*: rename ATTRIBUTE_XXX to just XXX.

diff --git a/loginutils/vlock.c b/loginutils/vlock.c
index 3ce40dd..442272a 100644
--- a/loginutils/vlock.c
+++ b/loginutils/vlock.c
@@ -18,21 +18,21 @@
 #include <sys/vt.h>
 #include "libbb.h"
 
-static void release_vt(int signo ATTRIBUTE_UNUSED)
+static void release_vt(int signo UNUSED_PARAM)
 {
 	/* If -a, param is 0, which means:
 	 * "no, kernel, we don't allow console switch away from us!" */
 	ioctl(STDIN_FILENO, VT_RELDISP, (unsigned long) !option_mask32);
 }
 
-static void acquire_vt(int signo ATTRIBUTE_UNUSED)
+static void acquire_vt(int signo UNUSED_PARAM)
 {
 	/* ACK to kernel that switch to console is successful */
 	ioctl(STDIN_FILENO, VT_RELDISP, VT_ACKACQ);
 }
 
 int vlock_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int vlock_main(int argc ATTRIBUTE_UNUSED, char **argv)
+int vlock_main(int argc UNUSED_PARAM, char **argv)
 {
 	struct vt_mode vtm;
 	struct termios term;