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>
mariux64 · May 17, 2014 · 5aa4ecf · 5aa4ecf
1 parent b18eb2d
commit 5aa4ecf
Showing 1 changed file with 1 addition and 0 deletions.
diff --git 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