--- linux/include/linux/resource.h.old	2005-04-14 13:19:30.000000000 -0400
+++ linux/include/linux/resource.h	2005-04-14 13:19:48.000000000 -0400
@@ -19,6 +19,7 @@
 #define	RUSAGE_SELF	0
 #define	RUSAGE_CHILDREN	(-1)
 #define RUSAGE_BOTH	(-2)		/* sys_wait4() uses this */
+#define RUSAGE_THREAD	(-3)
 
 struct	rusage {
 	struct timeval ru_utime;	/* user time used */
--- linux/kernel/sys.c.old	2005-04-14 13:20:32.000000000 -0400
+++ linux/kernel/sys.c	2005-04-14 13:50:08.000000000 -0400
@@ -2037,6 +2037,17 @@
 			} while (t != p);
 			break;
 
+		case RUSAGE_THREAD:
+			utime = p->signal->utime;
+			stime = p->signal->stime;
+			utime = cputime_add(utime, t->utime);
+			stime = cputime_add(stime, t->stime);
+			r->ru_nvcsw += p->signal->nvcsw    + p->nvcsw;
+			r->ru_nivcsw += p->signal->nivcsw  + p->nivcsw;
+			r->ru_minflt += p->signal->min_flt + p->min_flt;
+			r->ru_majflt += p->signal->maj_flt + p->maj_flt;
+			break;
+
 		default:
 			BUG();
 	}
@@ -2057,7 +2071,7 @@
 
 asmlinkage long sys_getrusage(int who, struct rusage __user *ru)
 {
-	if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN)
+	if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN && who != RUSAGE_THREAD)
 		return -EINVAL;
 	return getrusage(current, who, ru);
 }