From: "Hans J. Koch" <hjk@hansjkoch.de>
To: Greg KH <gregkh@linuxfoundation.org>
Cc: Benedikt Spranger <b.spranger@linutronix.de>,
"Hans J. Koch" <hjk@hansjkoch.de>,
linux-kernel@vger.kernel.org, Alexander.Frank@eberspaecher.com
Subject: Re: [PATCH 2/2] uio: do not expose inode to uio open/release hooks
Date: Thu, 13 Dec 2012 01:08:54 +0100 [thread overview]
Message-ID: <20121213000853.GD4261@local> (raw)
In-Reply-To: <20121212150818.GB8449@kroah.com>
On Wed, Dec 12, 2012 at 07:08:18AM -0800, Greg KH wrote:
> On Wed, Dec 12, 2012 at 09:56:16AM +0100, Benedikt Spranger wrote:
> > Am Wed, 12 Dec 2012 09:50:54 +0100
> > schrieb "Hans J. Koch" <hjk@hansjkoch.de>:
> >
> > > On Tue, Dec 11, 2012 at 08:46:48PM -0800, Greg KH wrote:
> > > > Yes, but what does that have to do with this in-kernel, internal api?
> > >
> > > Ah, OK. You're right, the commit message is confusing.
> > >
> > > Bene, it's enough to say we drop the inode parameter because nobody
> > > ever needed it.
> > I am fine with that.
> >
> > > I cannot see why this also helps with the other problem.
> > It would help, because we can defer calling the release hook until the
> > last mmap user is gone. In this case the inode pointer may not be valid
> > anymore.
>
> Which, again, is the same for any in-kernel driver with these types of
> callbacks.
Is that a general mmap problem that wants to be fixed?
hjk
>
> greg k-h
>
next prev parent reply other threads:[~2012-12-13 0:09 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-11 23:12 [PATCH 0/2] uio: open(), mmap(), close() Benedikt Spranger
2012-12-11 23:12 ` [PATCH 1/2] uio: add warning to documentation Benedikt Spranger
2012-12-11 23:18 ` Greg KH
2012-12-12 0:45 ` Benedikt Spranger
2012-12-12 4:49 ` Greg KH
2012-12-12 1:56 ` Hans J. Koch
2012-12-12 4:47 ` Greg KH
2012-12-11 23:12 ` [PATCH 2/2] uio: do not expose inode to uio open/release hooks Benedikt Spranger
2012-12-11 23:20 ` Greg KH
2012-12-12 1:42 ` Hans J. Koch
2012-12-12 4:46 ` Greg KH
2012-12-12 8:50 ` Hans J. Koch
2012-12-12 8:56 ` Benedikt Spranger
2012-12-12 15:08 ` Greg KH
2012-12-13 0:08 ` Hans J. Koch [this message]
2012-12-13 0:15 ` Greg KH
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