[src/trunk]: src/sys/uvm Introduce uvm_km_protect.

[maxv <maxv%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/f49290085134
branches:  trunk
changeset: 346581:f49290085134
user:      maxv <maxv%NetBSD.org@localhost>
date:      Wed Jul 20 12:38:43 2016 +0000

description:
Introduce uvm_km_protect.

diffstat:

 sys/uvm/uvm_extern.h |   4 +++-
 sys/uvm/uvm_km.c     |  14 ++++++++++++--
 2 files changed, 15 insertions(+), 3 deletions(-)

diffs (53 lines):

diff -r a9f82172e2ec -r f49290085134 sys/uvm/uvm_extern.h
--- a/sys/uvm/uvm_extern.h      Wed Jul 20 12:33:59 2016 +0000
+++ b/sys/uvm/uvm_extern.h      Wed Jul 20 12:38:43 2016 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: uvm_extern.h,v 1.197 2016/05/25 17:43:58 christos Exp $        */
+/*     $NetBSD: uvm_extern.h,v 1.198 2016/07/20 12:38:43 maxv Exp $    */
 
 /*
  * Copyright (c) 1997 Charles D. Cranor and Washington University.
@@ -627,6 +627,8 @@
 /* uvm_km.c */
 vaddr_t                        uvm_km_alloc(struct vm_map *, vsize_t, vsize_t,
                            uvm_flag_t);
+int                    uvm_km_protect(struct vm_map *, vaddr_t, vsize_t,
+                           vm_prot_t);
 void                   uvm_km_free(struct vm_map *, vaddr_t, vsize_t,
                            uvm_flag_t);
 
diff -r a9f82172e2ec -r f49290085134 sys/uvm/uvm_km.c
--- a/sys/uvm/uvm_km.c  Wed Jul 20 12:33:59 2016 +0000
+++ b/sys/uvm/uvm_km.c  Wed Jul 20 12:38:43 2016 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: uvm_km.c,v 1.139 2015/02/06 18:19:22 maxv Exp $        */
+/*     $NetBSD: uvm_km.c,v 1.140 2016/07/20 12:38:43 maxv Exp $        */
 
 /*
  * Copyright (c) 1997 Charles D. Cranor and Washington University.
@@ -152,7 +152,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: uvm_km.c,v 1.139 2015/02/06 18:19:22 maxv Exp $");
+__KERNEL_RCSID(0, "$NetBSD: uvm_km.c,v 1.140 2016/07/20 12:38:43 maxv Exp $");
 
 #include "opt_uvmhist.h"
 
@@ -708,6 +708,16 @@
 }
 
 /*
+ * uvm_km_protect: change the protection of an allocated area
+ */
+
+int
+uvm_km_protect(struct vm_map *map, vaddr_t addr, vsize_t size, vm_prot_t prot)
+{
+       return uvm_map_protect(map, addr, addr + round_page(size), prot, false);
+}
+
+/*
  * uvm_km_free: free an area of kernel memory
  */