tree bae8ffeb2425412c0bffbdf728b45104fe3178f2
parent 3e1d7a6219ab64e13b10b1a77c0625db9a8bd8db
author Thomas Gleixner <tglx@linutronix.de> 1227204173 -0800
committer Thomas Gleixner <tglx@linutronix.de> 1227553240 +0100

futex: make clock selectable for FUTEX_WAIT_BITSET

FUTEX_WAIT_BITSET could be used instead of FUTEX_WAIT by setting the
bit set to FUTEX_BITSET_MATCH_ANY, but FUTEX_WAIT uses CLOCK_REALTIME
while FUTEX_WAIT_BITSET uses CLOCK_MONOTONIC.

Add a flag to select CLOCK_REALTIME for FUTEX_WAIT_BITSET so glibc can
replace the FUTEX_WAIT logic which needs to do gettimeofday() calls
before and after the syscall to convert the absolute timeout to a
relative timeout for FUTEX_WAIT.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Ulrich Drepper <drepper@redhat.com>