From: David S. Miller <davem@davemloft.net>
Date: Sat, 17 May 2014 18:28:05 +0000 (-0700)
Subject: sparc64: Add membar to Niagara2 memcpy code.
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=5aa4ecfd0ddb1e6dcd1c886e6c49677550f581aa;p=linux-beck.git

sparc64: Add membar to Niagara2 memcpy code.

This is the prevent previous stores from overlapping the block stores
done by the memcpy loop.

Based upon a glibc patch by Jose E. Marchesi

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

diff --git a/arch/sparc/lib/NG2memcpy.S b/arch/sparc/lib/NG2memcpy.S
index 2c20ad63ddbf..30eee6e8a81b 100644
--- a/arch/sparc/lib/NG2memcpy.S
+++ b/arch/sparc/lib/NG2memcpy.S
@@ -236,6 +236,7 @@ FUNC_NAME:	/* %o0=dst, %o1=src, %o2=len */
 	 */
 	VISEntryHalf
 
+	membar		#Sync
 	alignaddr	%o1, %g0, %g0
 
 	add		%o1, (64 - 1), %o4