1 /* SPDX-License-Identifier: GPL-2.0 */
5 #define __EXPORTED_HEADERS__
6 #include <uapi/linux/types.h>
10 #define DECLARE_BITMAP(name,bits) \
11 unsigned long name[BITS_TO_LONGS(bits)]
13 typedef __u32 __kernel_dev_t;
15 typedef __kernel_fd_set fd_set;
16 typedef __kernel_dev_t dev_t;
17 typedef __kernel_ino_t ino_t;
18 typedef __kernel_mode_t mode_t;
19 typedef unsigned short umode_t;
20 typedef __u32 nlink_t;
21 typedef __kernel_off_t off_t;
22 typedef __kernel_pid_t pid_t;
23 typedef __kernel_daddr_t daddr_t;
24 typedef __kernel_key_t key_t;
25 typedef __kernel_suseconds_t suseconds_t;
26 typedef __kernel_timer_t timer_t;
27 typedef __kernel_clockid_t clockid_t;
28 typedef __kernel_mqd_t mqd_t;
32 typedef __kernel_uid32_t uid_t;
33 typedef __kernel_gid32_t gid_t;
34 typedef __kernel_uid16_t uid16_t;
35 typedef __kernel_gid16_t gid16_t;
37 typedef unsigned long uintptr_t;
39 #ifdef CONFIG_HAVE_UID16
40 /* This is defined by include/asm-{arch}/posix_types.h */
41 typedef __kernel_old_uid_t old_uid_t;
42 typedef __kernel_old_gid_t old_gid_t;
43 #endif /* CONFIG_UID16 */
46 typedef __kernel_loff_t loff_t;
50 * The following typedefs are also protected by individual ifdefs for
55 typedef __kernel_size_t size_t;
60 typedef __kernel_ssize_t ssize_t;
65 typedef __kernel_ptrdiff_t ptrdiff_t;
70 typedef __kernel_time_t time_t;
75 typedef __kernel_clock_t clock_t;
80 typedef __kernel_caddr_t caddr_t;
84 typedef unsigned char u_char;
85 typedef unsigned short u_short;
86 typedef unsigned int u_int;
87 typedef unsigned long u_long;
90 typedef unsigned char unchar;
91 typedef unsigned short ushort;
92 typedef unsigned int uint;
93 typedef unsigned long ulong;
95 #ifndef __BIT_TYPES_DEFINED__
96 #define __BIT_TYPES_DEFINED__
98 typedef __u8 u_int8_t;
100 typedef __u16 u_int16_t;
101 typedef __s16 int16_t;
102 typedef __u32 u_int32_t;
103 typedef __s32 int32_t;
105 #endif /* !(__BIT_TYPES_DEFINED__) */
107 typedef __u8 uint8_t;
108 typedef __u16 uint16_t;
109 typedef __u32 uint32_t;
111 #if defined(__GNUC__)
112 typedef __u64 uint64_t;
113 typedef __u64 u_int64_t;
114 typedef __s64 int64_t;
117 /* this is a special 64bit data type that is 8-byte aligned */
118 #define aligned_u64 __u64 __attribute__((aligned(8)))
119 #define aligned_be64 __be64 __attribute__((aligned(8)))
120 #define aligned_le64 __le64 __attribute__((aligned(8)))
123 * The type used for indexing onto a disc or disc partition.
125 * Linux always considers sectors to be 512 bytes long independently
126 * of the devices real block size.
128 * blkcnt_t is the type of the inode's block count.
131 typedef u64 sector_t;
132 typedef u64 blkcnt_t;
134 typedef unsigned long sector_t;
135 typedef unsigned long blkcnt_t;
139 * The type of an index into the pagecache.
141 #define pgoff_t unsigned long
144 * A dma_addr_t can hold any valid DMA address, i.e., any address returned
147 * If the DMA API only uses 32-bit addresses, dma_addr_t need only be 32
148 * bits wide. Bus addresses, e.g., PCI BARs, may be wider than 32 bits,
149 * but drivers do memory-mapped I/O to ioremapped kernel virtual addresses,
150 * so they don't care about the size of the actual bus addresses.
152 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
153 typedef u64 dma_addr_t;
155 typedef u32 dma_addr_t;
158 typedef unsigned __bitwise gfp_t;
159 typedef unsigned __bitwise fmode_t;
161 #ifdef CONFIG_PHYS_ADDR_T_64BIT
162 typedef u64 phys_addr_t;
164 typedef u32 phys_addr_t;
167 typedef phys_addr_t resource_size_t;
170 * This type is the placeholder for a hardware interrupt number. It has to be
171 * big enough to enclose whatever representation is used by a given platform.
173 typedef unsigned long irq_hw_number_t;
186 struct list_head *next, *prev;
190 struct hlist_node *first;
194 struct hlist_node *next, **pprev;
198 __kernel_daddr_t f_tfree;
199 __kernel_ino_t f_tinode;
205 * struct callback_head - callback structure for use with RCU and task_work
206 * @next: next update requests in a list
207 * @func: actual update function to call after the grace period.
209 * The struct is aligned to size of pointer. On most architectures it happens
210 * naturally due ABI requirements, but some architectures (like CRIS) have
211 * weird ABI and we need to ask it explicitly.
213 * The alignment is required to guarantee that bit 0 of @next will be
214 * clear under normal conditions -- as long as we use call_rcu(),
215 * call_rcu_bh(), call_rcu_sched(), or call_srcu() to queue callback.
217 * This guarantee is important for few reasons:
218 * - future call_rcu_lazy() will make use of lower bits in the pointer;
219 * - the structure shares storage spacer in struct page with @compound_head,
220 * which encode PageTail() in bit 0. The guarantee is needed to avoid
221 * false-positive PageTail().
223 struct callback_head {
224 struct callback_head *next;
225 void (*func)(struct callback_head *head);
226 } __attribute__((aligned(sizeof(void *))));
227 #define rcu_head callback_head
229 typedef void (*rcu_callback_t)(struct rcu_head *head);
230 typedef void (*call_rcu_func_t)(struct rcu_head *head, rcu_callback_t func);
232 #endif /* __ASSEMBLY__ */
233 #endif /* _LINUX_TYPES_H */