HelenOS sources

futex_up           98 uspace/lib/c/generic/io/kio.c 	futex_up(&kio_buffer.futex);
futex_up           90 uspace/lib/c/generic/private/futex.h #define futex_unlock(fut)   (void) futex_up((fut))
futex_up          181 uspace/lib/c/generic/private/futex.h 		futex_up(futex);
futex_up          122 uspace/lib/c/generic/thread/fibril.c 		futex_up(&ready_semaphore);
futex_up          108 uspace/lib/c/generic/thread/futex.c 	futex_up(futex);