centos man page for idr_destroy

IDR_DESTROY(9)						  Basic Kernel Library Functions					    IDR_DESTROY(9)

NAME
       idr_destroy - release all cached layers within an idr tree

SYNOPSIS
       void idr_destroy(struct idr * idp);

ARGUMENTS
       idp
	   idr handle

DESCRIPTION
       Free all id mappings and all idp_layers. After this function, idp is completely unused and can be freed / recycled. The caller is
       responsible for ensuring that no one else accesses idp during or after idr_destroy.

       A typical clean-up sequence for objects stored in an idr tree will use idr_for_each to free all objects, if necessay, then idr_destroy to
       free up the id mappings and cached idr_layers.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014							    IDR_DESTROY(9)