Re: virtio-net: new section mismatch warning. revert patch?
From: Sam Ravnborg
Date: Wed Nov 04 2009 - 12:25:07 EST
On Wed, Nov 04, 2009 at 04:17:30PM +0200, Michael S. Tsirkin wrote:
> With v2.6.32-rcX I started getting section mismatch warnings for
> make with CONFIG_DEBUG_SECTION_MISMATCH=y shows:
> WARNING: drivers/net/virtio_net.o(.data+0x90): Section mismatch in
> reference from the variable virtio_net to the function
> The variable virtio_net references
> the function __devexit virtnet_remove()
> If the reference is valid then annotate the
> variable with __exit* (see linux/init.h) or name the variable:
> *driver, *_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console,
> virtnet_remove was converted to devexit by this commit:
> commit 3d1285beff2e8467b8c3884d83b7a91a99aa9fcd
> Author: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>
> Date: Wed Sep 30 22:28:34 2009 +0000
> move virtnet_remove to .devexit.text
> We didn't have these warnings in v2.6.31, so this is a regression.
It is correct to annotate the exit function __devexit.
So we should try to silence modpost in other ways.
1) annotate the virtio_net variable with __ref to tell
it is allowed to reference __init, __exit annotated stuff.
2) Rename virtio_net to virtio_net_driver
This is not a "my machine no longer works" issue but it would
be nice to have it sorted out one way or the other before next -rc.
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