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From: Marcelo Tosatti <>
Subject: read-write mutexes
Date: 1999/09/23
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I've putted at 
a patch which adds read-write mutexes to the kernel.
I've also modified kernel/sys.c uts_sem semaphore to be a rwsem structure
and use read/write_down read/write_up in the files which use it.
The patch is not very well tested so there may be serious bugs in the
code. I'd like to someone with a SMP machine to test it.

Comments/patches are very welcome.

   - Marcelo

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