tree 1b5351a83913d1c583912b933ad838d2a024286b
parent 4b1c486b3587d2abf50bee4a05eb488cd4045f2c
author Darren Hart <dvhltc@us.ibm.com> 1238791192 -0700
committer Thomas Gleixner <tglx@linutronix.de> 1239009241 +0200

futex: split out atomic logic from futex_lock_pi()

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>