Re: [PATCH 1/19] MUTEX: Introduce simple mutex implementation

[David Howells]

Andrew Morton <akpm@xxxxxxxx> wrote:

> Look at it from the POV of major architectures: there's no way the new
> mutex code will be faster than down() and up()

I'm thinking of making the default implementation of mutexes a straight
wrapper around down() and up(). That way it'll be exactly the same as counting
semaphores, just with extra constraints when the debugging is enabled _and_
effectively extra inline documentation.

But! for archs where it does matter (and we have several - you might not care,
but others do), it can be overridden with something faster.

David
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