fixes:
implicit declaration of function kzalloc

--- linux-2.6.34.noarch/drivers/usb/serial/qcserial.c~	2010-06-08 15:19:41.000000000 -0400
+++ linux-2.6.34.noarch/drivers/usb/serial/qcserial.c	2010-06-08 15:19:47.000000000 -0400
@@ -11,6 +11,7 @@
  *
  */
 
+#include <linux/slab.h>
 #include <linux/tty.h>
 #include <linux/tty_flip.h>
 #include <linux/usb.h>