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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 _CLOCK_T
 69 #define _CLOCK_T
 70 typedef __kernel_clock_t        clock_t;
 71 #endif
 72 
 73 #ifndef _CADDR_T
 74 #define _CADDR_T
 75 typedef __kernel_caddr_t        caddr_t;
 76 #endif
 77 
 78 /* bsd */
 79 typedef unsigned char           u_char;
 80 typedef unsigned short          u_short;
 81 typedef unsigned int            u_int;
 82 typedef unsigned long           u_long;
 83 
 84 /* sysv */
 85 typedef unsigned char           unchar;
 86 typedef unsigned short          ushort;
 87 typedef unsigned int            uint;
 88 typedef unsigned long           ulong;
 89 
 90 #ifndef __BIT_TYPES_DEFINED__
 91 #define __BIT_TYPES_DEFINED__
 92 
 93 typedef u8                      u_int8_t;
 94 typedef s8                      int8_t;
 95 typedef u16                     u_int16_t;
 96 typedef s16                     int16_t;
 97 typedef u32                     u_int32_t;
 98 typedef s32                     int32_t;
 99 
100 #endif /* !(__BIT_TYPES_DEFINED__) */
101 
102 typedef u8                      uint8_t;
103 typedef u16                     uint16_t;
104 typedef u32                     uint32_t;
105 
106 #if defined(__GNUC__)
107 typedef u64                     uint64_t;
108 typedef u64                     u_int64_t;
109 typedef 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  */
125 typedef u64 sector_t;
126 typedef 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
143 typedef u64 dma_addr_t;
144 #else
145 typedef u32 dma_addr_t;
146 #endif
147 
148 typedef unsigned int __bitwise gfp_t;
149 typedef unsigned int __bitwise slab_flags_t;
150 typedef unsigned int __bitwise fmode_t;
151 
152 #ifdef CONFIG_PHYS_ADDR_T_64BIT
153 typedef u64 phys_addr_t;
154 #else
155 typedef u32 phys_addr_t;
156 #endif
157 
158 typedef 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  */
164 typedef unsigned long irq_hw_number_t;
165 
166 typedef struct {
167         int counter;
168 } atomic_t;
169 
170 #ifdef CONFIG_64BIT
171 typedef struct {
172         s64 counter;
173 } atomic64_t;
174 #endif
175 
176 struct list_head {
177         struct list_head *next, *prev;
178 };
179 
180 struct hlist_head {
181         struct hlist_node *first;
182 };
183 
184 struct hlist_node {
185         struct hlist_node *next, **pprev;
186 };
187 
188 struct ustat {
189         __kernel_daddr_t        f_tfree;
190         __kernel_ino_t          f_tinode;
191         char                    f_fname[6];
192         char                    f_fpack[6];
193 };
194 
195 /**
196  * struct callback_head - callback structure for use with RCU and task_work
197  * @next: next update requests in a list
198  * @func: actual update function to call after the grace period.
199  *
200  * The struct is aligned to size of pointer. On most architectures it happens
201  * naturally due ABI requirements, but some architectures (like CRIS) have
202  * weird ABI and we need to ask it explicitly.
203  *
204  * The alignment is required to guarantee that bit 0 of @next will be
205  * clear under normal conditions -- as long as we use call_rcu() or
206  * call_srcu() to queue the callback.
207  *
208  * This guarantee is important for few reasons:
209  *  - future call_rcu_lazy() will make use of lower bits in the pointer;
210  *  - the structure shares storage space in struct page with @compound_head,
211  *    which encode PageTail() in bit 0. The guarantee is needed to avoid
212  *    false-positive PageTail().
213  */
214 struct callback_head {
215         struct callback_head *next;
216         void (*func)(struct callback_head *head);
217 } __attribute__((aligned(sizeof(void *))));
218 #define rcu_head callback_head
219 
220 typedef void (*rcu_callback_t)(struct rcu_head *head);
221 typedef void (*call_rcu_func_t)(struct rcu_head *head, rcu_callback_t func);
222 
223 typedef void (*swap_func_t)(void *a, void *b, int size);
224 
225 typedef int (*cmp_r_func_t)(const void *a, const void *b, const void *priv);
226 typedef int (*cmp_func_t)(const void *a, const void *b);
227 
228 #endif /*  __ASSEMBLY__ */
229 #endif /* _LINUX_TYPES_H */
230 

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