svn commit: r354887 - stable/12/sys/amd64/amd64
Konstantin Belousov
kib at FreeBSD.org
Wed Nov 20 10:25:50 UTC 2019
Author: kib
Date: Wed Nov 20 10:25:50 2019
New Revision: 354887
URL: https://svnweb.freebsd.org/changeset/base/354887
Log:
MFC r354788:
amd64 copyout: remove irrelevant comment.
Modified:
stable/12/sys/amd64/amd64/support.S
Directory Properties:
stable/12/ (props changed)
Modified: stable/12/sys/amd64/amd64/support.S
==============================================================================
--- stable/12/sys/amd64/amd64/support.S Wed Nov 20 08:56:01 2019 (r354886)
+++ stable/12/sys/amd64/amd64/support.S Wed Nov 20 10:25:50 2019 (r354887)
@@ -671,13 +671,7 @@ END(fillw)
movq $copy_fault,PCB_ONFAULT(%r11)
/*
- * Check explicitly for non-user addresses. If 486 write protection
- * is being used, this check is essential because we are in kernel
- * mode so the h/w does not provide any protection against writing
- * kernel addresses.
- */
-
- /*
+ * Check explicitly for non-user addresses.
* First, prevent address wrapping.
*/
movq %rsi,%rax
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