zdtm/lock: make futex_inc and futex_dec atomical

Signed-off-by: Andrey Vagin <avagin@openvz.org>
Acked-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

test/zdtm/lib/lock.h

@@ -83,10 +83,10 @@ static inline void futex_dec_and_wake(futex_t *f)
 }
 
 /* Plain increment futex @f value */
-static inline void futex_inc(futex_t *f) { f->raw++; }
+static inline void futex_inc(futex_t *f) { atomic_inc(&f->raw); }
 
 /* Plain decrement futex @f value */
-static inline void futex_dec(futex_t *f) { f->raw--; }
+static inline void futex_dec(futex_t *f) { atomic_dec(&f->raw); }
 
 /* Wait until futex @f value become @v */
 static inline void futex_wait_until(futex_t *f, uint32_t v)