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Rev 6102 Rev 6936
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#define rb_parent(r)   ((struct rb_node *)((r)->__rb_parent_color & ~3))
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#define rb_parent(r)   ((struct rb_node *)((r)->__rb_parent_color & ~3))
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#define RB_ROOT	(struct rb_root) { NULL, }
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#define RB_ROOT	(struct rb_root) { NULL, }
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#define	rb_entry(ptr, type, member) container_of(ptr, type, member)
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#define	rb_entry(ptr, type, member) container_of(ptr, type, member)
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#define RB_EMPTY_ROOT(root)  ((root)->rb_node == NULL)
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#define RB_EMPTY_ROOT(root)  (READ_ONCE((root)->rb_node) == NULL)
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/* 'empty' nodes are nodes that are known not to be inserted in an rbtree */
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/* 'empty' nodes are nodes that are known not to be inserted in an rbtree */