tree-wide: fix assorted typos all over the place

That is "success", "unknown", "through", "performance", "[re|un]mapping"
, "access", "default", "reasonable", "[con]currently", "temperature"
, "channel", "[un]used", "application", "example","hierarchy", "therefore"
, "[over|under]flow", "contiguous", "threshold", "enough" and others.

Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index a074fce..42e65cf 100644
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -5,7 +5,7 @@
  *
  *  Added devfs support. 
  *    Jan-11-1998, C. Scott Ananian <cananian@alumni.princeton.edu>
- *  Shared /dev/zero mmaping support, Feb 2000, Kanoj Sarcar <kanoj@sgi.com>
+ *  Shared /dev/zero mmapping support, Feb 2000, Kanoj Sarcar <kanoj@sgi.com>
  */
 
 #include <linux/mm.h>
diff --git a/drivers/char/mspec.c b/drivers/char/mspec.c
index 1997270..ecb89d7 100644
--- a/drivers/char/mspec.c
+++ b/drivers/char/mspec.c
@@ -248,7 +248,7 @@
 /*
  * mspec_mmap
  *
- * Called when mmaping the device.  Initializes the vma with a fault handler
+ * Called when mmapping the device.  Initializes the vma with a fault handler
  * and private data structure necessary to allocate, track, and free the
  * underlying pages.
  */
diff --git a/drivers/char/n_r3964.c b/drivers/char/n_r3964.c
index 6934025..c1d8b54 100644
--- a/drivers/char/n_r3964.c
+++ b/drivers/char/n_r3964.c
@@ -602,7 +602,7 @@
 		}
 		break;
 	case R3964_WAIT_FOR_RX_REPEAT:
-		/* FALLTROUGH */
+		/* FALLTHROUGH */
 	case R3964_IDLE:
 		if (c == STX) {
 			/* Prevent rx_queue from overflow: */
diff --git a/drivers/char/rio/route.h b/drivers/char/rio/route.h
index 20ed73f..46e9637 100644
--- a/drivers/char/rio/route.h
+++ b/drivers/char/rio/route.h
@@ -67,7 +67,7 @@
 typedef struct COST_ROUTE COST_ROUTE;
 struct COST_ROUTE {
 	unsigned char cost;	/* Cost down this link */
-	unsigned char route[NODE_BYTES];	/* Nodes thorough this route */
+	unsigned char route[NODE_BYTES];	/* Nodes through this route */
 };
 
 typedef struct ROUTE_STR ROUTE_STR;