On Thu, 15 Dec 2005, Thomas Gleixner wrote: > > Well, depends on the POV. A counting sempahore is a different beast than > a mutex. At least as far as my limited knowledge of concurrency controls > goes. A real semaphore is counting. Dammit, unless the pure mutex has a _huge_ performance advantage on major architectures, we're not changing it. There's absolutely zero point. A counting semaphore is a perfectly fine mutex - the fact that it can _also_ be used to allow more than 1 user into a critical region and generally do other things is totally immaterial. It's _extra_ stupid to re-use the names "down()" and "up()" on a non-counting mutex, since then the names make zero sense at all. Use "lock_mutex()" and "unlock_mutex()" or something, and don't break existing code for no measurable gain. Linus - 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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