diff -up ./drivers/mailbox/pcc.c.pcc ./drivers/mailbox/pcc.c

--- ./drivers/mailbox/pcc.c.pcc	2018-03-22 06:40:12.000000000 +0900

+++ ./drivers/mailbox/pcc.c	2018-04-16 16:58:39.000000000 +0900

@@ -172,7 +172,7 @@ static bool pcc_tx_done(struct mbox_chan

 {

 	struct acpi_pcct_hw_reduced *pcct_ss = chan->con_priv;

 	struct acpi_pcct_shared_memory *generic_comm_base =

-		(struct acpi_pcct_shared_memory *) pcct_ss->base_address;

+		(struct acpi_pcct_shared_memory *) (unsigned long) pcct_ss->base_address;

 	u16 cmd_delay = pcct_ss->latency;

 	unsigned int retries = 0;

@@ -207,7 +207,7 @@ static int pcc_send_data(struct mbox_cha

 {

 	struct acpi_pcct_hw_reduced *pcct_ss = chan->con_priv;

 	struct acpi_pcct_shared_memory *generic_comm_base =

-		(struct acpi_pcct_shared_memory *) pcct_ss->base_address;

+		(struct acpi_pcct_shared_memory *) (unsigned long) pcct_ss->base_address;

 	struct acpi_generic_address doorbell;

 	u64 doorbell_preserve;

 	u64 doorbell_val;