tools/testing/selftests/rcutorture/formal/srcu-cbmc/include/linux/types.h

   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
  19 typedef __u32 __kernel_dev_t;
  20
  21 /* bsd */
  22 typedef unsigned char           u_char;
  23 typedef unsigned short          u_short;
  24 typedef unsigned int            u_int;
  25 typedef unsigned long           u_long;
  26
  27 /* sysv */
  28 typedef unsigned char           unchar;
  29 typedef unsigned short          ushort;
  30 typedef unsigned int            uint;
  31 typedef unsigned long           ulong;
  32
  33 #ifndef __BIT_TYPES_DEFINED__
  34 #define __BIT_TYPES_DEFINED__
  35
  36 typedef         __u8            u_int8_t;
  37 typedef         __s8            int8_t;
  38 typedef         __u16           u_int16_t;
  39 typedef         __s16           int16_t;
  40 typedef         __u32           u_int32_t;
  41 typedef         __s32           int32_t;
  42
  43 #endif /* !(__BIT_TYPES_DEFINED__) */
  44
  45 typedef         __u8            uint8_t;
  46 typedef         __u16           uint16_t;
  47 typedef         __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 typedef 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
  79 typedef u64 dma_addr_t;
  80 #else
  81 typedef u32 dma_addr_t;
  82 #endif
  83
  84 #ifdef CONFIG_PHYS_ADDR_T_64BIT
  85 typedef u64 phys_addr_t;
  86 #else
  87 typedef u32 phys_addr_t;
  88 #endif
  89
  90 typedef 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  */
  96 typedef unsigned long irq_hw_number_t;
  97
  98 typedef struct {
  99         int counter;
 100 } atomic_t;
 101
 102 #ifdef CONFIG_64BIT
 103 typedef struct {
 104         long counter;
 105 } atomic64_t;
 106 #endif
 107
 108 struct list_head {
 109         struct list_head *next, *prev;
 110 };
 111
 112 struct hlist_head {
 113         struct hlist_node *first;
 114 };
 115
 116 struct 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  */
 139 struct 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
 145 typedef void (*rcu_callback_t)(struct rcu_head *head);
 146 typedef void (*call_rcu_func_t)(struct rcu_head *head, rcu_callback_t func);
 147
 148 /* clocksource cycle base type */
 149 typedef u64 cycle_t;
 150
 151 #endif /*  __ASSEMBLY__ */
 152 #endif /* _LINUX_TYPES_H */