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From: John Baldwin <jhb@freebsd.org>
To: freebsd-stable@freebsd.org
Subject: [PATCH] Switch pst(4) to callout(9): test or the driver will be
 removed
Date: Wed, 08 Oct 2014 14:48:36 -0400
Message-ID: <13804039.OhSEeCZFjP@ralph.baldwin.cx>
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This patch switches the pst(4) driver from timeout(9) to callout(9).  It also 
cleans up detach a bit.  The patch is against HEAD but probably applies to 9 
and 10.  Please test with INVARIANTS enabled.

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

Note that this driver is using a deprecated API that will be removed in 11.  
If no one tests updates to this driver then it is not feasible to continue 
maintaining it in the tree.  In that case, it will be removed from HEAD one 
month from today.

-- 
John Baldwin