On Fri, 2005-12-16 at 13:41 -0800, Linus Torvalds wrote: > > > > No one. It's not really a mutex, but a completion. > > > > Well, then let us use a completion and not some semantically wrong > > workaround > > It is _not_ wrong to have a semaphore start out in locked state. > > For example, it makes perfect sense if the data structures that the > semaphore needs need initialization. The way you _should_ handle that is > to make the semaphore come up as locked, and the data structures in some > "don't matter" state, and then the thing that initializes stuff can do so > properly and then release the semaphore. > > Yes, in some cases such a locked semaphore is only used once, and ends up > being a "completion", but that doesn't invalidate the fact that this is > a perfectly fine way to handle a real issue. Well, in case of a semaphore it is a semantically correct use case. In case of of a mutex it is not. Gerd was talking about a mutex. The fact that a mutex is implemented on top (or on actually the same) mechanism as a semaphore - for what ever reason - does not change the semantical difference between semaphores and mutexes. tglx - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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