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 arch/{arch}/include/asm/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;
95typedef unsigned long long ullong;
96
97#ifndef __BIT_TYPES_DEFINED__
98#define __BIT_TYPES_DEFINED__
99
100typedef u8 u_int8_t;
101typedef s8 int8_t;
102typedef u16 u_int16_t;
103typedef s16 int16_t;
104typedef u32 u_int32_t;
105typedef s32 int32_t;
106
107#endif /* !(__BIT_TYPES_DEFINED__) */
108
109typedef u8 uint8_t;
110typedef u16 uint16_t;
111typedef u32 uint32_t;
112
113#if defined(__GNUC__)
114typedef u64 uint64_t;
115typedef u64 u_int64_t;
116typedef 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 */
126typedef 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 */
136typedef u64 sector_t;
137typedef u64 blkcnt_t;
138
139/* generic data direction definitions */
140#define READ 0
141#define WRITE 1
142
143/*
144 * The type of an index into the pagecache.
145 */
146#define pgoff_t unsigned long
147
148/*
149 * A dma_addr_t can hold any valid DMA address, i.e., any address returned
150 * by the DMA API.
151 *
152 * If the DMA API only uses 32-bit addresses, dma_addr_t need only be 32
153 * bits wide. Bus addresses, e.g., PCI BARs, may be wider than 32 bits,
154 * but drivers do memory-mapped I/O to ioremapped kernel virtual addresses,
155 * so they don't care about the size of the actual bus addresses.
156 */
157#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
158typedef u64 dma_addr_t;
159#else
160typedef u32 dma_addr_t;
161#endif
162
163typedef unsigned int __bitwise gfp_t;
164typedef unsigned int __bitwise slab_flags_t;
165typedef unsigned int __bitwise fmode_t;
166
167#ifdef CONFIG_PHYS_ADDR_T_64BIT
168typedef u64 phys_addr_t;
169#else
170typedef u32 phys_addr_t;
171#endif
172
173typedef phys_addr_t resource_size_t;
174
175/*
176 * This type is the placeholder for a hardware interrupt number. It has to be
177 * big enough to enclose whatever representation is used by a given platform.
178 */
179typedef unsigned long irq_hw_number_t;
180
181typedef struct {
182 int counter;
183} atomic_t;
184
185#define ATOMIC_INIT(i) { (i) }
186
187#ifdef CONFIG_64BIT
188typedef struct {
189 s64 counter;
190} atomic64_t;
191#endif
192
193typedef struct {
194 atomic_t refcnt;
195} rcuref_t;
196
197#define RCUREF_INIT(i) { .refcnt = ATOMIC_INIT(i - 1) }
198
199struct list_head {
200 struct list_head *next, *prev;
201};
202
203struct hlist_head {
204 struct hlist_node *first;
205};
206
207struct hlist_node {
208 struct hlist_node *next, **pprev;
209};
210
211struct ustat {
212 __kernel_daddr_t f_tfree;
213#ifdef CONFIG_ARCH_32BIT_USTAT_F_TINODE
214 unsigned int f_tinode;
215#else
216 unsigned long f_tinode;
217#endif
218 char f_fname[6];
219 char f_fpack[6];
220};
221
222/**
223 * struct callback_head - callback structure for use with RCU and task_work
224 * @next: next update requests in a list
225 * @func: actual update function to call after the grace period.
226 *
227 * The struct is aligned to size of pointer. On most architectures it happens
228 * naturally due ABI requirements, but some architectures (like CRIS) have
229 * weird ABI and we need to ask it explicitly.
230 *
231 * The alignment is required to guarantee that bit 0 of @next will be
232 * clear under normal conditions -- as long as we use call_rcu() or
233 * call_srcu() to queue the callback.
234 *
235 * This guarantee is important for few reasons:
236 * - future call_rcu_lazy() will make use of lower bits in the pointer;
237 * - the structure shares storage space in struct page with @compound_head,
238 * which encode PageTail() in bit 0. The guarantee is needed to avoid
239 * false-positive PageTail().
240 */
241struct callback_head {
242 struct callback_head *next;
243 void (*func)(struct callback_head *head);
244} __attribute__((aligned(sizeof(void *))));
245#define rcu_head callback_head
246
247typedef void (*rcu_callback_t)(struct rcu_head *head);
248typedef void (*call_rcu_func_t)(struct rcu_head *head, rcu_callback_t func);
249
250typedef void (*swap_r_func_t)(void *a, void *b, int size, const void *priv);
251typedef void (*swap_func_t)(void *a, void *b, int size);
252
253typedef int (*cmp_r_func_t)(const void *a, const void *b, const void *priv);
254typedef int (*cmp_func_t)(const void *a, const void *b);
255
256/*
257 * rcuwait provides a way of blocking and waking up a single
258 * task in an rcu-safe manner.
259 *
260 * The only time @task is non-nil is when a user is blocked (or
261 * checking if it needs to) on a condition, and reset as soon as we
262 * know that the condition has succeeded and are awoken.
263 */
264struct rcuwait {
265 struct task_struct __rcu *task;
266};
267
268#endif /* __ASSEMBLY__ */
269#endif /* _LINUX_TYPES_H */
270

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

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