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_ulong_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 _CLOCK_T
69#define _CLOCK_T
70typedef __kernel_clock_t clock_t;
71#endif
72
73#ifndef _CADDR_T
74#define _CADDR_T
75typedef __kernel_caddr_t caddr_t;
76#endif
77
78/* bsd */
79typedef unsigned char u_char;
80typedef unsigned short u_short;
81typedef unsigned int u_int;
82typedef unsigned long u_long;
83
84/* sysv */
85typedef unsigned char unchar;
86typedef unsigned short ushort;
87typedef unsigned int uint;
88typedef unsigned long ulong;
89
90#ifndef __BIT_TYPES_DEFINED__
91#define __BIT_TYPES_DEFINED__
92
93typedef u8 u_int8_t;
94typedef s8 int8_t;
95typedef u16 u_int16_t;
96typedef s16 int16_t;
97typedef u32 u_int32_t;
98typedef s32 int32_t;
99
100#endif /* !(__BIT_TYPES_DEFINED__) */
101
102typedef u8 uint8_t;
103typedef u16 uint16_t;
104typedef u32 uint32_t;
105
106#if defined(__GNUC__)
107typedef u64 uint64_t;
108typedef u64 u_int64_t;
109typedef s64 int64_t;
110#endif
111
112/* this is a special 64bit data type that is 8-byte aligned */
113#define aligned_u64 __aligned_u64
114#define aligned_be64 __aligned_be64
115#define aligned_le64 __aligned_le64
116
117/**
118 * The type used for indexing onto a disc or disc partition.
119 *
120 * Linux always considers sectors to be 512 bytes long independently
121 * of the devices real block size.
122 *
123 * blkcnt_t is the type of the inode's block count.
124 */
125typedef u64 sector_t;
126typedef u64 blkcnt_t;
127
128/*
129 * The type of an index into the pagecache.
130 */
131#define pgoff_t unsigned long
132
133/*
134 * A dma_addr_t can hold any valid DMA address, i.e., any address returned
135 * by the DMA API.
136 *
137 * If the DMA API only uses 32-bit addresses, dma_addr_t need only be 32
138 * bits wide. Bus addresses, e.g., PCI BARs, may be wider than 32 bits,
139 * but drivers do memory-mapped I/O to ioremapped kernel virtual addresses,
140 * so they don't care about the size of the actual bus addresses.
141 */
142#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
143typedef u64 dma_addr_t;
144#else
145typedef u32 dma_addr_t;
146#endif
147
148typedef unsigned int __bitwise gfp_t;
149typedef unsigned int __bitwise slab_flags_t;
150typedef unsigned int __bitwise fmode_t;
151
152#ifdef CONFIG_PHYS_ADDR_T_64BIT
153typedef u64 phys_addr_t;
154#else
155typedef u32 phys_addr_t;
156#endif
157
158typedef phys_addr_t resource_size_t;
159
160/*
161 * This type is the placeholder for a hardware interrupt number. It has to be
162 * big enough to enclose whatever representation is used by a given platform.
163 */
164typedef unsigned long irq_hw_number_t;
165
166typedef struct {
167 int counter;
168} atomic_t;
169
170#define ATOMIC_INIT(i) { (i) }
171
172#ifdef CONFIG_64BIT
173typedef struct {
174 s64 counter;
175} atomic64_t;
176#endif
177
178struct list_head {
179 struct list_head *next, *prev;
180};
181
182struct hlist_head {
183 struct hlist_node *first;
184};
185
186struct hlist_node {
187 struct hlist_node *next, **pprev;
188};
189
190struct ustat {
191 __kernel_daddr_t f_tfree;
192#ifdef CONFIG_ARCH_32BIT_USTAT_F_TINODE
193 unsigned int f_tinode;
194#else
195 unsigned long f_tinode;
196#endif
197 char f_fname[6];
198 char f_fpack[6];
199};
200
201/**
202 * struct callback_head - callback structure for use with RCU and task_work
203 * @next: next update requests in a list
204 * @func: actual update function to call after the grace period.
205 *
206 * The struct is aligned to size of pointer. On most architectures it happens
207 * naturally due ABI requirements, but some architectures (like CRIS) have
208 * weird ABI and we need to ask it explicitly.
209 *
210 * The alignment is required to guarantee that bit 0 of @next will be
211 * clear under normal conditions -- as long as we use call_rcu() or
212 * call_srcu() to queue the callback.
213 *
214 * This guarantee is important for few reasons:
215 * - future call_rcu_lazy() will make use of lower bits in the pointer;
216 * - the structure shares storage space in struct page with @compound_head,
217 * which encode PageTail() in bit 0. The guarantee is needed to avoid
218 * false-positive PageTail().
219 */
220struct callback_head {
221 struct callback_head *next;
222 void (*func)(struct callback_head *head);
223} __attribute__((aligned(sizeof(void *))));
224#define rcu_head callback_head
225
226typedef void (*rcu_callback_t)(struct rcu_head *head);
227typedef void (*call_rcu_func_t)(struct rcu_head *head, rcu_callback_t func);
228
229typedef void (*swap_r_func_t)(void *a, void *b, int size, const void *priv);
230typedef void (*swap_func_t)(void *a, void *b, int size);
231
232typedef int (*cmp_r_func_t)(const void *a, const void *b, const void *priv);
233typedef int (*cmp_func_t)(const void *a, const void *b);
234
235#endif /* __ASSEMBLY__ */
236#endif /* _LINUX_TYPES_H */
237

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