RE: Oops from local semaphore race condition

[Ron Niles]

[e-mail] said:
>> Then I realized it can possibly go corrupt, due to a race condition
>> which lets down() continue before up() is complete:

From: David Woodhouse [mailto:[e-mail]]

>This is what completions were added for.

Thanks, struct completion is the best way; it's gonna be tough to maintain
backward compatibility though.

One comment; it looks like the implementation in sched.c should more
properly be using wq_write_lock_irqsave on the lock.