linux-kernel - [PATCH 18/24] i386: convert hardware exception 19 to an interrupt gate

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Message-Id: <1220990178-29773-19-git-send-email-heukelum@fastmail.fm>
Date:	Tue,  9 Sep 2008 21:56:12 +0200
From:	heukelum@...tmail.fm
To:	linux-kernel@...r.kernel.org, mingo@...e.hu, ak@...e.de
Cc:	Alexander van Heukelum <heukelum@...tmail.fm>
Subject: [PATCH 18/24] i386: convert hardware exception 19 to an interrupt gate

From: Alexander van Heukelum <heukelum@...tmail.fm>

Handle SIMD coprocessor exception with interrupt initially off.

Signed-off-by: Alexander van Heukelum <heukelum@...tmail.fm>
---
 arch/x86/kernel/traps_32.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kernel/traps_32.c b/arch/x86/kernel/traps_32.c
index f696914..1ad7697 100644
--- a/arch/x86/kernel/traps_32.c
+++ b/arch/x86/kernel/traps_32.c
@@ -1142,6 +1142,8 @@ static void simd_math_error(void __user *ip)
 
 void do_simd_coprocessor_error(struct pt_regs *regs, long error_code)
 {
+	conditional_sti(regs);
+
 	if (cpu_has_xmm) {
 		/* Handle SIMD FPU exceptions on PIII+ processors. */
 		ignore_fpu_irq = 1;
@@ -1292,7 +1294,7 @@ void __init trap_init(void)
 #ifdef CONFIG_X86_MCE
 	set_intr_gate(18, &machine_check);
 #endif
-	set_trap_gate(19, &simd_coprocessor_error);
+	set_intr_gate(19, &simd_coprocessor_error);
 
 	if (cpu_has_fxsr) {
 		printk(KERN_INFO "Enabling fast FPU save and restore... ");
-- 
1.5.4.3

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