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From: John Baldwin <jhb@freebsd.org>
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Date: Fri, 30 May 2008 23:39:33 -0400
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Cc: 
Subject: tx(4) MPSAFE patch
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I have a patch to make tx(4) MPSAFE.  I do not have the hardware to test this 
however.  Unlike many of the previous patches, though, this driver appears to 
be for hardware that is not entirely ancient, so there is hopefully a decent 
chance someone can test this.

http://www.FreeBSD.org/~jhb/patches/tx.patch

-- 
John Baldwin