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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
418b2977 LR |
2 | /* |
3 | * This header has been modifies to remove definitions of types that | |
4 | * are defined in standard userspace headers or are problematic for some | |
5 | * other reason. | |
6 | */ | |
7 | ||
8 | #ifndef _LINUX_TYPES_H | |
9 | #define _LINUX_TYPES_H | |
10 | ||
11 | #define __EXPORTED_HEADERS__ | |
12 | #include <uapi/linux/types.h> | |
13 | ||
14 | #ifndef __ASSEMBLY__ | |
15 | ||
16 | #define DECLARE_BITMAP(name, bits) \ | |
17 | unsigned long name[BITS_TO_LONGS(bits)] | |
18 | ||
19 | typedef __u32 __kernel_dev_t; | |
20 | ||
21 | /* bsd */ | |
22 | typedef unsigned char u_char; | |
23 | typedef unsigned short u_short; | |
24 | typedef unsigned int u_int; | |
25 | typedef unsigned long u_long; | |
26 | ||
27 | /* sysv */ | |
28 | typedef unsigned char unchar; | |
29 | typedef unsigned short ushort; | |
30 | typedef unsigned int uint; | |
31 | typedef unsigned long ulong; | |
32 | ||
33 | #ifndef __BIT_TYPES_DEFINED__ | |
34 | #define __BIT_TYPES_DEFINED__ | |
35 | ||
36 | typedef __u8 u_int8_t; | |
37 | typedef __s8 int8_t; | |
38 | typedef __u16 u_int16_t; | |
39 | typedef __s16 int16_t; | |
40 | typedef __u32 u_int32_t; | |
41 | typedef __s32 int32_t; | |
42 | ||
43 | #endif /* !(__BIT_TYPES_DEFINED__) */ | |
44 | ||
45 | typedef __u8 uint8_t; | |
46 | typedef __u16 uint16_t; | |
47 | typedef __u32 uint32_t; | |
48 | ||
49 | /* this is a special 64bit data type that is 8-byte aligned */ | |
50 | #define aligned_u64 __u64 __attribute__((aligned(8))) | |
51 | #define aligned_be64 __be64 __attribute__((aligned(8))) | |
52 | #define aligned_le64 __le64 __attribute__((aligned(8))) | |
53 | ||
54 | /** | |
55 | * The type used for indexing onto a disc or disc partition. | |
56 | * | |
57 | * Linux always considers sectors to be 512 bytes long independently | |
58 | * of the devices real block size. | |
59 | * | |
60 | * blkcnt_t is the type of the inode's block count. | |
61 | */ | |
62 | #ifdef CONFIG_LBDAF | |
63 | typedef u64 sector_t; | |
64 | #else | |
65 | typedef unsigned long sector_t; | |
66 | #endif | |
67 | ||
68 | /* | |
69 | * The type of an index into the pagecache. | |
70 | */ | |
71 | #define pgoff_t unsigned long | |
72 | ||
73 | /* | |
74 | * A dma_addr_t can hold any valid DMA address, i.e., any address returned | |
75 | * by the DMA API. | |
76 | * | |
77 | * If the DMA API only uses 32-bit addresses, dma_addr_t need only be 32 | |
78 | * bits wide. Bus addresses, e.g., PCI BARs, may be wider than 32 bits, | |
79 | * but drivers do memory-mapped I/O to ioremapped kernel virtual addresses, | |
80 | * so they don't care about the size of the actual bus addresses. | |
81 | */ | |
82 | #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT | |
83 | typedef u64 dma_addr_t; | |
84 | #else | |
85 | typedef u32 dma_addr_t; | |
86 | #endif | |
87 | ||
88 | #ifdef CONFIG_PHYS_ADDR_T_64BIT | |
89 | typedef u64 phys_addr_t; | |
90 | #else | |
91 | typedef u32 phys_addr_t; | |
92 | #endif | |
93 | ||
94 | typedef phys_addr_t resource_size_t; | |
95 | ||
96 | /* | |
97 | * This type is the placeholder for a hardware interrupt number. It has to be | |
98 | * big enough to enclose whatever representation is used by a given platform. | |
99 | */ | |
100 | typedef unsigned long irq_hw_number_t; | |
101 | ||
102 | typedef struct { | |
103 | int counter; | |
104 | } atomic_t; | |
105 | ||
106 | #ifdef CONFIG_64BIT | |
107 | typedef struct { | |
108 | long counter; | |
109 | } atomic64_t; | |
110 | #endif | |
111 | ||
112 | struct list_head { | |
113 | struct list_head *next, *prev; | |
114 | }; | |
115 | ||
116 | struct hlist_head { | |
117 | struct hlist_node *first; | |
118 | }; | |
119 | ||
120 | struct hlist_node { | |
121 | struct hlist_node *next, **pprev; | |
122 | }; | |
123 | ||
124 | /** | |
125 | * struct callback_head - callback structure for use with RCU and task_work | |
126 | * @next: next update requests in a list | |
127 | * @func: actual update function to call after the grace period. | |
128 | * | |
129 | * The struct is aligned to size of pointer. On most architectures it happens | |
130 | * naturally due ABI requirements, but some architectures (like CRIS) have | |
131 | * weird ABI and we need to ask it explicitly. | |
132 | * | |
133 | * The alignment is required to guarantee that bits 0 and 1 of @next will be | |
134 | * clear under normal conditions -- as long as we use call_rcu(), | |
135 | * call_rcu_bh(), call_rcu_sched(), or call_srcu() to queue callback. | |
136 | * | |
137 | * This guarantee is important for few reasons: | |
138 | * - future call_rcu_lazy() will make use of lower bits in the pointer; | |
139 | * - the structure shares storage spacer in struct page with @compound_head, | |
140 | * which encode PageTail() in bit 0. The guarantee is needed to avoid | |
141 | * false-positive PageTail(). | |
142 | */ | |
143 | struct callback_head { | |
144 | struct callback_head *next; | |
145 | void (*func)(struct callback_head *head); | |
146 | } __attribute__((aligned(sizeof(void *)))); | |
147 | #define rcu_head callback_head | |
148 | ||
149 | typedef void (*rcu_callback_t)(struct rcu_head *head); | |
150 | typedef void (*call_rcu_func_t)(struct rcu_head *head, rcu_callback_t func); | |
151 | ||
152 | /* clocksource cycle base type */ | |
153 | typedef u64 cycle_t; | |
154 | ||
155 | #endif /* __ASSEMBLY__ */ | |
156 | #endif /* _LINUX_TYPES_H */ |