From: David S. Miller <davem@sunset.davemloft.net>
Date: Fri, 17 Feb 2006 00:23:45 +0000 (-0800)
Subject: [SPARC64]: Fix return from trap on SUN4V.
X-Git-Tag: v3.12-rc1~38005^2~88
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=af02bec66294c76fba181c665c68a31fd4392020;p=kernel%2Fkernel-generic.git

[SPARC64]: Fix return from trap on SUN4V.

We need to set the global register set _AND_ disable
PSTATE_IE in %pstate.  The original patch sequence was
leaving PSTATE_IE enabled when returning to kernel mode,
oops.

This fixes the random register corruption being seen
on SUN4V.

Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/arch/sparc64/kernel/rtrap.S b/arch/sparc64/kernel/rtrap.S
index 551f719..1e724fe 100644
--- a/arch/sparc64/kernel/rtrap.S
+++ b/arch/sparc64/kernel/rtrap.S
@@ -234,8 +234,10 @@ rt_continue:	ldx			[%sp + PTREGS_OFF + PT_V9_G1], %g1
 
 		/* Normal globals are restored, go to trap globals.  */
 661:		wrpr			%g0, RTRAP_PSTATE_AG_IRQOFF, %pstate
-		.section		.sun4v_1insn_patch, "ax"
+		nop
+		.section		.sun4v_2insn_patch, "ax"
 		.word			661b
+		wrpr			%g0, RTRAP_PSTATE_IRQOFF, %pstate
 		SET_GL(1)
 		.previous