j                 428 kernel/fs.c      int i, j;
j                 442 kernel/fs.c        for(j = 0; j < NINDIRECT; j++){
j                 443 kernel/fs.c          if(a[j])
j                 444 kernel/fs.c            bfree(ip->dev, a[j]);
j                 207 kernel/virtio_disk.c       for(int j = 0; j < i; j++)
j                 208 kernel/virtio_disk.c         free_desc(idx[j]);
j                 973 user/usertests.c       for(int j = 0; j < 200; j++){
j                1153 user/usertests.c   int fd, pid, i, j, n, total, pi;
j                1198 user/usertests.c       for(j = 0; j < n; j++){
j                1199 user/usertests.c         if(buf[j] != '0'+i){