unregister_chrdev(): ignore the return value

unregister_chrdev() always returns 0.  There is no need to check the return
value.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/cris/arch-v10/drivers/pcf8563.c b/arch/cris/arch-v10/drivers/pcf8563.c
index d47cfbf..1de0026 100644
--- a/arch/cris/arch-v10/drivers/pcf8563.c
+++ b/arch/cris/arch-v10/drivers/pcf8563.c
@@ -180,9 +180,7 @@
 void __exit
 pcf8563_exit(void)
 {
-	if (unregister_chrdev(PCF8563_MAJOR, DEVICE_NAME) < 0) {
-		printk(KERN_INFO "%s: Unable to unregister device.\n", PCF8563_NAME);
-	}
+	unregister_chrdev(PCF8563_MAJOR, DEVICE_NAME);
 }
 
 /*
diff --git a/arch/cris/arch-v32/drivers/pcf8563.c b/arch/cris/arch-v32/drivers/pcf8563.c
index fa8d500..da479a1 100644
--- a/arch/cris/arch-v32/drivers/pcf8563.c
+++ b/arch/cris/arch-v32/drivers/pcf8563.c
@@ -193,9 +193,7 @@
 void __exit
 pcf8563_exit(void)
 {
-	if (unregister_chrdev(PCF8563_MAJOR, DEVICE_NAME) < 0) {
-		printk(KERN_INFO "%s: Unable to unregister device.\n", PCF8563_NAME);
-	}
+	unregister_chrdev(PCF8563_MAJOR, DEVICE_NAME);
 }
 
 /*
diff --git a/arch/sparc64/solaris/socksys.c b/arch/sparc64/solaris/socksys.c
index e94f6e5..7736411 100644
--- a/arch/sparc64/solaris/socksys.c
+++ b/arch/sparc64/solaris/socksys.c
@@ -199,6 +199,5 @@
 
 void __exit cleanup_socksys(void)
 {
-	if (unregister_chrdev(30, "socksys"))
-		printk ("Couldn't unregister socksys character device\n");
+	unregister_chrdev(30, "socksys");
 }