Messages in this thread |  | | Date | Fri, 30 Aug 2002 19:16:27 +0200 (CEST) | From | Ingo Molnar <> | Subject | Re: [patch] scheduler fixes, 2.5.32-BK |
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we used to have the global semaphore_lock - which, if used separately from the waitqueue lock, indeed can cause the unuse of the semaphore structure before the spin_unlock in wakeup() completes.
but since 2.5.25 or so we use the semaphore waitqueue's spinlock for semaphore locking - this also neatly solves the semaphore-unuse problem. Four architectures, sparc, ia64, arm and x86-64 still use the global semaphore_lock, but the other 13 architectures use the waitqueue spinlock already.
(unless there's something else i missed.)
Ingo
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