valid              81 kernel/bio.c         b->valid = 0;
valid              98 kernel/bio.c     if(!b->valid) {
valid             100 kernel/bio.c       b->valid = 1;
valid               2 kernel/buf.h     int valid;   // has data been read from disk?
valid              22 kernel/file.h    int valid;          // inode has been read from disk?
valid             274 kernel/fs.c      ip->valid = 0;
valid             304 kernel/fs.c      if(ip->valid == 0){
valid             314 kernel/fs.c        ip->valid = 1;
valid             342 kernel/fs.c      if(ip->ref == 1 && ip->valid && ip->nlink == 0){
valid             354 kernel/fs.c        ip->valid = 0;