- Corrrect mispellings of word useful

Submitted by:	Christoph Mallon <christoph.mallon@gmx.de> (via private mail)

sys/cam/cam_periph.h

@@ -90,7 +90,7 @@ typedef enum {
 	CAM_PERIPH_BIO
 } cam_periph_type;
 
-/* Generically usefull offsets into the peripheral private area */
+/* Generically useful offsets into the peripheral private area */
 #define ppriv_ptr0 periph_priv.entries[0].ptr
 #define ppriv_ptr1 periph_priv.entries[1].ptr
 #define ppriv_field0 periph_priv.entries[0].field

sys/dev/bktr/CHANGELOG.TXT

@@ -285,7 +285,7 @@
                     Fix row=0/columns=0 bug. From Randal Hopper<aa8vb@ipass.net>
                     Add option to block the reset of the MSP34xx audio chip by
                     adding options BKTR_NO_MSP_RESET to the kernel config file.
-                    This is usefull if you run another operating system
+                    This is useful if you run another operating system
                     first to initialise the audio chip, then do a soft reboot.
                     Added for Yuri Gindin <yuri@xpert.com>
 

sys/dev/bktr/bktr_os.c

@@ -404,7 +404,7 @@ bktr_attach( device_t dev )
 
 #if defined( BKTR_SIS_VIA_MODE )
 	if (bootverbose) printf("Using SiS/VIA chipset compatibilty mode\n");
-        fun = fun | 4;	/* Enable SiS/VIA compatibility mode (usefull for
+        fun = fun | 4;	/* Enable SiS/VIA compatibility mode (useful for
                            OPTi chipset motherboards too */
 #endif
 	pci_write_config(dev, 0x40, fun, 2);

sys/dev/ppbus/ppbconf.c

@@ -531,7 +531,7 @@ ppb_request_bus(device_t bus, device_t dev, int how)
 
 			/* restore the context of the device
 			 * The first time, ctx.valid is certainly false
-			 * then do not change anything. This is usefull for
+			 * then do not change anything. This is useful for
 			 * drivers that do not set there operating mode
 			 * during attachement
 			 */

sys/dev/sound/pcm/dsp.c

@@ -2011,7 +2011,7 @@ dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode,
 	 * OSSv4 docs:  "All errors and counters will automatically be
 	 * cleared to zeroes after the call so each call will return only
 	 * the errors that occurred after the previous invocation. ... The
-	 * play_underruns and rec_overrun fields are the only usefull fields
+	 * play_underruns and rec_overrun fields are the only useful fields
 	 * returned by OSS 4.0."
 	 */
 		{

sys/netinet/tcp_subr.c

@@ -1060,7 +1060,7 @@ tcp_drain(void)
 	 * XXX: The "Net/3" implementation doesn't imply that the TCP
 	 *      reassembly queue should be flushed, but in a situation
 	 *	where we're really low on mbufs, this is potentially
-	 *	usefull.
+	 *	useful.
 	 */
 		INP_INFO_RLOCK(&V_tcbinfo);
 		LIST_FOREACH(inpb, V_tcbinfo.ipi_listhead, inp_list) {

sys/pci/ncr.c

@@ -4857,7 +4857,7 @@ static void ncr_getsync(ncb_p np, u_char sfac, u_char *fakp, u_char *scntl3p)
 	*/
 	fak = (kpc - 1) / div_10M[div] + 1;
 
-#if 0	/* You can #if 1 if you think this optimization is usefull */
+#if 0	/* You can #if 1 if you think this optimization is useful */
 
 	per = (fak * div_10M[div]) / clk;