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TOMOYO Linux Cross Reference
Linux/include/linux/types.h

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  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 typedef __u32 __kernel_dev_t;
 14 
 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;
 29 
 30 typedef _Bool                   bool;
 31 
 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;
 36 
 37 typedef unsigned long           uintptr_t;
 38 
 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 */
 44 
 45 #if defined(__GNUC__)
 46 typedef __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
 55 typedef __kernel_size_t         size_t;
 56 #endif
 57 
 58 #ifndef _SSIZE_T
 59 #define _SSIZE_T
 60 typedef __kernel_ssize_t        ssize_t;
 61 #endif
 62 
 63 #ifndef _PTRDIFF_T
 64 #define _PTRDIFF_T
 65 typedef __kernel_ptrdiff_t      ptrdiff_t;
 66 #endif
 67 
 68 #ifndef _TIME_T
 69 #define _TIME_T
 70 typedef __kernel_time_t         time_t;
 71 #endif
 72 
 73 #ifndef _CLOCK_T
 74 #define _CLOCK_T
 75 typedef __kernel_clock_t        clock_t;
 76 #endif
 77 
 78 #ifndef _CADDR_T
 79 #define _CADDR_T
 80 typedef __kernel_caddr_t        caddr_t;
 81 #endif
 82 
 83 /* bsd */
 84 typedef unsigned char           u_char;
 85 typedef unsigned short          u_short;
 86 typedef unsigned int            u_int;
 87 typedef unsigned long           u_long;
 88 
 89 /* sysv */
 90 typedef unsigned char           unchar;
 91 typedef unsigned short          ushort;
 92 typedef unsigned int            uint;
 93 typedef unsigned long           ulong;
 94 
 95 #ifndef __BIT_TYPES_DEFINED__
 96 #define __BIT_TYPES_DEFINED__
 97 
 98 typedef         __u8            u_int8_t;
 99 typedef         __s8            int8_t;
100 typedef         __u16           u_int16_t;
101 typedef         __s16           int16_t;
102 typedef         __u32           u_int32_t;
103 typedef         __s32           int32_t;
104 
105 #endif /* !(__BIT_TYPES_DEFINED__) */
106 
107 typedef         __u8            uint8_t;
108 typedef         __u16           uint16_t;
109 typedef         __u32           uint32_t;
110 
111 #if defined(__GNUC__)
112 typedef         __u64           uint64_t;
113 typedef         __u64           u_int64_t;
114 typedef         __s64           int64_t;
115 #endif
116 
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)))
121 
122 /**
123  * The type used for indexing onto a disc or disc partition.
124  *
125  * Linux always considers sectors to be 512 bytes long independently
126  * of the devices real block size.
127  *
128  * blkcnt_t is the type of the inode's block count.
129  */
130 #ifdef CONFIG_LBDAF
131 typedef u64 sector_t;
132 typedef u64 blkcnt_t;
133 #else
134 typedef unsigned long sector_t;
135 typedef unsigned long blkcnt_t;
136 #endif
137 
138 /*
139  * The type of an index into the pagecache.
140  */
141 #define pgoff_t unsigned long
142 
143 /*
144  * A dma_addr_t can hold any valid DMA address, i.e., any address returned
145  * by the DMA API.
146  *
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.
151  */
152 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
153 typedef u64 dma_addr_t;
154 #else
155 typedef u32 dma_addr_t;
156 #endif
157 
158 typedef unsigned __bitwise gfp_t;
159 typedef unsigned __bitwise slab_flags_t;
160 typedef unsigned __bitwise fmode_t;
161 
162 #ifdef CONFIG_PHYS_ADDR_T_64BIT
163 typedef u64 phys_addr_t;
164 #else
165 typedef u32 phys_addr_t;
166 #endif
167 
168 typedef phys_addr_t resource_size_t;
169 
170 /*
171  * This type is the placeholder for a hardware interrupt number. It has to be
172  * big enough to enclose whatever representation is used by a given platform.
173  */
174 typedef unsigned long irq_hw_number_t;
175 
176 typedef struct {
177         int counter;
178 } atomic_t;
179 
180 #ifdef CONFIG_64BIT
181 typedef struct {
182         long counter;
183 } atomic64_t;
184 #endif
185 
186 struct list_head {
187         struct list_head *next, *prev;
188 };
189 
190 struct hlist_head {
191         struct hlist_node *first;
192 };
193 
194 struct hlist_node {
195         struct hlist_node *next, **pprev;
196 };
197 
198 struct ustat {
199         __kernel_daddr_t        f_tfree;
200         __kernel_ino_t          f_tinode;
201         char                    f_fname[6];
202         char                    f_fpack[6];
203 };
204 
205 /**
206  * struct callback_head - callback structure for use with RCU and task_work
207  * @next: next update requests in a list
208  * @func: actual update function to call after the grace period.
209  *
210  * The struct is aligned to size of pointer. On most architectures it happens
211  * naturally due ABI requirements, but some architectures (like CRIS) have
212  * weird ABI and we need to ask it explicitly.
213  *
214  * The alignment is required to guarantee that bit 0 of @next will be
215  * clear under normal conditions -- as long as we use call_rcu(),
216  * call_rcu_bh(), call_rcu_sched(), or call_srcu() to queue callback.
217  *
218  * This guarantee is important for few reasons:
219  *  - future call_rcu_lazy() will make use of lower bits in the pointer;
220  *  - the structure shares storage spacer in struct page with @compound_head,
221  *    which encode PageTail() in bit 0. The guarantee is needed to avoid
222  *    false-positive PageTail().
223  */
224 struct callback_head {
225         struct callback_head *next;
226         void (*func)(struct callback_head *head);
227 } __attribute__((aligned(sizeof(void *))));
228 #define rcu_head callback_head
229 
230 typedef void (*rcu_callback_t)(struct rcu_head *head);
231 typedef void (*call_rcu_func_t)(struct rcu_head *head, rcu_callback_t func);
232 
233 #endif /*  __ASSEMBLY__ */
234 #endif /* _LINUX_TYPES_H */
235 

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