>I just found more information. There is a whole movement of converting semaphore to mutex in the kernel. One active contributor is "Daniel Walker", search for patch like "printer port driver: semaphore to mutex" etc.
And the explanation (which is the only I can find, still cannot explain very well the reason for the conversion IMHO) is contained in Documentation/mutex-design.txt). But this documentation also mentioned a lot of the dos and dont' about mutex.....read it....very informative.
Thanks for the information and have a nice weekend :-) Lukas
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