Minor typos

[Michal Belczyk]

Just a couple of minor typos in comments...

-- 
Michal Belczyk
Index: i386/i386/mplock.s
===================================================================
RCS file: /home/dcvs/src/sys/i386/i386/mplock.s,v
retrieving revision 1.18
diff -u -r1.18 mplock.s
--- i386/i386/mplock.s	3 Nov 2005 23:45:11 -0000	1.18
+++ i386/i386/mplock.s	11 Dec 2005 15:41:39 -0000
@@ -46,7 +46,7 @@
  * lock operations can occur outside a critical section with interrupts
  * enabled with the provisio (which the routines below handle) that an
  * interrupt may come along and preempt us, racing our cmpxchgl instruction
- * to perform the operation we have requested by pre-dispoing td_mpcount.
+ * to perform the operation we have requested by pre-disposing td_mpcount.
  *
  * Additionally, the LWKT threading system manages the MP lock and
  * lwkt_switch(), in particular, may be called after pre-disposing td_mpcount
Index: kern/kern_timeout.c
===================================================================
RCS file: /home/dcvs/src/sys/kern/kern_timeout.c,v
retrieving revision 1.20
diff -u -r1.20 kern_timeout.c
--- kern/kern_timeout.c	4 Nov 2005 19:28:21 -0000	1.20
+++ kern/kern_timeout.c	11 Dec 2005 15:42:01 -0000
@@ -527,7 +527,7 @@
 /*
  * Prepare a callout structure for use by callout_reset() and/or 
  * callout_stop().  The MP version of this routine requires that the callback
- * function installed by callout_reset() by MP safe.
+ * function installed by callout_reset() be MP safe.
  */
 void
 callout_init(struct callout *c)
Index: kern/usched_bsd4.c
===================================================================
RCS file: /home/dcvs/src/sys/kern/usched_bsd4.c,v
retrieving revision 1.6
diff -u -r1.6 usched_bsd4.c
--- kern/usched_bsd4.c	21 Nov 2005 21:59:50 -0000	1.6
+++ kern/usched_bsd4.c	11 Dec 2005 15:42:35 -0000
@@ -190,11 +190,11 @@
 
 /*
  * chooseproc() is called when a cpu needs a user process to LWKT schedule,
- * it selects a user process and returns it.  If chkp is non-NULL and chkp
- * has a better or equal then the process that would otherwise be
+ * it selects a user process and returns it.  If chklp is non-NULL and chklp
+ * has a better or equal priority then the process that would otherwise be
  * chosen, NULL is returned.
  *
- * Until we fix the RUNQ code the chkp test has to be strict or we may
+ * Until we fix the RUNQ code the chklp test has to be strict or we may
  * bounce between processes trying to acquire the current process designation.
  */
 static