Function pmap_remove_pt_page

freebsd/arm64/arm64/pmap.c:3426–3432

* Removes the page table page mapping the specified virtual address from the * specified pmap's collection of idle page table pages, and returns it. * Otherwise, returns NULL if there is no page table page corresponding to the * specified virtual address. */

 * specified virtual address.
 */
static __inline vm_page_t
pmap_remove_pt_page(pmap_t pmap, vm_offset_t va)
{

	PMAP_LOCK_ASSERT(pmap, MA_OWNED);
	return (vm_radix_remove(&pmap->pm_root, pmap_l2_pindex(va)));
}

/*
 * Performs a break-before-make update of a pmap entry. This is needed when