[src/trunk]: src/sys/arch/mips/mips Don't need the errata workaround on user ...

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

details:   https://anonhg.NetBSD.org/src/rev/c8fb1683069a
branches:  trunk
changeset: 826186:c8fb1683069a
user:      maya <maya%NetBSD.org@localhost>
date:      Sun Aug 20 09:21:54 2017 +0000

description:
Don't need the errata workaround on user return
It's reported that the MMU will block such invalid reads in userland,
and it's only needed on entry.

diffstat:

 sys/arch/mips/mips/mipsX_subr.S |  6 +-----
 1 files changed, 1 insertions(+), 5 deletions(-)

diffs (20 lines):

diff -r 6571b6948109 -r c8fb1683069a sys/arch/mips/mips/mipsX_subr.S
--- a/sys/arch/mips/mips/mipsX_subr.S   Sun Aug 20 09:00:15 2017 +0000
+++ b/sys/arch/mips/mips/mipsX_subr.S   Sun Aug 20 09:21:54 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: mipsX_subr.S,v 1.102 2017/08/08 09:34:59 maya Exp $    */
+/*     $NetBSD: mipsX_subr.S,v 1.103 2017/08/20 09:21:54 maya Exp $    */
 
 /*
  * Copyright 2002 Wasabi Systems, Inc.
@@ -2655,10 +2655,6 @@
        REG_L   s6, CALLFRAME_SIZ+TF_REG_S6(sp)         # $22
        REG_L   s7, CALLFRAME_SIZ+TF_REG_S7(sp)         # $23
        REG_L   s8, CALLFRAME_SIZ+TF_REG_S8(sp)         # $30
-#ifdef MIPS3_LOONGSON2
-       li      t0, (MIPS_DIAG_ITLB_CLEAR | MIPS_DIAG_BTB_CLEAR | MIPS_DIAG_RAS_DISABLE)
-       mtc0    t0, MIPS_COP_0_DIAG
-#endif
 MIPSX(user_intr_return):
 #ifdef PARANOIA
        PTR_L   t0, L_CPU(MIPS_CURLWP)