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 __aligned_u64 119 #define aligned_be64 __aligned_be64 120 #define aligned_le64 __aligned_le64 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 typedef u64 sector_t; 131 typedef u64 blkcnt_t; 132 133 /* 134 * The type of an index into the pagecache. 135 */ 136 #define pgoff_t unsigned long 137 138 /* 139 * A dma_addr_t can hold any valid DMA address, i.e., any address returned 140 * by the DMA API. 141 * 142 * If the DMA API only uses 32-bit addresses, dma_addr_t need only be 32 143 * bits wide. Bus addresses, e.g., PCI BARs, may be wider than 32 bits, 144 * but drivers do memory-mapped I/O to ioremapped kernel virtual addresses, 145 * so they don't care about the size of the actual bus addresses. 146 */ 147 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT 148 typedef u64 dma_addr_t; 149 #else 150 typedef u32 dma_addr_t; 151 #endif 152 153 typedef unsigned int __bitwise gfp_t; 154 typedef unsigned int __bitwise slab_flags_t; 155 typedef unsigned int __bitwise fmode_t; 156 157 #ifdef CONFIG_PHYS_ADDR_T_64BIT 158 typedef u64 phys_addr_t; 159 #else 160 typedef u32 phys_addr_t; 161 #endif 162 163 typedef phys_addr_t resource_size_t; 164 165 /* 166 * This type is the placeholder for a hardware interrupt number. It has to be 167 * big enough to enclose whatever representation is used by a given platform. 168 */ 169 typedef unsigned long irq_hw_number_t; 170 171 typedef struct { 172 int counter; 173 } atomic_t; 174 175 #ifdef CONFIG_64BIT 176 typedef struct { 177 s64 counter; 178 } atomic64_t; 179 #endif 180 181 struct list_head { 182 struct list_head *next, *prev; 183 }; 184 185 struct hlist_head { 186 struct hlist_node *first; 187 }; 188 189 struct hlist_node { 190 struct hlist_node *next, **pprev; 191 }; 192 193 struct ustat { 194 __kernel_daddr_t f_tfree; 195 __kernel_ino_t f_tinode; 196 char f_fname[6]; 197 char f_fpack[6]; 198 }; 199 200 /** 201 * struct callback_head - callback structure for use with RCU and task_work 202 * @next: next update requests in a list 203 * @func: actual update function to call after the grace period. 204 * 205 * The struct is aligned to size of pointer. On most architectures it happens 206 * naturally due ABI requirements, but some architectures (like CRIS) have 207 * weird ABI and we need to ask it explicitly. 208 * 209 * The alignment is required to guarantee that bit 0 of @next will be 210 * clear under normal conditions -- as long as we use call_rcu() or 211 * call_srcu() to queue the callback. 212 * 213 * This guarantee is important for few reasons: 214 * - future call_rcu_lazy() will make use of lower bits in the pointer; 215 * - the structure shares storage space in struct page with @compound_head, 216 * which encode PageTail() in bit 0. The guarantee is needed to avoid 217 * false-positive PageTail(). 218 */ 219 struct callback_head { 220 struct callback_head *next; 221 void (*func)(struct callback_head *head); 222 } __attribute__((aligned(sizeof(void *)))); 223 #define rcu_head callback_head 224 225 typedef void (*rcu_callback_t)(struct rcu_head *head); 226 typedef void (*call_rcu_func_t)(struct rcu_head *head, rcu_callback_t func); 227 228 #endif /* __ASSEMBLY__ */ 229 #endif /* _LINUX_TYPES_H */ 230