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6527 | serge | 1 | #ifndef _LINUX_LIST_H |
2 | #define _LINUX_LIST_H |
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3 | |||
4 | |||
5 | /* |
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6 | * Simple doubly linked list implementation. |
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7 | * |
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8 | * Some of the internal functions ("__xxx") are useful when |
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9 | * manipulating whole lists rather than single entries, as |
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10 | * sometimes we already know the next/prev entries and we can |
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11 | * generate better code by using them directly rather than |
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12 | * using the generic single-entry routines. |
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13 | */ |
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14 | |||
15 | /** |
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16 | * container_of - cast a member of a structure out to the containing structure |
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17 | * @ptr: the pointer to the member. |
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18 | * @type: the type of the container struct this is embedded in. |
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19 | * @member: the name of the member within the struct. |
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20 | * |
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21 | */ |
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22 | #define container_of(ptr, type, member) ({ \ |
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23 | const typeof( ((type *)0)->member ) *__mptr = (ptr); \ |
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24 | (type *)( (char *)__mptr - offsetof(type,member) );}) |
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25 | |||
26 | #define LIST_POISON1 ((struct list_head*)0xFFFF0100) |
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27 | #define LIST_POISON2 ((struct list_head*)0xFFFF0200) |
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28 | |||
29 | #define prefetch(x) __builtin_prefetch(x) |
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30 | |||
31 | struct list_head { |
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32 | struct list_head *next, *prev; |
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33 | }; |
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34 | |||
35 | #define LIST_HEAD_INIT(name) { &(name), &(name) } |
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36 | |||
37 | #define LIST_HEAD(name) \ |
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38 | struct list_head name = LIST_HEAD_INIT(name) |
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39 | |||
40 | static inline void INIT_LIST_HEAD(struct list_head *list) |
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41 | { |
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42 | list->next = list; |
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43 | list->prev = list; |
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44 | } |
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45 | |||
46 | /* |
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47 | * Insert a new entry between two known consecutive entries. |
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48 | * |
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49 | * This is only for internal list manipulation where we know |
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50 | * the prev/next entries already! |
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51 | */ |
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52 | #ifndef CONFIG_DEBUG_LIST |
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53 | static inline void __list_add(struct list_head *new, |
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54 | struct list_head *prev, |
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55 | struct list_head *next) |
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56 | { |
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57 | next->prev = new; |
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58 | new->next = next; |
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59 | new->prev = prev; |
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60 | prev->next = new; |
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61 | } |
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62 | #else |
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63 | extern void __list_add(struct list_head *new, |
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64 | struct list_head *prev, |
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65 | struct list_head *next); |
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66 | #endif |
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67 | |||
68 | /** |
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69 | * list_add - add a new entry |
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70 | * @new: new entry to be added |
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71 | * @head: list head to add it after |
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72 | * |
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73 | * Insert a new entry after the specified head. |
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74 | * This is good for implementing stacks. |
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75 | */ |
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76 | static inline void list_add(struct list_head *new, struct list_head *head) |
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77 | { |
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78 | __list_add(new, head, head->next); |
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79 | } |
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80 | |||
81 | |||
82 | /** |
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83 | * list_add_tail - add a new entry |
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84 | * @new: new entry to be added |
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85 | * @head: list head to add it before |
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86 | * |
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87 | * Insert a new entry before the specified head. |
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88 | * This is useful for implementing queues. |
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89 | */ |
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90 | static inline void list_add_tail(struct list_head *new, struct list_head *head) |
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91 | { |
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92 | __list_add(new, head->prev, head); |
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93 | } |
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94 | |||
95 | /* |
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96 | * Delete a list entry by making the prev/next entries |
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97 | * point to each other. |
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98 | * |
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99 | * This is only for internal list manipulation where we know |
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100 | * the prev/next entries already! |
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101 | */ |
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102 | static inline void __list_del(struct list_head * prev, struct list_head * next) |
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103 | { |
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104 | next->prev = prev; |
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105 | prev->next = next; |
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106 | } |
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107 | |||
108 | /** |
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109 | * list_del - deletes entry from list. |
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110 | * @entry: the element to delete from the list. |
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111 | * Note: list_empty() on entry does not return true after this, the entry is |
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112 | * in an undefined state. |
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113 | */ |
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114 | #ifndef CONFIG_DEBUG_LIST |
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115 | static inline void list_del(struct list_head *entry) |
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116 | { |
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117 | __list_del(entry->prev, entry->next); |
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118 | entry->next = LIST_POISON1; |
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119 | entry->prev = LIST_POISON2; |
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120 | } |
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121 | #else |
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122 | extern void list_del(struct list_head *entry); |
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123 | #endif |
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124 | |||
125 | /** |
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126 | * list_replace - replace old entry by new one |
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127 | * @old : the element to be replaced |
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128 | * @new : the new element to insert |
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129 | * |
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130 | * If @old was empty, it will be overwritten. |
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131 | */ |
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132 | static inline void list_replace(struct list_head *old, |
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133 | struct list_head *new) |
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134 | { |
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135 | new->next = old->next; |
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136 | new->next->prev = new; |
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137 | new->prev = old->prev; |
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138 | new->prev->next = new; |
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139 | } |
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140 | |||
141 | static inline void list_replace_init(struct list_head *old, |
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142 | struct list_head *new) |
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143 | { |
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144 | list_replace(old, new); |
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145 | INIT_LIST_HEAD(old); |
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146 | } |
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147 | |||
148 | /** |
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149 | * list_del_init - deletes entry from list and reinitialize it. |
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150 | * @entry: the element to delete from the list. |
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151 | */ |
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152 | static inline void list_del_init(struct list_head *entry) |
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153 | { |
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154 | __list_del(entry->prev, entry->next); |
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155 | INIT_LIST_HEAD(entry); |
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156 | } |
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157 | |||
158 | /** |
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159 | * list_move - delete from one list and add as another's head |
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160 | * @list: the entry to move |
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161 | * @head: the head that will precede our entry |
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162 | */ |
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163 | static inline void list_move(struct list_head *list, struct list_head *head) |
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164 | { |
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165 | __list_del(list->prev, list->next); |
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166 | list_add(list, head); |
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167 | } |
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168 | |||
169 | /** |
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170 | * list_move_tail - delete from one list and add as another's tail |
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171 | * @list: the entry to move |
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172 | * @head: the head that will follow our entry |
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173 | */ |
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174 | static inline void list_move_tail(struct list_head *list, |
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175 | struct list_head *head) |
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176 | { |
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177 | __list_del(list->prev, list->next); |
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178 | list_add_tail(list, head); |
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179 | } |
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180 | |||
181 | /** |
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182 | * list_is_last - tests whether @list is the last entry in list @head |
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183 | * @list: the entry to test |
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184 | * @head: the head of the list |
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185 | */ |
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186 | static inline int list_is_last(const struct list_head *list, |
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187 | const struct list_head *head) |
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188 | { |
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189 | return list->next == head; |
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190 | } |
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191 | |||
192 | /** |
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193 | * list_empty - tests whether a list is empty |
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194 | * @head: the list to test. |
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195 | */ |
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196 | static inline int list_empty(const struct list_head *head) |
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197 | { |
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198 | return head->next == head; |
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199 | } |
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200 | |||
201 | /** |
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202 | * list_empty_careful - tests whether a list is empty and not being modified |
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203 | * @head: the list to test |
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204 | * |
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205 | * Description: |
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206 | * tests whether a list is empty _and_ checks that no other CPU might be |
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207 | * in the process of modifying either member (next or prev) |
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208 | * |
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209 | * NOTE: using list_empty_careful() without synchronization |
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210 | * can only be safe if the only activity that can happen |
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211 | * to the list entry is list_del_init(). Eg. it cannot be used |
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212 | * if another CPU could re-list_add() it. |
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213 | */ |
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214 | static inline int list_empty_careful(const struct list_head *head) |
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215 | { |
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216 | struct list_head *next = head->next; |
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217 | return (next == head) && (next == head->prev); |
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218 | } |
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219 | |||
220 | /** |
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221 | * list_is_singular - tests whether a list has just one entry. |
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222 | * @head: the list to test. |
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223 | */ |
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224 | static inline int list_is_singular(const struct list_head *head) |
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225 | { |
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226 | return !list_empty(head) && (head->next == head->prev); |
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227 | } |
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228 | |||
229 | static inline void __list_cut_position(struct list_head *list, |
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230 | struct list_head *head, struct list_head *entry) |
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231 | { |
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232 | struct list_head *new_first = entry->next; |
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233 | list->next = head->next; |
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234 | list->next->prev = list; |
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235 | list->prev = entry; |
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236 | entry->next = list; |
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237 | head->next = new_first; |
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238 | new_first->prev = head; |
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239 | } |
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240 | |||
241 | /** |
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242 | * list_cut_position - cut a list into two |
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243 | * @list: a new list to add all removed entries |
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244 | * @head: a list with entries |
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245 | * @entry: an entry within head, could be the head itself |
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246 | * and if so we won't cut the list |
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247 | * |
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248 | * This helper moves the initial part of @head, up to and |
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249 | * including @entry, from @head to @list. You should |
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250 | * pass on @entry an element you know is on @head. @list |
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251 | * should be an empty list or a list you do not care about |
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252 | * losing its data. |
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253 | * |
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254 | */ |
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255 | static inline void list_cut_position(struct list_head *list, |
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256 | struct list_head *head, struct list_head *entry) |
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257 | { |
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258 | if (list_empty(head)) |
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259 | return; |
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260 | if (list_is_singular(head) && |
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261 | (head->next != entry && head != entry)) |
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262 | return; |
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263 | if (entry == head) |
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264 | INIT_LIST_HEAD(list); |
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265 | else |
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266 | __list_cut_position(list, head, entry); |
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267 | } |
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268 | |||
269 | static inline void __list_splice(const struct list_head *list, |
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270 | struct list_head *prev, |
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271 | struct list_head *next) |
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272 | { |
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273 | struct list_head *first = list->next; |
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274 | struct list_head *last = list->prev; |
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275 | |||
276 | first->prev = prev; |
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277 | prev->next = first; |
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278 | |||
279 | last->next = next; |
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280 | next->prev = last; |
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281 | } |
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282 | |||
283 | /** |
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284 | * list_splice - join two lists, this is designed for stacks |
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285 | * @list: the new list to add. |
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286 | * @head: the place to add it in the first list. |
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287 | */ |
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288 | static inline void list_splice(const struct list_head *list, |
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289 | struct list_head *head) |
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290 | { |
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291 | if (!list_empty(list)) |
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292 | __list_splice(list, head, head->next); |
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293 | } |
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294 | |||
295 | /** |
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296 | * list_splice_tail - join two lists, each list being a queue |
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297 | * @list: the new list to add. |
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298 | * @head: the place to add it in the first list. |
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299 | */ |
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300 | static inline void list_splice_tail(struct list_head *list, |
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301 | struct list_head *head) |
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302 | { |
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303 | if (!list_empty(list)) |
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304 | __list_splice(list, head->prev, head); |
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305 | } |
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306 | |||
307 | /** |
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308 | * list_splice_init - join two lists and reinitialise the emptied list. |
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309 | * @list: the new list to add. |
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310 | * @head: the place to add it in the first list. |
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311 | * |
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312 | * The list at @list is reinitialised |
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313 | */ |
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314 | static inline void list_splice_init(struct list_head *list, |
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315 | struct list_head *head) |
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316 | { |
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317 | if (!list_empty(list)) { |
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318 | __list_splice(list, head, head->next); |
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319 | INIT_LIST_HEAD(list); |
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320 | } |
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321 | } |
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322 | |||
323 | /** |
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324 | * list_splice_tail_init - join two lists and reinitialise the emptied list |
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325 | * @list: the new list to add. |
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326 | * @head: the place to add it in the first list. |
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327 | * |
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328 | * Each of the lists is a queue. |
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329 | * The list at @list is reinitialised |
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330 | */ |
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331 | static inline void list_splice_tail_init(struct list_head *list, |
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332 | struct list_head *head) |
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333 | { |
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334 | if (!list_empty(list)) { |
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335 | __list_splice(list, head->prev, head); |
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336 | INIT_LIST_HEAD(list); |
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337 | } |
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338 | } |
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339 | |||
340 | /** |
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341 | * list_entry - get the struct for this entry |
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342 | * @ptr: the &struct list_head pointer. |
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343 | * @type: the type of the struct this is embedded in. |
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344 | * @member: the name of the list_struct within the struct. |
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345 | */ |
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346 | #define list_entry(ptr, type, member) \ |
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347 | container_of(ptr, type, member) |
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348 | |||
349 | /** |
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350 | * list_first_entry - get the first element from a list |
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351 | * @ptr: the list head to take the element from. |
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352 | * @type: the type of the struct this is embedded in. |
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353 | * @member: the name of the list_struct within the struct. |
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354 | * |
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355 | * Note, that list is expected to be not empty. |
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356 | */ |
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357 | #define list_first_entry(ptr, type, member) \ |
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358 | list_entry((ptr)->next, type, member) |
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359 | |||
360 | /** |
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361 | * list_for_each - iterate over a list |
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362 | * @pos: the &struct list_head to use as a loop cursor. |
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363 | * @head: the head for your list. |
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364 | */ |
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365 | #define list_for_each(pos, head) \ |
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366 | for (pos = (head)->next; prefetch(pos->next), pos != (head); \ |
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367 | pos = pos->next) |
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368 | |||
369 | /** |
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370 | * __list_for_each - iterate over a list |
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371 | * @pos: the &struct list_head to use as a loop cursor. |
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372 | * @head: the head for your list. |
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373 | * |
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374 | * This variant differs from list_for_each() in that it's the |
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375 | * simplest possible list iteration code, no prefetching is done. |
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376 | * Use this for code that knows the list to be very short (empty |
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377 | * or 1 entry) most of the time. |
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378 | */ |
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379 | #define __list_for_each(pos, head) \ |
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380 | for (pos = (head)->next; pos != (head); pos = pos->next) |
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381 | |||
382 | /** |
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383 | * list_for_each_prev - iterate over a list backwards |
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384 | * @pos: the &struct list_head to use as a loop cursor. |
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385 | * @head: the head for your list. |
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386 | */ |
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387 | #define list_for_each_prev(pos, head) \ |
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388 | for (pos = (head)->prev; prefetch(pos->prev), pos != (head); \ |
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389 | pos = pos->prev) |
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390 | |||
391 | /** |
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392 | * list_for_each_safe - iterate over a list safe against removal of list entry |
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393 | * @pos: the &struct list_head to use as a loop cursor. |
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394 | * @n: another &struct list_head to use as temporary storage |
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395 | * @head: the head for your list. |
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396 | */ |
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397 | #define list_for_each_safe(pos, n, head) \ |
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398 | for (pos = (head)->next, n = pos->next; pos != (head); \ |
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399 | pos = n, n = pos->next) |
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400 | |||
401 | /** |
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402 | * list_for_each_prev_safe - iterate over a list backwards safe against removal of list entry |
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403 | * @pos: the &struct list_head to use as a loop cursor. |
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404 | * @n: another &struct list_head to use as temporary storage |
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405 | * @head: the head for your list. |
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406 | */ |
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407 | #define list_for_each_prev_safe(pos, n, head) \ |
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408 | for (pos = (head)->prev, n = pos->prev; \ |
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409 | prefetch(pos->prev), pos != (head); \ |
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410 | pos = n, n = pos->prev) |
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411 | |||
412 | /** |
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413 | * list_for_each_entry - iterate over list of given type |
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414 | * @pos: the type * to use as a loop cursor. |
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415 | * @head: the head for your list. |
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416 | * @member: the name of the list_struct within the struct. |
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417 | */ |
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418 | #define list_for_each_entry(pos, head, member) \ |
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419 | for (pos = list_entry((head)->next, typeof(*pos), member); \ |
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420 | prefetch(pos->member.next), &pos->member != (head); \ |
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421 | pos = list_entry(pos->member.next, typeof(*pos), member)) |
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422 | |||
423 | /** |
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424 | * list_for_each_entry_reverse - iterate backwards over list of given type. |
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425 | * @pos: the type * to use as a loop cursor. |
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426 | * @head: the head for your list. |
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427 | * @member: the name of the list_struct within the struct. |
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428 | */ |
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429 | #define list_for_each_entry_reverse(pos, head, member) \ |
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430 | for (pos = list_entry((head)->prev, typeof(*pos), member); \ |
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431 | prefetch(pos->member.prev), &pos->member != (head); \ |
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432 | pos = list_entry(pos->member.prev, typeof(*pos), member)) |
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433 | |||
434 | /** |
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435 | * list_prepare_entry - prepare a pos entry for use in list_for_each_entry_continue() |
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436 | * @pos: the type * to use as a start point |
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437 | * @head: the head of the list |
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438 | * @member: the name of the list_struct within the struct. |
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439 | * |
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440 | * Prepares a pos entry for use as a start point in list_for_each_entry_continue(). |
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441 | */ |
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442 | #define list_prepare_entry(pos, head, member) \ |
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443 | ((pos) ? : list_entry(head, typeof(*pos), member)) |
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444 | |||
445 | /** |
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446 | * list_for_each_entry_continue - continue iteration over list of given type |
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447 | * @pos: the type * to use as a loop cursor. |
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448 | * @head: the head for your list. |
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449 | * @member: the name of the list_struct within the struct. |
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450 | * |
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451 | * Continue to iterate over list of given type, continuing after |
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452 | * the current position. |
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453 | */ |
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454 | #define list_for_each_entry_continue(pos, head, member) \ |
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455 | for (pos = list_entry(pos->member.next, typeof(*pos), member); \ |
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456 | prefetch(pos->member.next), &pos->member != (head); \ |
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457 | pos = list_entry(pos->member.next, typeof(*pos), member)) |
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458 | |||
459 | /** |
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460 | * list_for_each_entry_continue_reverse - iterate backwards from the given point |
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461 | * @pos: the type * to use as a loop cursor. |
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462 | * @head: the head for your list. |
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463 | * @member: the name of the list_struct within the struct. |
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464 | * |
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465 | * Start to iterate over list of given type backwards, continuing after |
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466 | * the current position. |
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467 | */ |
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468 | #define list_for_each_entry_continue_reverse(pos, head, member) \ |
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469 | for (pos = list_entry(pos->member.prev, typeof(*pos), member); \ |
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470 | prefetch(pos->member.prev), &pos->member != (head); \ |
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471 | pos = list_entry(pos->member.prev, typeof(*pos), member)) |
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472 | |||
473 | /** |
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474 | * list_for_each_entry_from - iterate over list of given type from the current point |
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475 | * @pos: the type * to use as a loop cursor. |
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476 | * @head: the head for your list. |
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477 | * @member: the name of the list_struct within the struct. |
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478 | * |
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479 | * Iterate over list of given type, continuing from current position. |
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480 | */ |
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481 | #define list_for_each_entry_from(pos, head, member) \ |
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482 | for (; prefetch(pos->member.next), &pos->member != (head); \ |
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483 | pos = list_entry(pos->member.next, typeof(*pos), member)) |
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484 | |||
485 | /** |
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486 | * list_for_each_entry_safe - iterate over list of given type safe against removal of list entry |
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487 | * @pos: the type * to use as a loop cursor. |
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488 | * @n: another type * to use as temporary storage |
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489 | * @head: the head for your list. |
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490 | * @member: the name of the list_struct within the struct. |
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491 | */ |
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492 | #define list_for_each_entry_safe(pos, n, head, member) \ |
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493 | for (pos = list_entry((head)->next, typeof(*pos), member), \ |
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494 | n = list_entry(pos->member.next, typeof(*pos), member); \ |
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495 | &pos->member != (head); \ |
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496 | pos = n, n = list_entry(n->member.next, typeof(*n), member)) |
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497 | |||
498 | /** |
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499 | * list_for_each_entry_safe_continue |
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500 | * @pos: the type * to use as a loop cursor. |
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501 | * @n: another type * to use as temporary storage |
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502 | * @head: the head for your list. |
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503 | * @member: the name of the list_struct within the struct. |
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504 | * |
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505 | * Iterate over list of given type, continuing after current point, |
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506 | * safe against removal of list entry. |
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507 | */ |
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508 | #define list_for_each_entry_safe_continue(pos, n, head, member) \ |
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509 | for (pos = list_entry(pos->member.next, typeof(*pos), member), \ |
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510 | n = list_entry(pos->member.next, typeof(*pos), member); \ |
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511 | &pos->member != (head); \ |
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512 | pos = n, n = list_entry(n->member.next, typeof(*n), member)) |
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513 | |||
514 | /** |
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515 | * list_for_each_entry_safe_from |
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516 | * @pos: the type * to use as a loop cursor. |
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517 | * @n: another type * to use as temporary storage |
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518 | * @head: the head for your list. |
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519 | * @member: the name of the list_struct within the struct. |
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520 | * |
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521 | * Iterate over list of given type from current point, safe against |
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522 | * removal of list entry. |
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523 | */ |
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524 | #define list_for_each_entry_safe_from(pos, n, head, member) \ |
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525 | for (n = list_entry(pos->member.next, typeof(*pos), member); \ |
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526 | &pos->member != (head); \ |
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527 | pos = n, n = list_entry(n->member.next, typeof(*n), member)) |
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528 | |||
529 | /** |
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530 | * list_for_each_entry_safe_reverse |
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531 | * @pos: the type * to use as a loop cursor. |
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532 | * @n: another type * to use as temporary storage |
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533 | * @head: the head for your list. |
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534 | * @member: the name of the list_struct within the struct. |
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535 | * |
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536 | * Iterate backwards over list of given type, safe against removal |
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537 | * of list entry. |
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538 | */ |
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539 | #define list_for_each_entry_safe_reverse(pos, n, head, member) \ |
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540 | for (pos = list_entry((head)->prev, typeof(*pos), member), \ |
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541 | n = list_entry(pos->member.prev, typeof(*pos), member); \ |
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542 | &pos->member != (head); \ |
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543 | pos = n, n = list_entry(n->member.prev, typeof(*n), member)) |
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544 | |||
545 | /* |
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546 | * Double linked lists with a single pointer list head. |
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547 | * Mostly useful for hash tables where the two pointer list head is |
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548 | * too wasteful. |
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549 | * You lose the ability to access the tail in O(1). |
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550 | */ |
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551 | |||
552 | struct hlist_head { |
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553 | struct hlist_node *first; |
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554 | }; |
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555 | |||
556 | struct hlist_node { |
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557 | struct hlist_node *next, **pprev; |
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558 | }; |
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559 | |||
560 | #define HLIST_HEAD_INIT { .first = NULL } |
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561 | #define HLIST_HEAD(name) struct hlist_head name = { .first = NULL } |
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562 | #define INIT_HLIST_HEAD(ptr) ((ptr)->first = NULL) |
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563 | static inline void INIT_HLIST_NODE(struct hlist_node *h) |
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564 | { |
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565 | h->next = NULL; |
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566 | h->pprev = NULL; |
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567 | } |
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568 | |||
569 | static inline int hlist_unhashed(const struct hlist_node *h) |
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570 | { |
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571 | return !h->pprev; |
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572 | } |
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573 | |||
574 | static inline int hlist_empty(const struct hlist_head *h) |
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575 | { |
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576 | return !h->first; |
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577 | } |
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578 | |||
579 | static inline void __hlist_del(struct hlist_node *n) |
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580 | { |
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581 | struct hlist_node *next = n->next; |
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582 | struct hlist_node **pprev = n->pprev; |
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583 | *pprev = next; |
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584 | if (next) |
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585 | next->pprev = pprev; |
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586 | } |
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587 | |||
588 | static inline void hlist_del(struct hlist_node *n) |
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589 | { |
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590 | __hlist_del(n); |
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591 | n->next = (struct hlist_node*)LIST_POISON1; |
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592 | n->pprev = (struct hlist_node**)LIST_POISON2; |
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593 | } |
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594 | |||
595 | static inline void hlist_del_init(struct hlist_node *n) |
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596 | { |
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597 | if (!hlist_unhashed(n)) { |
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598 | __hlist_del(n); |
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599 | INIT_HLIST_NODE(n); |
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600 | } |
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601 | } |
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602 | |||
603 | static inline void hlist_add_head(struct hlist_node *n, struct hlist_head *h) |
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604 | { |
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605 | struct hlist_node *first = h->first; |
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606 | n->next = first; |
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607 | if (first) |
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608 | first->pprev = &n->next; |
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609 | h->first = n; |
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610 | n->pprev = &h->first; |
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611 | } |
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612 | |||
613 | /* next must be != NULL */ |
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614 | static inline void hlist_add_before(struct hlist_node *n, |
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615 | struct hlist_node *next) |
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616 | { |
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617 | n->pprev = next->pprev; |
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618 | n->next = next; |
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619 | next->pprev = &n->next; |
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620 | *(n->pprev) = n; |
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621 | } |
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622 | |||
623 | static inline void hlist_add_after(struct hlist_node *n, |
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624 | struct hlist_node *next) |
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625 | { |
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626 | next->next = n->next; |
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627 | n->next = next; |
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628 | next->pprev = &n->next; |
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629 | |||
630 | if(next->next) |
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631 | next->next->pprev = &next->next; |
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632 | } |
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633 | |||
634 | /* |
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635 | * Move a list from one list head to another. Fixup the pprev |
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636 | * reference of the first entry if it exists. |
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637 | */ |
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638 | static inline void hlist_move_list(struct hlist_head *old, |
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639 | struct hlist_head *new) |
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640 | { |
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641 | new->first = old->first; |
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642 | if (new->first) |
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643 | new->first->pprev = &new->first; |
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644 | old->first = NULL; |
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645 | } |
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646 | |||
647 | #define hlist_entry(ptr, type, member) container_of(ptr,type,member) |
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648 | |||
649 | #define hlist_for_each(pos, head) \ |
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650 | for (pos = (head)->first; pos && ({ prefetch(pos->next); 1; }); \ |
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651 | pos = pos->next) |
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652 | |||
653 | #define hlist_for_each_safe(pos, n, head) \ |
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654 | for (pos = (head)->first; pos && ({ n = pos->next; 1; }); \ |
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655 | pos = n) |
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656 | |||
657 | /** |
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658 | * hlist_for_each_entry - iterate over list of given type |
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659 | * @tpos: the type * to use as a loop cursor. |
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660 | * @pos: the &struct hlist_node to use as a loop cursor. |
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661 | * @head: the head for your list. |
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662 | * @member: the name of the hlist_node within the struct. |
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663 | */ |
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664 | #define hlist_for_each_entry(tpos, pos, head, member) \ |
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665 | for (pos = (head)->first; \ |
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666 | pos && ({ prefetch(pos->next); 1;}) && \ |
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667 | ({ tpos = hlist_entry(pos, typeof(*tpos), member); 1;}); \ |
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668 | pos = pos->next) |
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669 | |||
670 | /** |
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671 | * hlist_for_each_entry_continue - iterate over a hlist continuing after current point |
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672 | * @tpos: the type * to use as a loop cursor. |
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673 | * @pos: the &struct hlist_node to use as a loop cursor. |
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674 | * @member: the name of the hlist_node within the struct. |
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675 | */ |
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676 | #define hlist_for_each_entry_continue(tpos, pos, member) \ |
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677 | for (pos = (pos)->next; \ |
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678 | pos && ({ prefetch(pos->next); 1;}) && \ |
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679 | ({ tpos = hlist_entry(pos, typeof(*tpos), member); 1;}); \ |
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680 | pos = pos->next) |
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681 | |||
682 | /** |
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683 | * hlist_for_each_entry_from - iterate over a hlist continuing from current point |
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684 | * @tpos: the type * to use as a loop cursor. |
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685 | * @pos: the &struct hlist_node to use as a loop cursor. |
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686 | * @member: the name of the hlist_node within the struct. |
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687 | */ |
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688 | #define hlist_for_each_entry_from(tpos, pos, member) \ |
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689 | for (; pos && ({ prefetch(pos->next); 1;}) && \ |
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690 | ({ tpos = hlist_entry(pos, typeof(*tpos), member); 1;}); \ |
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691 | pos = pos->next) |
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692 | |||
693 | /** |
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694 | * hlist_for_each_entry_safe - iterate over list of given type safe against removal of list entry |
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695 | * @tpos: the type * to use as a loop cursor. |
||
696 | * @pos: the &struct hlist_node to use as a loop cursor. |
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697 | * @n: another &struct hlist_node to use as temporary storage |
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698 | * @head: the head for your list. |
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699 | * @member: the name of the hlist_node within the struct. |
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700 | */ |
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701 | #define hlist_for_each_entry_safe(tpos, pos, n, head, member) \ |
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702 | for (pos = (head)->first; \ |
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703 | pos && ({ n = pos->next; 1; }) && \ |
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704 | ({ tpos = hlist_entry(pos, typeof(*tpos), member); 1;}); \ |
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705 | pos = n) |
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706 | |||
707 | #endif |