Function frame_reference_add

kernel/generic/src/mm/frame.c:1069–1083

Add reference to frame. * * Find respective frame structure for supplied PFN and * increment frame reference count. * * @param pfn Frame number of the frame to be freed. * */

 *
 */
_NO_TRACE void frame_reference_add(pfn_t pfn)
{
	irq_spinlock_lock(&zones.lock, true);

	/*
	 * First, find host frame zone for addr.
	 */
	size_t znum = find_zone(pfn, 1, 0);

	assert(znum != (size_t) -1);

	zones.info[znum].frames[pfn - zones.info[znum].base].refcount++;

	irq_spinlock_unlock(&zones.lock, true);
}

/** Mark given range unavailable in frame zones.
 *