futex: fixup unlocked requeue pi case

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Thomas's testing caught a problem when the requeue target futex is
unowned and multiple tasks are requeued to it. This patch ensures
the FUTEX_WAITERS bit gets set if futex_requeue() will requeue one
or more tasks in addition to the one acquiring the lock.

Signed-off-by: Darren Hart <dvhltc@us.ibm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

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Darren Hart 2009-04-07 23:23:50 -07:00 • committed by Thomas Gleixner

parent 52400ba946

commit bab5bc9e85

1 changed files with 44 additions and 21 deletions

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kernel/futex.c

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