__d_drop
__d_drop(dentry);
__d_drop(dentry);
__d_drop(dentry);
__d_drop(dentry);
__d_drop(dentry);
EXPORT_SYMBOL(__d_drop);
__d_drop(dentry);
__d_drop(dentry);
__d_drop(ret);
__d_drop(dentry);
extern void __d_drop(struct dentry *dentry);