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From: Marcelo Tosatti <>
Subject: kernel read-write semaphores 
Date: 1999/05/14
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Jan-Simon advised me about the problems of using spinlocks "in" 
copy_from_user/put_user (see my patch to use read-write locks in UTS
I looked at the kernel and found nothing about read-write semaphores. 
Somebody already implemented this?


  - Marcelo

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