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Subject: [PATCH] ppc64:Fix missing register in altivec context switch
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Andrew Morton <akpm@osdl.org>
Cc: Linus Torvalds <torvalds@osdl.org>,
       Linux Kernel list <linux-kernel@vger.kernel.org>
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Date: Mon, 13 Sep 2004 14:25:27 +1000
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This is a resend of a patch sent in July and that got lost somewhat,
the "VSCR" register wasn't restored properly from the context on
load_up_altivec (typo), please apply the fix:

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

===== arch/ppc64/kernel/head.S 1.76 vs edited =====
--- 1.76/arch/ppc64/kernel/head.S	2004-09-08 16:32:56 +10:00
+++ edited/arch/ppc64/kernel/head.S	2004-09-13 14:15:00 +10:00
@@ -1588,6 +1588,7 @@
 	li	r10,THREAD_VSCR
 	stw	r4,THREAD_USED_VR(r5)
 	lvx	vr0,r10,r5
+	mtvscr	vr0
 	REST_32VRS(0,r4,r5)
 #ifndef CONFIG_SMP
 	/* Update last_task_used_math to 'current' */