D14825.id40688.diff
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D14825.id40688.diff
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	Index: sys/vm/vm.h
	===================================================================
	--- sys/vm/vm.h
	+++ sys/vm/vm.h
	@@ -80,7 +80,9 @@
	#define VM_PROT_WRITE ((vm_prot_t) 0x02)
	#define VM_PROT_EXECUTE ((vm_prot_t) 0x04)
	#define VM_PROT_COPY ((vm_prot_t) 0x08) /* copy-on-read */
	-#define VM_PROT_FAULT_LOOKUP ((vm_prot_t) 0x010)
	+#define VM_PROT_PRIV_FLAG ((vm_prot_t) 0x010)
	+#define VM_PROT_FAULT_LOOKUP VM_PROT_PRIV_FLAG
	+#define VM_PROT_QUICK_NOFAULT VM_PROT_PRIV_FLAG /* same to save bits */

	#define VM_PROT_ALL (VM_PROT_READ\|VM_PROT_WRITE\|VM_PROT_EXECUTE)
	#define VM_PROT_RW (VM_PROT_READ\|VM_PROT_WRITE)
	Index: sys/vm/vm_fault.c
	===================================================================
	--- sys/vm/vm_fault.c
	+++ sys/vm/vm_fault.c
	@@ -1525,6 +1525,9 @@
	* mapping had insufficient permissions. Attempt to fault in
	* and hold these pages.
	*/
	+ if ((prot & VM_PROT_QUICK_NOFAULT) != 0 &&
	+ (curthread->td_pflags & TDP_NOFAULTING) != 0)
	+ goto error;
	for (mp = ma, va = addr; va < end; mp++, va += PAGE_SIZE)
	if (*mp == NULL && vm_fault_hold(map, va, prot,
	VM_FAULT_NORMAL, mp) != KERN_SUCCESS)