use UVM_FLAG_UNMAP instead of unmapping separately.
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c0e93342a1
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@ -1,4 +1,4 @@
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/* $NetBSD: privcmd.c,v 1.50 2017/06/01 02:45:08 chs Exp $ */
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/* $NetBSD: privcmd.c,v 1.51 2017/06/22 22:36:50 chs Exp $ */
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/*-
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* Copyright (c) 2004 Christian Limpach.
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@ -27,7 +27,7 @@
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: privcmd.c,v 1.50 2017/06/01 02:45:08 chs Exp $");
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__KERNEL_RCSID(0, "$NetBSD: privcmd.c,v 1.51 2017/06/22 22:36:50 chs Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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@ -546,34 +546,20 @@ privcmd_map_obj(struct vm_map *map, vaddr_t start, paddr_t *maddr,
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return EINVAL;
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}
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vm_map_unlock_read(map);
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/* remove current entries */
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uvm_unmap1(map, start, start + size, 0);
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obj = kmem_alloc(sizeof(*obj), KM_SLEEP);
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privcmd_nobjects++;
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uvm_obj_init(&obj->uobj, &privpgops, true, 1);
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mutex_enter(obj->uobj.vmobjlock);
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obj->maddr = maddr;
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obj->npages = npages;
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obj->domid = domid;
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mutex_exit(obj->uobj.vmobjlock);
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uvmflag = UVM_MAPFLAG(prot, prot, UVM_INH_NONE, UVM_ADV_NORMAL,
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UVM_FLAG_FIXED | UVM_FLAG_NOMERGE);
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UVM_FLAG_FIXED | UVM_FLAG_UNMAP | UVM_FLAG_NOMERGE);
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error = uvm_map(map, &newstart, size, &obj->uobj, 0, 0, uvmflag);
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if (error) {
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if (obj)
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if (error)
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obj->uobj.pgops->pgo_detach(&obj->uobj);
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return error;
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}
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if (newstart != start) {
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printf("uvm_map didn't give us back our vm space\n");
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uvm_unmap1(map, newstart, newstart + size, 0);
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if (obj)
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obj->uobj.pgops->pgo_detach(&obj->uobj);
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return EINVAL;
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}
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return 0;
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}
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static const struct kernfs_fileop privcmd_fileops[] = {
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