1/* SPDX-License-Identifier: GPL-2.0 */ 2/* 3 * This header has been modifies to remove definitions of types that 4 * are defined in standard userspace headers or are problematic for some 5 * other reason. 6 */ 7 8#ifndef _LINUX_TYPES_H 9#define _LINUX_TYPES_H 10 11#define __EXPORTED_HEADERS__ 12#include <uapi/linux/types.h> 13 14#ifndef __ASSEMBLY__ 15 16#define DECLARE_BITMAP(name, bits) \ 17 unsigned long name[BITS_TO_LONGS(bits)] 18 19typedef __u32 __kernel_dev_t; 20 21/* bsd */ 22typedef unsigned char u_char; 23typedef unsigned short u_short; 24typedef unsigned int u_int; 25typedef unsigned long u_long; 26 27/* sysv */ 28typedef unsigned char unchar; 29typedef unsigned short ushort; 30typedef unsigned int uint; 31typedef unsigned long ulong; 32 33#ifndef __BIT_TYPES_DEFINED__ 34#define __BIT_TYPES_DEFINED__ 35 36typedef __u8 u_int8_t; 37typedef __s8 int8_t; 38typedef __u16 u_int16_t; 39typedef __s16 int16_t; 40typedef __u32 u_int32_t; 41typedef __s32 int32_t; 42 43#endif /* !(__BIT_TYPES_DEFINED__) */ 44 45typedef __u8 uint8_t; 46typedef __u16 uint16_t; 47typedef __u32 uint32_t; 48 49/* this is a special 64bit data type that is 8-byte aligned */ 50#define aligned_u64 __u64 __attribute__((aligned(8))) 51#define aligned_be64 __be64 __attribute__((aligned(8))) 52#define aligned_le64 __le64 __attribute__((aligned(8))) 53 54/** 55 * The type used for indexing onto a disc or disc partition. 56 * 57 * Linux always considers sectors to be 512 bytes long independently 58 * of the devices real block size. 59 * 60 * blkcnt_t is the type of the inode's block count. 61 */ 62#ifdef CONFIG_LBDAF 63typedef u64 sector_t; 64#else 65typedef unsigned long sector_t; 66#endif 67 68/* 69 * The type of an index into the pagecache. 70 */ 71#define pgoff_t unsigned long 72 73/* 74 * A dma_addr_t can hold any valid DMA address, i.e., any address returned 75 * by the DMA API. 76 * 77 * If the DMA API only uses 32-bit addresses, dma_addr_t need only be 32 78 * bits wide. Bus addresses, e.g., PCI BARs, may be wider than 32 bits, 79 * but drivers do memory-mapped I/O to ioremapped kernel virtual addresses, 80 * so they don't care about the size of the actual bus addresses. 81 */ 82#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT 83typedef u64 dma_addr_t; 84#else 85typedef u32 dma_addr_t; 86#endif 87 88#ifdef CONFIG_PHYS_ADDR_T_64BIT 89typedef u64 phys_addr_t; 90#else 91typedef u32 phys_addr_t; 92#endif 93 94typedef phys_addr_t resource_size_t; 95 96/* 97 * This type is the placeholder for a hardware interrupt number. It has to be 98 * big enough to enclose whatever representation is used by a given platform. 99 */ 100typedef unsigned long irq_hw_number_t; 101 102typedef struct { 103 int counter; 104} atomic_t; 105 106#ifdef CONFIG_64BIT 107typedef struct { 108 long counter; 109} atomic64_t; 110#endif 111 112struct list_head { 113 struct list_head *next, *prev; 114}; 115 116struct hlist_head { 117 struct hlist_node *first; 118}; 119 120struct hlist_node { 121 struct hlist_node *next, **pprev; 122}; 123 124/** 125 * struct callback_head - callback structure for use with RCU and task_work 126 * @next: next update requests in a list 127 * @func: actual update function to call after the grace period. 128 * 129 * The struct is aligned to size of pointer. On most architectures it happens 130 * naturally due ABI requirements, but some architectures (like CRIS) have 131 * weird ABI and we need to ask it explicitly. 132 * 133 * The alignment is required to guarantee that bits 0 and 1 of @next will be 134 * clear under normal conditions -- as long as we use call_rcu(), 135 * call_rcu_bh(), call_rcu_sched(), or call_srcu() to queue callback. 136 * 137 * This guarantee is important for few reasons: 138 * - future call_rcu_lazy() will make use of lower bits in the pointer; 139 * - the structure shares storage spacer in struct page with @compound_head, 140 * which encode PageTail() in bit 0. The guarantee is needed to avoid 141 * false-positive PageTail(). 142 */ 143struct callback_head { 144 struct callback_head *next; 145 void (*func)(struct callback_head *head); 146} __attribute__((aligned(sizeof(void *)))); 147#define rcu_head callback_head 148 149typedef void (*rcu_callback_t)(struct rcu_head *head); 150typedef void (*call_rcu_func_t)(struct rcu_head *head, rcu_callback_t func); 151 152/* clocksource cycle base type */ 153typedef u64 cycle_t; 154 155#endif /* __ASSEMBLY__ */ 156#endif /* _LINUX_TYPES_H */ 157