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

Kamal Mostafa
2014-09-15T22:18:19Z

From: "David S. Miller" <davem@davemloft.net>

[ 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@davemloft.net>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
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