Feature #4636
Updated by Vadim Mutilin over 10 years ago
h2. Releasing resources of gendisk interface h2. DESCRIPTION The resources of gendisk interface should be released correctly. Otherwise it may lead to memory leaks and other errors caused by accessing nonexistent elements of gendisk. For functions `alloc_disk`, `add_disk` it is required to use corresponding `put_disk`, `del_disk`. h2. EXAMPLE **Correct usage example:** <pre> struct gendisk* gd; int init_module() { ... gd=alloc_disk(32 /*the number of minor devices*/); //further initialization of gendisk gd->first_minor=0; ... } void module_exit() { ... //finishing work of gendisk and releasing resources del_gendisk(gd); //switch off object interface put_disk(gd); //free memory } </pre>