Index: sys/uvm/uvm_bio.c
===================================================================
RCS file: /home/netbsd/src/sys/uvm/uvm_bio.c,v
retrieving revision 1.121
diff -p -u -r1.121 uvm_bio.c
--- sys/uvm/uvm_bio.c	9 Jul 2020 09:24:32 -0000	1.121
+++ sys/uvm/uvm_bio.c	15 Sep 2020 02:24:33 -0000
@@ -235,9 +235,7 @@ static inline int
 ubc_fault_page(const struct uvm_faultinfo *ufi, const struct ubc_map *umap,
     struct vm_page *pg, vm_prot_t prot, vm_prot_t access_type, vaddr_t va)
 {
-	vm_prot_t mask;
 	int error;
-	bool rdonly;
 
 	KASSERT(rw_write_held(pg->uobject->vmobjlock));
 
@@ -280,11 +278,8 @@ ubc_fault_page(const struct uvm_faultinf
 	    pg->offset < umap->writeoff ||
 	    pg->offset + PAGE_SIZE > umap->writeoff + umap->writelen);
 
-	rdonly = uvm_pagereadonly_p(pg);
-	mask = rdonly ? ~VM_PROT_WRITE : VM_PROT_ALL;
-
 	error = pmap_enter(ufi->orig_map->pmap, va, VM_PAGE_TO_PHYS(pg),
-	    prot & mask, PMAP_CANFAIL | (access_type & mask));
+	    prot, PMAP_CANFAIL | access_type);
 
 	uvm_pagelock(pg);
 	uvm_pageactivate(pg);