diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
index 86aff1cb8a0d858c8916c8900de28927a7008b76..cce7f69b4ba1d56f12644e796aef6f3f307b161b 100644
--- a/arch/powerpc/kernel/rtas.c
+++ b/arch/powerpc/kernel/rtas.c
@@ -75,7 +75,7 @@ static struct rtas_args rtas_args;
 DEFINE_SPINLOCK(rtas_data_buf_lock);
 EXPORT_SYMBOL_GPL(rtas_data_buf_lock);
 
-char rtas_data_buf[RTAS_DATA_BUF_SIZE] __cacheline_aligned;
+char rtas_data_buf[RTAS_DATA_BUF_SIZE] __aligned(SZ_4K);
 EXPORT_SYMBOL_GPL(rtas_data_buf);
 
 unsigned long rtas_rmo_buf;