powerpc: Align thread->fpr to 16 bytes

On newer CPUs we use VSX loads and stores to the thread->fpr array.
For best performance we need to ensure 16 byte alignment.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

diff --git a/arch/powerpc/include/asm/processor.h b/arch/powerpc/include/asm/processor.h
index 2b5a39c..9fe1129 100644 (file)
--- a/arch/powerpc/include/asm/processor.h
+++ b/arch/powerpc/include/asm/processor.h
@@ -200,7 +200,7 @@ struct thread_struct {
 #endif
 #endif
        /* FP and VSX 0-31 register set */
-       double          fpr[32][TS_FPRWIDTH];
+       double          fpr[32][TS_FPRWIDTH] __attribute__((aligned(16)));
        struct {
 
                unsigned int pad;