Merge pull request #2013 from martin-frbg/issue2011

Fix invalid memory access in PPC gemm_beta

Author: martin-frbg

kernel/power/gemm_beta.S

@@ -129,7 +129,7 @@ LL(12):
 	STFD	f0,  14 * SIZE(CO1)
 	STFD	f0,  15 * SIZE(CO1)
 
-	dcbst	PRE, CO1
+	dcbtst	PRE, CO1
 	addi	CO1, CO1,  16 * SIZE
 	bdnz	LL(12)
 	.align 4

kernel/power/zgemm_beta.S

@@ -134,7 +134,7 @@ LL(12):
 	STFD	f0,  14 * SIZE(CO1)
 	STFD	f0,  15 * SIZE(CO1)
 
-	dcbst	PRE, CO1
+	dcbtst	PRE, CO1
 	addi	CO1, CO1,  16 * SIZE
 	bdnz	LL(12)
 	.align 4