linux-kernel - Re: [PATCH v2 1/2] uio: provide vm access to UIO_MEM

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20130730134950.GA27962@kroah.com>
Date:	Tue, 30 Jul 2013 06:49:50 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>
Cc:	"Hans J. Koch" <hjk@...sjkoch.de>, linux-kernel@...r.kernel.org,
	kernel@...gutronix.de, Andrew Morton <akpm@...ux-foundation.org>,
	linux-mm@...ck.org
Subject: Re: [PATCH v2 1/2] uio: provide vm access to UIO_MEM_PHYS maps

On Tue, Jul 30, 2013 at 09:52:39AM +0200, Uwe Kleine-König wrote:
> [expanding Cc: to also include akpm and linux-mm]
> 
> Hello,
> 
> On Mon, Jul 29, 2013 at 01:09:14PM -0700, Greg Kroah-Hartman wrote:
> > On Sun, Jul 28, 2013 at 12:09:37AM +0200, Uwe Kleine-König wrote:
> > > This makes it possible to let gdb access mappings of the process that is
> > > being debugged.
> > > 
> > > uio_mmap_logical was moved and uio_vm_ops renamed to group related code
> > > and differentiate to new stuff.
> > > 
> > > Signed-off-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
> > > ---
> > > Changes since v1:
> > >     - only use generic_access_phys ifdef CONFIG_HAVE_IOREMAP_PROT
> > >     - fix all users of renamed struct
> > 
> > I still get a build error with this patch:
> > 
> >   MODPOST 384 modules
> > ERROR: "generic_access_phys" [drivers/uio/uio.ko] undefined!
> > 
> > So something isn't quite right.
> Ah, you built as a module and generic_access_phys isn't exported. The
> other users of generic_access_phys (arch/x86/pci/i386.c and
> drivers/char/mem.c) can only be builtin.
> 
> So the IMHO best option is to add an EXPORT_SYMBOL(generic_access_phys)
> to mm/memory.c.

EXPORT_SYMBOL_GPL() perhaps?

And why all of a sudden does the uio driver need this change?  It is
working just fine right now without it, right?

thanks,

greg k-h
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/