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/**
124 * The type used for indexing onto a disc or disc partition.
125 *
126 * Linux always considers sectors to be 512 bytes long independently
127 * of the devices real block size.
128 *
129 * blkcnt_t is the type of the inode's block count.
130 */
131typedef u64 sector_t;
132typedef u64 blkcnt_t;
133
134/*
135 * The type of an index into the pagecache.
136 */
137#define pgoff_t unsigned long
138
139/*
140 * A dma_addr_t can hold any valid DMA address, i.e., any address returned
141 * by the DMA API.
142 *
143 * If the DMA API only uses 32-bit addresses, dma_addr_t need only be 32
144 * bits wide. Bus addresses, e.g., PCI BARs, may be wider than 32 bits,
145 * but drivers do memory-mapped I/O to ioremapped kernel virtual addresses,
146 * so they don't care about the size of the actual bus addresses.
147 */
148#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
149typedef u64 dma_addr_t;
150#else
151typedef u32 dma_addr_t;
152#endif
153
154typedef unsigned int __bitwise gfp_t;
155typedef unsigned int __bitwise slab_flags_t;
156typedef unsigned int __bitwise fmode_t;
157
158#ifdef CONFIG_PHYS_ADDR_T_64BIT
159typedef u64 phys_addr_t;
160#else
161typedef u32 phys_addr_t;
162#endif
163
164typedef phys_addr_t resource_size_t;
165
166/*
167 * This type is the placeholder for a hardware interrupt number. It has to be
168 * big enough to enclose whatever representation is used by a given platform.
169 */
170typedef unsigned long irq_hw_number_t;
171
172typedef struct {
173 int counter;
174} atomic_t;
175
176#define ATOMIC_INIT(i) { (i) }
177
178#ifdef CONFIG_64BIT
179typedef struct {
180 s64 counter;
181} atomic64_t;
182#endif
183
184typedef struct {
185 atomic_t refcnt;
186} rcuref_t;
187
188#define RCUREF_INIT(i) { .refcnt = ATOMIC_INIT(i - 1) }
189
190struct list_head {
191 struct list_head *next, *prev;
192};
193
194struct hlist_head {
195 struct hlist_node *first;
196};
197
198struct hlist_node {
199 struct hlist_node *next, **pprev;
200};
201
202struct ustat {
203 __kernel_daddr_t f_tfree;
204#ifdef CONFIG_ARCH_32BIT_USTAT_F_TINODE
205 unsigned int f_tinode;
206#else
207 unsigned long f_tinode;
208#endif
209 char f_fname[6];
210 char f_fpack[6];
211};
212
213/**
214 * struct callback_head - callback structure for use with RCU and task_work
215 * @next: next update requests in a list
216 * @func: actual update function to call after the grace period.
217 *
218 * The struct is aligned to size of pointer. On most architectures it happens
219 * naturally due ABI requirements, but some architectures (like CRIS) have
220 * weird ABI and we need to ask it explicitly.
221 *
222 * The alignment is required to guarantee that bit 0 of @next will be
223 * clear under normal conditions -- as long as we use call_rcu() or
224 * call_srcu() to queue the callback.
225 *
226 * This guarantee is important for few reasons:
227 * - future call_rcu_lazy() will make use of lower bits in the pointer;
228 * - the structure shares storage space in struct page with @compound_head,
229 * which encode PageTail() in bit 0. The guarantee is needed to avoid
230 * false-positive PageTail().
231 */
232struct callback_head {
233 struct callback_head *next;
234 void (*func)(struct callback_head *head);
235} __attribute__((aligned(sizeof(void *))));
236#define rcu_head callback_head
237
238typedef void (*rcu_callback_t)(struct rcu_head *head);
239typedef void (*call_rcu_func_t)(struct rcu_head *head, rcu_callback_t func);
240
241typedef void (*swap_r_func_t)(void *a, void *b, int size, const void *priv);
242typedef void (*swap_func_t)(void *a, void *b, int size);
243
244typedef int (*cmp_r_func_t)(const void *a, const void *b, const void *priv);
245typedef int (*cmp_func_t)(const void *a, const void *b);
246
247#endif /* __ASSEMBLY__ */
248#endif /* _LINUX_TYPES_H */
249

source code of linux/include/linux/types.h