new UVM_ET_IMMUTABLE flag marks a uvm entry as immutable.

diff --git a/sys/uvm/uvm.h b/sys/uvm/uvm.h
index 672e415..1ed1e49 100644 (file)
--- a/sys/uvm/uvm.h
+++ b/sys/uvm/uvm.h
@@ -1,4 +1,4 @@
-/*     $OpenBSD: uvm.h,v 1.70 2022/09/29 04:10:27 deraadt Exp $        */
+/*     $OpenBSD: uvm.h,v 1.71 2022/10/07 05:01:44 deraadt Exp $        */
 /*     $NetBSD: uvm.h,v 1.24 2000/11/27 08:40:02 chs Exp $     */
 
 /*
@@ -92,6 +92,7 @@ struct uvm {
 #define UVM_ET_WC              0x0080  /* write combining */
 #define UVM_ET_CONCEAL         0x0100  /* omit from dumps */
 #define UVM_ET_SYSCALL         0x0200  /* syscall text segment */
+#define UVM_ET_IMMUTABLE       0x0400  /* entry may not be changed */
 #define UVM_ET_FREEMAPPED      0x8000  /* map entry is on free list (DEBUG) */
 
 #define UVM_ET_ISOBJ(E)                (((E)->etype & UVM_ET_OBJ) != 0)