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#define FRAME_KA    1   /* skip frames conflicting with user address space */
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#define FRAME_KA    1   /* skip frames conflicting with user address space */
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#define FRAME_PANIC 2   /* panic on failure */
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#define FRAME_PANIC 2   /* panic on failure */
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#define FRAME2ADDR(zone, frame)         ((zone)->base + ((frame) - (zone)->frames) * FRAME_SIZE)
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#define FRAME2ADDR(zone, frame)         ((zone)->base + ((frame) - (zone)->frames) * FRAME_SIZE)
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#define ADDR2FRAME(zone, addr)          (&((zone)->frames[((addr) - (zone)->base) / FRAME_SIZE]))
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#define ADDR2FRAME(zone, addr)          (&((zone)->frames[((addr) - (zone)->base) / FRAME_SIZE]))
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#define FRAME_INDEX(zone, frame)        ((count_t)((frame) - (zone)->frames))
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#define FRAME_INDEX(zone, frame)        ((index_t)((frame) - (zone)->frames))
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#define FRAME_INDEX_VALID(zone, index)      (((index) >= 0) && ((index) < ((zone)->free_count + (zone)->busy_count)))
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#define FRAME_INDEX_VALID(zone, index)      (((index) >= 0) && ((index) < ((zone)->free_count + (zone)->busy_count)))
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#define IS_BUDDY_LEFT_BLOCK(zone, frame)    ((FRAME_INDEX((zone), (frame)) % (1 << ((frame)->buddy_order + 1))) == 0)
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#define IS_BUDDY_LEFT_BLOCK(zone, frame)    ((FRAME_INDEX((zone), (frame)) & ~(((__native) -1)<<((frame)->buddy_order + 1))) == 0)
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#define IS_BUDDY_RIGHT_BLOCK(zone, frame)   ((FRAME_INDEX((zone), (frame)) % (1 << ((frame)->buddy_order + 1))) == (1 << (frame)->buddy_order))
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#define ZONE_BLACKLIST_SIZE 3
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#define ZONE_BLACKLIST_SIZE 3
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struct zone {
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struct zone {
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    link_t link;        /**< link to previous and next zone */
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    link_t link;        /**< link to previous and next zone */