D54022.id167437.diff
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D54022.id167437.diff
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	diff --git a/sys/riscv/riscv/pmap.c b/sys/riscv/riscv/pmap.c
	--- a/sys/riscv/riscv/pmap.c
	+++ b/sys/riscv/riscv/pmap.c
	@@ -1134,19 +1134,30 @@
	vm_page_t
	pmap_extract_and_hold(pmap_t pmap, vm_offset_t va, vm_prot_t prot)
	{
	+ pd_entry_t *l2p, l2;
	pt_entry_t *l3p, l3;
	vm_page_t m;

	m = NULL;
	PMAP_LOCK(pmap);
	- l3p = pmap_l3(pmap, va);
	- if (l3p != NULL && (l3 = pmap_load(l3p)) != 0) {
	- if ((l3 & PTE_W) != 0 \|\| (prot & VM_PROT_WRITE) == 0) {
	- m = PTE_TO_VM_PAGE(l3);
	- if (!vm_page_wire_mapped(m))
	- m = NULL;
	+ l2p = pmap_l2(pmap, va);
	+ if (l2p == NULL \|\| ((l2 = pmap_load(l2p)) & PTE_V) == 0)
	+ goto out;
	+ if ((l2 & PTE_RWX) != 0) {
	+ if ((l2 & PTE_W) != 0 \|\| (prot & VM_PROT_WRITE) == 0) {
	+ m = PHYS_TO_VM_PAGE(L2PTE_TO_PHYS(l2) +
	+ (va & L2_OFFSET));
	}
	+ goto out;
	+ }
	+ l3p = pmap_l2_to_l3(l2p, va);
	+ if ((l3 = pmap_load(l3p)) != 0) {
	+ if ((l3 & PTE_W) != 0 \|\| (prot & VM_PROT_WRITE) == 0)
	+ m = PTE_TO_VM_PAGE(l3);
	}
	+out:
	+ if (m != NULL && !vm_page_wire_mapped(m))
	+ m = NULL;
	PMAP_UNLOCK(pmap);
	return (m);
	}