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Re: [PATCH 01/18] migration/vmstate: Document vmstate_dummy
From: |
Daniel P . Berrangé |
Subject: |
Re: [PATCH 01/18] migration/vmstate: Document vmstate_dummy |
Date: |
Thu, 16 Jul 2020 10:52:19 +0100 |
User-agent: |
Mutt/1.14.5 (2020-06-23) |
On Fri, Jul 03, 2020 at 10:18:54PM +0200, Philippe Mathieu-Daudé wrote:
> vmstate_dummy is special and restricted to linux-user. See commit
> c71c3e99b8 ("Add a vmstate_dummy struct for CONFIG_USER_ONLY").
>
> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
> ---
> include/migration/vmstate.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/include/migration/vmstate.h b/include/migration/vmstate.h
> index f68ed7db13..af7d80cd4e 100644
> --- a/include/migration/vmstate.h
> +++ b/include/migration/vmstate.h
> @@ -194,7 +194,7 @@ struct VMStateDescription {
> const VMStateDescription **subsections;
> };
>
> -extern const VMStateDescription vmstate_dummy;
> +extern const VMStateDescription vmstate_dummy; /* Exclusively for linux-user
> */
Originally in the commit mentioned above, this was enforced at build time:
+#ifdef CONFIG_USER_ONLY
+extern const VMStateDescription vmstate_dummy;
+#endif
but this was removed in
commit 6afc14e92ac81b29c25f097468f7751d5df1b5bc
Author: Stefan Weil <sw@weilnetz.de>
Date: Fri Feb 6 22:43:10 2015 +0100
migration: Fix warning caused by missing declaration of vmstate_dummy
Warning from the Sparse static analysis tool:
stubs/vmstate.c:4:26: warning:
symbol 'vmstate_dummy' was not declared. Should it be static?
So if this is really intended to only be used by linux-user, then I
suggest we put CONFIG_USER_ONLY back, and figure out a different
way to address the undeclared symbol problem. I guess the problem
was that stub code is shared both both user/softmmu builds. So
perhaps we need to stub this in linux-user only code, instead of
having it in the main stub library that is common.
Regards,
Daniel
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- [PATCH 00/18] hw: Mark the device with no migratable fields, Philippe Mathieu-Daudé, 2020/07/03
- [PATCH 01/18] migration/vmstate: Document vmstate_dummy, Philippe Mathieu-Daudé, 2020/07/03
- [PATCH 02/18] migration/vmstate: Introduce vmstate_no_state_to_migrate, Philippe Mathieu-Daudé, 2020/07/03
- [PATCH 03/18] hw/core/qdev: Add vmstate_qdev_no_state_to_migrate, Philippe Mathieu-Daudé, 2020/07/03
- [PATCH 04/18] hw/arm/armv7m: Mark the device with no migratable fields, Philippe Mathieu-Daudé, 2020/07/03
- [PATCH 06/18] hw/arm/bcm283x: Mark devices with no migratable fields, Philippe Mathieu-Daudé, 2020/07/03
- [PATCH 05/18] hw/arm/aspeed_soc: Mark the device with no migratable fields, Philippe Mathieu-Daudé, 2020/07/03
- [PATCH 07/18] hw/arm/msf2-soc: Mark the device with no migratable fields, Philippe Mathieu-Daudé, 2020/07/03
- [PATCH 08/18] hw/core/split-irq: Mark the device with no migratable fields, Philippe Mathieu-Daudé, 2020/07/03