Subject: [PATCH v2] xen kconfig: don't "select INPUT_XEN_KBDDEV_FRONTEND"

From: [email-masked] (Tomi Valkeinen)
Date: Fri, 11 Mar 2016 13:37:52 +0200

On 16/02/16 17:03, Arnd Bergmann wrote:
> The Xen framebuffer driver selects the xen keyboard driver, so the latter
> will be built-in if XEN_FBDEV_FRONTEND=y. However, when CONFIG_INPUT
> is a loadable module, this configuration cannot work. On mainline kernels,
> the symbol will be enabled but not used, while in combination with
> a patch I have to detect such useless configurations, we get the
> expected link failure:
> 
> drivers/input/built-in.o: In function `xenkbd_remove':
> xen-kbdfront.c:(.text+0x2f0): undefined reference to `input_unregister_device'
> xen-kbdfront.c:(.text+0x30e): undefined reference to `input_unregister_device'
> 
> This removes the extra "select", as it just causes more trouble than
> it helps. In theory, some defconfig file might break if it has
> XEN_FBDEV_FRONTEND in it but not INPUT_XEN_KBDDEV_FRONTEND. The Kconfig
> fragment we ship in the kernel (kernel/configs/xen.config) however
> already enables both, and anyone using an old .config file would
> keep having both enabled.
> 
> Signed-off-by: Arnd Bergmann <[email-masked]>
> Suggested-by: David Vrabel <[email-masked]>
> Fixes: 36c1132e34bd ("xen kconfig: fix select INPUT_XEN_KBDDEV_FRONTEND")
> 
> diff --git a/drivers/video/fbdev/Kconfig b/drivers/video/fbdev/Kconfig
> index 8ea45a5cd806..d889ef2048df 100644
> --- a/drivers/video/fbdev/Kconfig
> +++ b/drivers/video/fbdev/Kconfig
> @@ -2246,7 +2246,6 @@ config XEN_FBDEV_FRONTEND
>  	select FB_SYS_IMAGEBLIT
>  	select FB_SYS_FOPS
>  	select FB_DEFERRED_IO
> -	select INPUT_XEN_KBDDEV_FRONTEND if INPUT_MISC
>  	select XEN_XENBUS_FRONTEND
>  	default y
>  	help
> 

Thanks, queued for 4.6.

 Tomi

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 819 bytes
Desc: OpenPGP digital signature
URL: <http://lists.infradead.org/pipermail/linux-arm-kernel/attachments/20160311/37fd2772/attachment.sig>