[PATCH 3.13 028/187] sparc64: Add membar to Niagara2 memcpy code.

From: Kamal Mostafa
Date: Mon Sep 15 2014 - 18:18:23 EST


3.13.11.7 -stable review patch. If anyone has any objections, please let me know.

------------------

From: "David S. Miller" <davem@xxxxxxxxxxxxx>

[ Upstream commit 5aa4ecfd0ddb1e6dcd1c886e6c49677550f581aa ]

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@xxxxxxxxxxxxx>
Signed-off-by: Kamal Mostafa <kamal@xxxxxxxxxxxxx>
---
arch/sparc/lib/NG2memcpy.S | 1 +
1 file changed, 1 insertion(+)

diff --git a/arch/sparc/lib/NG2memcpy.S b/arch/sparc/lib/NG2memcpy.S
index 2c20ad6..30eee6e 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
--
1.9.1

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