futex/lock: simplify a little futex_wait_if_cond()

Impact: cleanup, improve readability
Signed-off-by: Dmitry Safonov <dsafonov@virtuozzo.com>
Acked-by: Andrei Vagin <avagin@virtuozzo.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

criu/include/lock.h

@@ -53,7 +53,7 @@ static inline void futex_set(futex_t *f, u32 v)
 								\
 		while (1) {					\
 			struct timespec to = {.tv_sec = 120};	\
-			tmp = (u32)atomic_read(&(__f)->raw);	\
+			tmp = futex_get(__f);			\
 			if ((tmp & FUTEX_ABORT_FLAG) ||		\
 			    (tmp __cond (__v)))			\
 				break;				\