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