summaryrefslogtreecommitdiff
path: root/include/linux/types.h
blob: d3021c87917953be758958fdf0fef4731702224c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_TYPES_H
#define _LINUX_TYPES_H

#define __EXPORTED_HEADERS__
#include <uapi/linux/types.h>

#ifndef __ASSEMBLY__

#define DECLARE_BITMAP(name,bits) \
	unsigned long name[BITS_TO_LONGS(bits)]

typedef u32 __kernel_dev_t;

typedef __kernel_fd_set		fd_set;
typedef __kernel_dev_t		dev_t;
typedef __kernel_ino_t		ino_t;
typedef __kernel_mode_t		mode_t;
typedef unsigned short		umode_t;
typedef u32			nlink_t;
typedef __kernel_off_t		off_t;
typedef __kernel_pid_t		pid_t;
typedef __kernel_daddr_t	daddr_t;
typedef __kernel_key_t		key_t;
typedef __kernel_suseconds_t	suseconds_t;
typedef __kernel_timer_t	timer_t;
typedef __kernel_clockid_t	clockid_t;
typedef __kernel_mqd_t		mqd_t;

typedef _Bool			bool;

typedef __kernel_uid32_t	uid_t;
typedef __kernel_gid32_t	gid_t;
typedef __kernel_uid16_t        uid16_t;
typedef __kernel_gid16_t        gid16_t;

typedef unsigned long		uintptr_t;

#ifdef CONFIG_HAVE_UID16
/* This is defined by include/asm-{arch}/posix_types.h */
typedef __kernel_old_uid_t	old_uid_t;
typedef __kernel_old_gid_t	old_gid_t;
#endif /* CONFIG_UID16 */

#if defined(__GNUC__)
typedef __kernel_loff_t		loff_t;
#endif

/*
 * The following typedefs are also protected by individual ifdefs for
 * historical reasons:
 */
#ifndef _SIZE_T
#define _SIZE_T
typedef __kernel_size_t		size_t;
#endif

#ifndef _SSIZE_T
#define _SSIZE_T
typedef __kernel_ssize_t	ssize_t;
#endif

#ifndef _PTRDIFF_T
#define _PTRDIFF_T
typedef __kernel_ptrdiff_t	ptrdiff_t;
#endif

#ifndef _CLOCK_T
#define _CLOCK_T
typedef __kernel_clock_t	clock_t;
#endif

#ifndef _CADDR_T
#define _CADDR_T
typedef __kernel_caddr_t	caddr_t;
#endif

/* bsd */
typedef unsigned char		u_char;
typedef unsigned short		u_short;
typedef unsigned int		u_int;
typedef unsigned long		u_long;

/* sysv */
typedef unsigned char		unchar;
typedef unsigned short		ushort;
typedef unsigned int		uint;
typedef unsigned long		ulong;

#ifndef __BIT_TYPES_DEFINED__
#define __BIT_TYPES_DEFINED__

typedef u8			u_int8_t;
typedef s8			int8_t;
typedef u16			u_int16_t;
typedef s16			int16_t;
typedef u32			u_int32_t;
typedef s32			int32_t;

#endif /* !(__BIT_TYPES_DEFINED__) */

typedef u8			uint8_t;
typedef u16			uint16_t;
typedef u32			uint32_t;

#if defined(__GNUC__)
typedef u64			uint64_t;
typedef u64			u_int64_t;
typedef s64			int64_t;
#endif

/* this is a special 64bit data type that is 8-byte aligned */
#define aligned_u64		__aligned_u64
#define aligned_be64		__aligned_be64
#define aligned_le64		__aligned_le64

/**
 * The type used for indexing onto a disc or disc partition.
 *
 * Linux always considers sectors to be 512 bytes long independently
 * of the devices real block size.
 *
 * blkcnt_t is the type of the inode's block count.
 */
typedef u64 sector_t;
typedef u64 blkcnt_t;

/*
 * The type of an index into the pagecache.
 */
#define pgoff_t unsigned long

/*
 * A dma_addr_t can hold any valid DMA address, i.e., any address returned
 * by the DMA API.
 *
 * If the DMA API only uses 32-bit addresses, dma_addr_t need only be 32
 * bits wide.  Bus addresses, e.g., PCI BARs, may be wider than 32 bits,
 * but drivers do memory-mapped I/O to ioremapped kernel virtual addresses,
 * so they don't care about the size of the actual bus addresses.
 */
#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
typedef u64 dma_addr_t;
#else
typedef u32 dma_addr_t;
#endif

typedef unsigned int __bitwise gfp_t;
typedef unsigned int __bitwise slab_flags_t;
typedef unsigned int __bitwise fmode_t;

#ifdef CONFIG_PHYS_ADDR_T_64BIT
typedef u64 phys_addr_t;
#else
typedef u32 phys_addr_t;
#endif

typedef phys_addr_t resource_size_t;

/*
 * This type is the placeholder for a hardware interrupt number. It has to be
 * big enough to enclose whatever representation is used by a given platform.
 */
typedef unsigned long irq_hw_number_t;

typedef struct {
	int counter;
} atomic_t;

#ifdef CONFIG_64BIT
typedef struct {
	s64 counter;
} atomic64_t;
#endif

struct list_head {
	struct list_head *next, *prev;
};

struct hlist_head {
	struct hlist_node *first;
};

struct hlist_node {
	struct hlist_node *next, **pprev;
};

struct ustat {
	__kernel_daddr_t	f_tfree;
	__kernel_ino_t		f_tinode;
	char			f_fname[6];
	char			f_fpack[6];
};

/**
 * struct callback_head - callback structure for use with RCU and task_work
 * @next: next update requests in a list
 * @func: actual update function to call after the grace period.
 *
 * The struct is aligned to size of pointer. On most architectures it happens
 * naturally due ABI requirements, but some architectures (like CRIS) have
 * weird ABI and we need to ask it explicitly.
 *
 * The alignment is required to guarantee that bit 0 of @next will be
 * clear under normal conditions -- as long as we use call_rcu() or
 * call_srcu() to queue the callback.
 *
 * This guarantee is important for few reasons:
 *  - future call_rcu_lazy() will make use of lower bits in the pointer;
 *  - the structure shares storage space in struct page with @compound_head,
 *    which encode PageTail() in bit 0. The guarantee is needed to avoid
 *    false-positive PageTail().
 */
struct callback_head {
	struct callback_head *next;
	void (*func)(struct callback_head *head);
} __attribute__((aligned(sizeof(void *))));
#define rcu_head callback_head

typedef void (*rcu_callback_t)(struct rcu_head *head);
typedef void (*call_rcu_func_t)(struct rcu_head *head, rcu_callback_t func);

typedef void (*swap_func_t)(void *a, void *b, int size);

typedef int (*cmp_r_func_t)(const void *a, const void *b, const void *priv);
typedef int (*cmp_func_t)(const void *a, const void *b);

#endif /*  __ASSEMBLY__ */
#endif /* _LINUX_TYPES_H */