head               32 kernel/bio.c     struct buf head;
head               43 kernel/bio.c     bcache.head.prev = &bcache.head;
head               44 kernel/bio.c     bcache.head.next = &bcache.head;
head               46 kernel/bio.c       b->next = bcache.head.next;
head               47 kernel/bio.c       b->prev = &bcache.head;
head               49 kernel/bio.c       bcache.head.next->prev = b;
head               50 kernel/bio.c       bcache.head.next = b;
head               65 kernel/bio.c     for (b = bcache.head.next; b != &bcache.head; b = b->next) {
head               76 kernel/bio.c     for (b = bcache.head.prev; b != &bcache.head; b = b->prev) {
head              130 kernel/bio.c       b->next = bcache.head.next;
head              131 kernel/bio.c       b->prev = &bcache.head;
head              132 kernel/bio.c       bcache.head.next->prev = b;
head              133 kernel/bio.c       bcache.head.next = b;