Use of the time_after() macro, defined at linux/jiffies.h, which deal
with wrapping correctly and are nicer to read.

Signed-off-by: Marcelo Feitoza Parisi <marcelo@feitoza.com.br>

--- linux/drivers/net/wan/sdla_ppp.c	2005-06-17 16:48:29.000000000 -0300
+++ linux-kj/drivers/net/wan/sdla_ppp.c	2005-07-07 22:46:45.547173016 -0300
@@ -101,6 +101,7 @@
 #include <linux/if_arp.h>	/* ARPHRD_* defines */
 #include <asm/byteorder.h>	/* htons(), etc. */
 #include <linux/in.h>		/* sockaddr_in */
+#include <linux/jiffies.h>	/* time_after() macro */
 
 
 #include <asm/uaccess.h>
@@ -482,7 +483,7 @@
 		if(ppp_priv_area->update_comms_stats == 0){
 			break;
 		}
-                if ((jiffies - timeout) > (1 * HZ)){
+                if (time_after(jiffies, timeout + 1 * HZ)){
     			ppp_priv_area->update_comms_stats = 0;
  			ppp_priv_area->timer_int_enabled &=
 				~TMR_INT_ENABLED_UPDATE;