--- zzzz-none-000/linux-3.10.107/drivers/ssb/sdio.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/ssb/sdio.c	2021-02-04 17:41:59.000000000 +0000
@@ -200,7 +200,7 @@
 }
 
 /* host must be already claimed */
-int ssb_sdio_switch_core(struct ssb_bus *bus, struct ssb_device *dev)
+static int ssb_sdio_switch_core(struct ssb_bus *bus, struct ssb_device *dev)
 {
 	u8 coreidx = dev->core_index;
 	u32 sbaddr;