Revert last change. Add a comment to prevent further misunderstanding

* time.c (sys_nanosleep): Display remaining time only on interrupt.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 7 insertions, 1 deletions

diff --git a/time.c b/time.c
index 497be75f7..0c938f8ff 100644
--- a/time.c
+++ b/time.c
@@ -271,9 +271,15 @@ sys_nanosleep(struct tcb *tcp)
 		print_timespec(tcp, tcp->u_arg[0]);
 		tprints(", ");
 	} else {
-		if (!tcp->u_arg[1] || !is_restart_error(tcp))
+		/* Second (returned) timespec is only significant
+		 * if syscall was interrupted. We print only its address
+		 * on _success_, since kernel doesn't modify its value.
+		 */
+		if (is_restart_error(tcp) || !tcp->u_arg[1])
+			/* Interrupted (or NULL) */
 			print_timespec(tcp, tcp->u_arg[1]);
 		else
+			/* Success */
 			tprintf("%#lx", tcp->u_arg[1]);
 	}
 	return 0;