Index: util-linux-ng-2.14.2-rc2/schedutils/ionice.c
===================================================================
--- util-linux-ng-2.14.2-rc2.orig/schedutils/ionice.c	2009-01-22 12:32:48.000000000 +0100
+++ util-linux-ng-2.14.2-rc2/schedutils/ionice.c	2009-02-05 17:53:20.000000000 +0100
@@ -115,8 +115,12 @@ int main(int argc, char *argv[])
 		}
 	} else {
 		if (ioprio_set(IOPRIO_WHO_PROCESS, pid, ioprio | ioprio_class << IOPRIO_CLASS_SHIFT) == -1) {
-			perror("ioprio_set");
-			exit(EXIT_FAILURE);
+			if (errno == ENOSYS)
+				fprintf(stderr, "Warning: omitting unsupported ioprio_set() call\n");
+			else {
+				perror("ioprio_set");
+				exit(EXIT_FAILURE);
+			}
 		}
 
 		if (argv[optind]) {