dentry2 2904 fs/dcache.c void d_exchange(struct dentry *dentry1, struct dentry *dentry2) dentry2 2909 fs/dcache.c WARN_ON(!dentry2->d_inode); dentry2 2911 fs/dcache.c WARN_ON(IS_ROOT(dentry2)); dentry2 2913 fs/dcache.c __d_move(dentry1, dentry2, true);