Bug man page futex(2) FUTEX_CMP_REQUEUE

Man page http://man7.org/linux/man-pages/man2/futex.2.html
states for FUTEX_CMP_REQUEUE

Typical values to specify for val are 0 or 1.

How is a value of 0 useful?

(Specifying
INT_MAX is not useful, because it would make the FUTEX_CMP_REQUEUE operation equivalent to FUTEX_WAKE.)

This is incorrect because FUTEX_WAKE doesn't have the expected (val3) parameter.

Same for the remark that follows this statement after "The
limit value specified via val2 is typically either 1 or INT_MAX.":

(Specifying the argument as 0 is not useful, because it would make the FUTEX_CMP_REQUEUE operation equivalent to FUTEX_WAIT.)

Carlo Wood <[email protected]>