 222} __attribute__((aligned(sizeof(void *)))); 223#define rcu_head callback_head 224 225typedef void (*rcu_callback_t)(struct rcu_head *head); 226typedef void (*call_rcu_func_t)(struct rcu_head *head, rcu_callback_t func); 227 228#endif /* __ASSEMBLY__ */ 229#endif /* _LINUX_TYPES_H */ 230