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/char/dsp56k.c b/drivers/char/dsp56k.c
index acbfe1c..a69c652 100644
--- a/drivers/char/dsp56k.c
+++ b/drivers/char/dsp56k.c
@@ -136,7 +136,7 @@
 
 
 static struct dsp56k_device {
-	long in_use;
+	unsigned long in_use;
 	long maxio, timeout;
 	int tx_wsize, rx_wsize;
 } dsp56k;
diff --git a/drivers/char/rio/host.h b/drivers/char/rio/host.h
index 23d0681..78f2454 100644
--- a/drivers/char/rio/host.h
+++ b/drivers/char/rio/host.h
@@ -99,7 +99,7 @@
 	struct UnixRup UnixRups[MAX_RUP + LINKS_PER_UNIT];
 	int timeout_id;				/* For calling 100 ms delays */
 	int timeout_sem;			/* For calling 100 ms delays */
-	long locks;				/* long req'd for set_bit --RR */
+	unsigned long locks;			/* long req'd for set_bit --RR */
 	char ____end_marker____;
 };
 #define Control      CardP->DpControl
diff --git a/drivers/char/riscom8.h b/drivers/char/riscom8.h
index 6317aad..9cc1313 100644
--- a/drivers/char/riscom8.h
+++ b/drivers/char/riscom8.h
@@ -71,7 +71,7 @@
 	struct tty_struct 	* tty;
 	int			count;
 	int			blocked_open;
-	long			event; /* long req'd for set_bit --RR */
+	unsigned long		event; /* long req'd for set_bit --RR */
 	int			timeout;
 	int			close_delay;
 	unsigned char 		* xmit_buf;
diff --git a/drivers/char/sx.h b/drivers/char/sx.h
index 432aad0..70d9783 100644
--- a/drivers/char/sx.h
+++ b/drivers/char/sx.h
@@ -27,7 +27,7 @@
   int                     c_dcd;
   struct sx_board         *board;
   int                     line;
-  long                    locks;
+  unsigned long           locks;
 };
 
 struct sx_board {
@@ -45,7 +45,7 @@
   int poll;
   int ta_type;
   struct timer_list       timer;
-  long                    locks;
+  unsigned long           locks;
 };
 
 struct vpd_prom {