Date: Mon, 08 Jul 2002 00:24:16 -0600 (MDT) From: "M. Warner Losh" <imp@village.org> To: nate@root.org Cc: current@FreeBSD.ORG Subject: Re: dev_t semantics Message-ID: <20020708.002416.130619382.imp@village.org> In-Reply-To: <Pine.BSF.4.21.0207072008110.36901-100000@root.org> References: <Pine.BSF.4.21.0207072008110.36901-100000@root.org>
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In message: <Pine.BSF.4.21.0207072008110.36901-100000@root.org>
Nate Lawson <nate@root.org> writes:
: I am using dev->si_drv1 to store my softc (as are other drivers). What
: guarantees do I have about multiple opens/closes not stepping on each
: other's toes? How does -stable compare to -current in this regard?
You don't have any guarantees. si_drv1 is for each dev_t. Multiple
opens of the same minor device share the same dev_t. Stable and
current are exactly the same in this reguard.
You cannot easily have the semantics that you want :-(
Warner
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