--- zzzz-none-000/linux-3.10.107/drivers/spi/spi-bitbang.c	2017-06-27 09:49:32.000000000 +0000
+++ vr9-7490-729/linux-3.10.107/drivers/spi/spi-bitbang.c	2021-11-10 11:53:55.000000000 +0000
@@ -268,7 +268,6 @@
 		struct spi_device	*spi;
 		unsigned		nsecs;
 		struct spi_transfer	*t = NULL;
-		unsigned		tmp;
 		unsigned		cs_change;
 		int			status;
 		int			do_setup = -1;
@@ -283,7 +282,6 @@
 		nsecs = 100;
 
 		spi = m->spi;
-		tmp = 0;
 		cs_change = 1;
 		status = 0;
 
@@ -332,7 +330,7 @@
 			}
 			if (status > 0)
 				m->actual_length += status;
-			if (status != t->len) {
+			if (status != (int)t->len) {
 				/* always report some kind of error */
 				if (status >= 0)
 					status = -EREMOTEIO;