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 */ 62typedef u64 sector_t; 63 64/* 65 * The type of an index into the pagecache. 66 */ 67#define pgoff_t unsigned long 68 69/* 70 * A dma_addr_t can hold any valid DMA address, i.e., any address returned 71 * by the DMA API. 72 * 73 * If the DMA API only uses 32-bit addresses, dma_addr_t need only be 32 74 * bits wide. Bus addresses, e.g., PCI BARs, may be wider than 32 bits, 75 * but drivers do memory-mapped I/O to ioremapped kernel virtual addresses, 76 * so they don't care about the size of the actual bus addresses. 77 */ 78#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT 79typedef u64 dma_addr_t; 80#else 81typedef u32 dma_addr_t; 82#endif 83 84#ifdef CONFIG_PHYS_ADDR_T_64BIT 85typedef u64 phys_addr_t; 86#else 87typedef u32 phys_addr_t; 88#endif 89 90typedef phys_addr_t resource_size_t; 91 92/* 93 * This type is the placeholder for a hardware interrupt number. It has to be 94 * big enough to enclose whatever representation is used by a given platform. 95 */ 96typedef unsigned long irq_hw_number_t; 97 98typedef struct { 99 int counter; 100} atomic_t; 101 102#ifdef CONFIG_64BIT 103typedef struct { 104 long counter; 105} atomic64_t; 106#endif 107 108struct list_head { 109 struct list_head *next, *prev; 110}; 111 112struct hlist_head { 113 struct hlist_node *first; 114}; 115 116struct hlist_node { 117 struct hlist_node *next, **pprev; 118}; 119 120/** 121 * struct callback_head - callback structure for use with RCU and task_work 122 * @next: next update requests in a list 123 * @func: actual update function to call after the grace period. 124 * 125 * The struct is aligned to size of pointer. On most architectures it happens 126 * naturally due ABI requirements, but some architectures (like CRIS) have 127 * weird ABI and we need to ask it explicitly. 128 * 129 * The alignment is required to guarantee that bits 0 and 1 of @next will be 130 * clear under normal conditions -- as long as we use call_rcu() or 131 * call_srcu() to queue callback. 132 * 133 * This guarantee is important for few reasons: 134 * - future call_rcu_lazy() will make use of lower bits in the pointer; 135 * - the structure shares storage spacer in struct page with @compound_head, 136 * which encode PageTail() in bit 0. The guarantee is needed to avoid 137 * false-positive PageTail(). 138 */ 139struct callback_head { 140 struct callback_head *next; 141 void (*func)(struct callback_head *head); 142} __attribute__((aligned(sizeof(void *)))); 143#define rcu_head callback_head 144 145typedef void (*rcu_callback_t)(struct rcu_head *head); 146typedef void (*call_rcu_func_t)(struct rcu_head *head, rcu_callback_t func); 147 148/* clocksource cycle base type */ 149typedef u64 cycle_t; 150 151#endif /* __ASSEMBLY__ */ 152#endif /* _LINUX_TYPES_H */ 153