Linux Virtualization - Jan 2018 - [PATCH] virtio: make VIRTIO a menuconfig to ease disabling it all

No need to get into the submenu to disable all VIRTIO-related
config entries.

This makes it easier to disable all VIRTIO config options
without entering the submenu. It will also enable one
to see that en/dis-abled state from the outside menu.

This is only intended to change menuconfig UI, not change
the config dependencies.

v2: add "default y" to avoid breaking existing configs

Signed-off-by: Vincent Legoll <vincent.legoll at gmail.com>
---
 drivers/virtio/Kconfig | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/virtio/Kconfig b/drivers/virtio/Kconfig
index cff773f15b7e..290a1875e1d3 100644
--- a/drivers/virtio/Kconfig
+++ b/drivers/virtio/Kconfig
@@ -5,7 +5,11 @@ config VIRTIO
 	  bus, such as CONFIG_VIRTIO_PCI, CONFIG_VIRTIO_MMIO, CONFIG_RPMSG
 	  or CONFIG_S390_GUEST.
 
-menu "Virtio drivers"
+menuconfig VIRTIO_MENU
+	  bool "Virtio drivers"
+	  default y
+
+if VIRTIO_MENU
 
 config VIRTIO_PCI
 	tristate "PCI driver for virtio devices"
@@ -79,4 +83,4 @@ config VIRTIO_MMIO_CMDLINE_DEVICES
 
 	 If unsure, say 'N'.
 
-endmenu
+endif # VIRTIO_MENU
-- 
2.11.0

On 01/03/18 01:49, Vincent Legoll wrote:
> No need to get into the submenu to disable all VIRTIO-related
> config entries.
> 
> This makes it easier to disable all VIRTIO config options
> without entering the submenu. It will also enable one
> to see that en/dis-abled state from the outside menu.
> 
> This is only intended to change menuconfig UI, not change
> the config dependencies.
> 
> v2: add "default y" to avoid breaking existing configs
> 
> Signed-off-by: Vincent Legoll <vincent.legoll at gmail.com>
For a single patch (not 2 or more in a series), please just use one
email with the patch description etc. in it.  No need for a cover letter.
> ---
>  drivers/virtio/Kconfig | 8 ++++++--
>  1 file changed, 6 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/virtio/Kconfig b/drivers/virtio/Kconfig
> index cff773f15b7e..290a1875e1d3 100644
> --- a/drivers/virtio/Kconfig
> +++ b/drivers/virtio/Kconfig
> @@ -5,7 +5,11 @@ config VIRTIO
>  	  bus, such as CONFIG_VIRTIO_PCI, CONFIG_VIRTIO_MMIO, CONFIG_RPMSG
>  	  or CONFIG_S390_GUEST.
>  
> -menu "Virtio drivers"
> +menuconfig VIRTIO_MENU
> +	  bool "Virtio drivers"
> +	  default y
The 2 lines above should be indented only with 1 tab.  They should not line up
with the help text above (help text is indented more than other Kconfig lines).

After that little style thing is fixed, you can add:

Reviewed-by: Randy Dunlap <rdunlap at infradead.org>
Tested-by: Randy Dunlap <rdunlap at infradead.org> # works for me

and even though this will disable the drivers that are listed immediately
inside this if/endif block, there are several other drivers that select VIRTIO,
so it can be slightly tricky to figure out what is causing CONFIG_VIRTIO
to be enabled after having disabled CONFIG_VIRTIO_MENU.

Thanks.
> +
> +if VIRTIO_MENU
>  
>  config VIRTIO_PCI
>  	tristate "PCI driver for virtio devices"
> @@ -79,4 +83,4 @@ config VIRTIO_MMIO_CMDLINE_DEVICES
>  
>  	 If unsure, say 'N'.
>  
> -endmenu
> +endif # VIRTIO_MENU
> 

-- 
~Randy

No need to get into the submenu to disable all VIRTIO-related
config entries.

This makes it easier to disable all VIRTIO config options
without entering the submenu. It will also enable one
to see that en/dis-abled state from the outside menu.

This is only intended to change menuconfig UI, not change
the config dependencies.

v2: Added "default y" to avoid breaking existing configs
v3: Fixed wrong indentation, added *-by from Randy

Signed-off-by: Vincent Legoll <vincent.legoll at gmail.com>
Reviewed-by: Randy Dunlap <rdunlap at infradead.org>
Tested-by: Randy Dunlap <rdunlap at infradead.org> # works for me
---
 drivers/virtio/Kconfig | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/virtio/Kconfig b/drivers/virtio/Kconfig
index cff773f15b7e..35897649c24f 100644
--- a/drivers/virtio/Kconfig
+++ b/drivers/virtio/Kconfig
@@ -5,7 +5,11 @@ config VIRTIO
 	  bus, such as CONFIG_VIRTIO_PCI, CONFIG_VIRTIO_MMIO, CONFIG_RPMSG
 	  or CONFIG_S390_GUEST.
 
-menu "Virtio drivers"
+menuconfig VIRTIO_MENU
+	bool "Virtio drivers"
+	default y
+
+if VIRTIO_MENU
 
 config VIRTIO_PCI
 	tristate "PCI driver for virtio devices"
@@ -79,4 +83,4 @@ config VIRTIO_MMIO_CMDLINE_DEVICES
 
 	 If unsure, say 'N'.
 
-endmenu
+endif # VIRTIO_MENU
-- 
2.14.1