[PATCH 1/4] powerpc/47x: Make sure mcsr is cleared before enabling machine check interrupts

[Dave Kleikamp]

Clear the machine check syndrom register before enabling machine check
interrupts.  The initial state of the tlb can lead to parity errors being
flagged early after a cold boot.

Signed-off-by: Dave Kleikamp <shaggy at linux.vnet.ibm.com>
---
 arch/powerpc/kernel/head_44x.S |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/arch/powerpc/kernel/head_44x.S b/arch/powerpc/kernel/head_44x.S
index 5ab484e..562305b 100644
--- a/arch/powerpc/kernel/head_44x.S
+++ b/arch/powerpc/kernel/head_44x.S
@@ -113,6 +113,10 @@ _ENTRY(_start);
 	stw	r5, 0(r4)	/* Save abatron_pteptrs at a fixed location */
 	stw	r6, 0(r5)
 
+	/* Clear the Machine Check Syndrome Register */
+	li	r0,0
+	mtspr	SPRN_MCSR,r0
+
 	/* Let's move on */
 	lis	r4,start_kernel at h
 	ori	r4,r4,start_kernel at l
-- 
1.7.1