long vs. unsigned long - low-hanging fruits in drivers

deal with signedness of the stuff passed to set_bit() et.al.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/net/wan/cosa.c b/drivers/net/wan/cosa.c
index 26058b4..ff37bf4 100644
--- a/drivers/net/wan/cosa.c
+++ b/drivers/net/wan/cosa.c
@@ -154,8 +154,8 @@
 	int nchannels;			/* # of channels on this card */
 	int driver_status;		/* For communicating with firmware */
 	int firmware_status;		/* Downloaded, reseted, etc. */
-	long int rxbitmap, txbitmap;	/* Bitmap of channels who are willing to send/receive data */
-	long int rxtx;			/* RX or TX in progress? */
+	unsigned long rxbitmap, txbitmap;/* Bitmap of channels who are willing to send/receive data */
+	unsigned long rxtx;		/* RX or TX in progress? */
 	int enabled;
 	int usage;				/* usage count */
 	int txchan, txsize, rxsize;