Date: Thu, 29 Aug 2002 12:19:27 +0200 (CEST) From: Harti Brandt <brandt@fokus.gmd.de> To: hackers@freebsd.org Subject: driver attach/detach functions Message-ID: <20020829121303.F381-100000@beagle.fokus.gmd.de>
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Hi,
while trying to get rid of 'could sleep with mutex' messages a question
occured to me: is there any global mechanism that ensures that no two
threads enter the interface attach/detach functions at the same time?
If there is, there should be a hint in driver(9) probably. If there isn't
what is the canonical way to implement an MP-safe attach function? Some
drivers use
foo_attach(...)
{
mtx_init(&sc->mtx, ...
mtx_lock(&sc->mtx);
...
but this really doesn't help.
Regards,
harti
--
harti brandt, http://www.fokus.gmd.de/research/cc/cats/employees/hartmut.brandt/private
brandt@fokus.gmd.de, brandt@fokus.fhg.de
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