futex: split out atomic logic from futex_lock_pi()

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Refactor the atomic portion of futex_lock_pi() into futex_lock_pi_atomic().

This logic will be needed by requeue_pi, so modularize it to reduce
code duplication.  The only significant change is passing of the task
to try and take the lock for.  This simplifies the -EDEADLK test as if
the lock is owned by task t, it's a deadlock, regardless of if we are
doing requeue pi or not.  This patch updates the corresponding comment
accordingly.

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

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Darren Hart 2009-04-03 13:39:52 -07:00 • committed by Thomas Gleixner

parent 4b1c486b35

commit 1a52084d09

1 changed files with 130 additions and 94 deletions

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kernel/futex.c

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