From: Martyn Welch <martyn.welch@ge.com>
To: "Emilio G. Cota" <cota@braap.org>
Cc: Manohar Vanga <manohar.vanga@cern.ch>,
gregkh@suse.de, devel@driverdev.osuosl.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 3/5] staging: vme: add functions for bridge module refcounting
Date: Mon, 22 Aug 2011 13:24:59 +0100 [thread overview]
Message-ID: <4E524A9B.7090700@ge.com> (raw)
In-Reply-To: <20110813074714.GA32149@flamenco.cs.columbia.edu>
On 13/08/11 08:47, Emilio G. Cota wrote:
> On Fri, Aug 12, 2011 at 12:30:49 +0200, Manohar Vanga wrote:
>> + struct vme_bridge *bridge;
>> +
>> + mutex_lock(&vme_buses_lock);
>> + list_for_each_entry(bridge, &vme_bus_list, bus_list) {
>> + if (bridge->num == bus_id) {
>> + if (!bridge->owner)
>> + dev_warn(bridge->parent,
>> + "bridge->owner not set\n");
>
> Don't do this; it will throw a false warning if the kernel is
> built without module support. Note that in that case
>
> THIS_MODULE == (struct module *)0.
>
> try_module_get() and module_put() do the right thing for all
> possible configs. Trust them.
>
I can confirm that this does break when the bridge is compiled into the kernel.
Martyn
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next prev parent reply other threads:[~2011-08-22 12:25 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-12 10:30 [PATCH 0/5] [RESEND v2] VME Framework Fixes Manohar Vanga
2011-08-12 10:30 ` [PATCH 1/5] staging: vme: make [alloc|free]_consistent bridge specific Manohar Vanga
2011-08-16 8:15 ` Martyn Welch
2011-08-12 10:30 ` [PATCH 2/5] staging: vme: keep track of registered buses Manohar Vanga
2011-08-16 8:16 ` Martyn Welch
2011-08-12 10:30 ` [PATCH 3/5] staging: vme: add functions for bridge module refcounting Manohar Vanga
2011-08-13 7:47 ` Emilio G. Cota
2011-08-15 10:05 ` Manohar Vanga
2011-08-15 18:49 ` Emilio G. Cota
2011-08-22 12:24 ` Martyn Welch [this message]
2011-08-23 9:09 ` Manohar Vanga
2011-08-13 8:54 ` Emilio G. Cota
2011-08-19 8:32 ` Martyn Welch
2011-08-19 8:42 ` Martyn Welch
2011-08-12 10:30 ` [PATCH 4/5] staging: vme: add struct vme_dev for VME devices Manohar Vanga
2011-08-12 10:30 ` [PATCH 5/5] staging: vme: make match() driver specific to improve non-VME64x support Manohar Vanga
2011-08-13 8:50 ` Emilio G. Cota
2011-08-23 22:14 ` [PATCH 0/5] [RESEND v2] VME Framework Fixes Greg KH
2011-08-24 7:40 ` Martyn Welch
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