[PATCH] usb: remove redundant 'default n' from Kconfig-s

[PATCH] usb: remove redundant 'default n' from Kconfig-s

[Bartlomiej Zolnierkiewicz]

'default n' is the default value for any bool or tristate Kconfig
setting so there is no need to write it explicitly.

Also since commit f467c5640c29 ("kconfig: only write '# CONFIG_FOO
is not set' for visible symbols") the Kconfig behavior is the same
regardless of 'default n' being present or not:

    ...
    One side effect of (and the main motivation for) this change is making
    the following two definitions behave exactly the same:
    
        config FOO
                bool
    
        config FOO
                bool
                default n
    
    With this change, neither of these will generate a
    '# CONFIG_FOO is not set' line (assuming FOO isn't selected/implied).
    That might make it clearer to people that a bare 'default n' is
    redundant.
    ...

Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
---
 drivers/usb/atm/Kconfig           |    1 -
 drivers/usb/core/Kconfig          |    1 -
 drivers/usb/dwc2/Kconfig          |    1 -
 drivers/usb/gadget/legacy/Kconfig |    2 --
 drivers/usb/host/Kconfig          |    5 -----
 drivers/usb/renesas_usbhs/Kconfig |    1 -
 6 files changed, 11 deletions(-)

Index: b/drivers/usb/atm/Kconfig
===================================================================
--- a/drivers/usb/atm/Kconfig
+++ b/drivers/usb/atm/Kconfig
@@ -7,7 +7,6 @@ menuconfig USB_ATM
 	tristate "USB DSL modem support"
 	depends on ATM
 	select CRC32
-	default n
 	help
 	  Say Y here if you want to connect a USB Digital Subscriber Line (DSL)
 	  modem to your computer's USB port.  You will then need to choose your
Index: b/drivers/usb/core/Kconfig
===================================================================
--- a/drivers/usb/core/Kconfig
+++ b/drivers/usb/core/Kconfig
@@ -45,7 +45,6 @@ config USB_DYNAMIC_MINORS
 config USB_OTG
 	bool "OTG support"
 	depends on PM
-	default n
 	help
 	  The most notable feature of USB OTG is support for a
 	  "Dual-Role" device, which can act as either a device
Index: b/drivers/usb/dwc2/Kconfig
===================================================================
--- a/drivers/usb/dwc2/Kconfig
+++ b/drivers/usb/dwc2/Kconfig
@@ -58,7 +58,6 @@ config USB_DWC2_PCI
 	tristate "DWC2 PCI"
 	depends on USB_PCI
 	depends on USB_GADGET || !USB_GADGET
-	default n
 	select NOP_USB_XCEIV
 	help
 	  The Designware USB2.0 PCI interface module for controllers
Index: b/drivers/usb/gadget/legacy/Kconfig
===================================================================
--- a/drivers/usb/gadget/legacy/Kconfig
+++ b/drivers/usb/gadget/legacy/Kconfig
@@ -153,7 +153,6 @@ config USB_ETH_EEM
        depends on USB_ETH
 	select USB_LIBCOMPOSITE
 	select USB_F_EEM
-       default n
        help
          CDC EEM is a newer USB standard that is somewhat simpler than CDC ECM
          and therefore can be supported by more hardware.  Technically ECM and
@@ -419,7 +418,6 @@ config USB_G_MULTI_RNDIS
 config USB_G_MULTI_CDC
 	bool "CDC Ethernet + CDC Serial + Storage configuration"
 	depends on USB_G_MULTI
-	default n
 	select USB_F_ECM
 	help
 	  This option enables a configuration with CDC Ethernet (ECM), CDC
Index: b/drivers/usb/host/Kconfig
===================================================================
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -161,7 +161,6 @@ config USB_EHCI_PCI
 config USB_EHCI_HCD_PMC_MSP
 	tristate "EHCI support for on-chip PMC MSP71xx USB controller"
 	depends on MSP_HAS_USB
-	default n
 	select USB_EHCI_BIG_ENDIAN_DESC
 	select USB_EHCI_BIG_ENDIAN_MMIO
 	---help---
@@ -308,7 +307,6 @@ config USB_CNS3XXX_EHCI
 
 config USB_EHCI_HCD_PLATFORM
 	tristate "Generic EHCI driver for a platform device"
-	default n
 	---help---
 	  Adds an EHCI host driver for a generic platform device, which
 	  provides a memory space and an irq.
@@ -318,7 +316,6 @@ config USB_EHCI_HCD_PLATFORM
 config USB_OCTEON_EHCI
 	bool "Octeon on-chip EHCI support (DEPRECATED)"
 	depends on CAVIUM_OCTEON_SOC
-	default n
 	select USB_EHCI_BIG_ENDIAN_MMIO if CPU_BIG_ENDIAN
 	select USB_EHCI_HCD_PLATFORM
 	help
@@ -526,7 +523,6 @@ config USB_OHCI_HCD_SSB
 	depends on (SSB = y || SSB = USB_OHCI_HCD)
 	select USB_HCD_SSB
 	select USB_OHCI_HCD_PLATFORM
-	default n
 	---help---
 	  This option is deprecated now and the driver was removed, use
 	  USB_HCD_SSB and USB_OHCI_HCD_PLATFORM instead.
@@ -569,7 +565,6 @@ config USB_CNS3XXX_OHCI
 
 config USB_OHCI_HCD_PLATFORM
 	tristate "Generic OHCI driver for a platform device"
-	default n
 	---help---
 	  Adds an OHCI host driver for a generic platform device, which
 	  provides a memory space and an irq.
Index: b/drivers/usb/renesas_usbhs/Kconfig
===================================================================
--- a/drivers/usb/renesas_usbhs/Kconfig
+++ b/drivers/usb/renesas_usbhs/Kconfig
@@ -8,7 +8,6 @@ config USB_RENESAS_USBHS
 	depends on USB_GADGET
 	depends on ARCH_RENESAS || SUPERH || COMPILE_TEST
 	depends on EXTCON || !EXTCON # if EXTCON=m, USBHS cannot be built-in
-	default n
 	help
 	  Renesas USBHS is a discrete USB host and peripheral controller chip
 	  that supports both full and high speed USB 2.0 data transfers.

Re: [PATCH] usb: remove redundant 'default n' from Kconfig-s

[Felipe Balbi]

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Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> writes:

> 'default n' is the default value for any bool or tristate Kconfig
> setting so there is no need to write it explicitly.
>
> Also since commit f467c5640c29 ("kconfig: only write '# CONFIG_FOO
> is not set' for visible symbols") the Kconfig behavior is the same
> regardless of 'default n' being present or not:
>
>     ...
>     One side effect of (and the main motivation for) this change is making
>     the following two definitions behave exactly the same:
>     
>         config FOO
>                 bool
>     
>         config FOO
>                 bool
>                 default n
>     
>     With this change, neither of these will generate a
>     '# CONFIG_FOO is not set' line (assuming FOO isn't selected/implied).
>     That might make it clearer to people that a bare 'default n' is
>     redundant.
>     ...
>
> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>

Fine by me. Greg if you want to take this directly (since it touches
things all over the place):

Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com>

If you prefer that I put this in my pull request to you, just let me know.

-- 
balbi

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Re: [PATCH] usb: remove redundant 'default n' from Kconfig-s

[Greg Kroah-Hartman]

On Tue, Jun 18, 2019 at 10:29:58AM +0300, Felipe Balbi wrote:
> Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> writes:
> 
> > 'default n' is the default value for any bool or tristate Kconfig
> > setting so there is no need to write it explicitly.
> >
> > Also since commit f467c5640c29 ("kconfig: only write '# CONFIG_FOO
> > is not set' for visible symbols") the Kconfig behavior is the same
> > regardless of 'default n' being present or not:
> >
> >     ...
> >     One side effect of (and the main motivation for) this change is making
> >     the following two definitions behave exactly the same:
> >     
> >         config FOO
> >                 bool
> >     
> >         config FOO
> >                 bool
> >                 default n
> >     
> >     With this change, neither of these will generate a
> >     '# CONFIG_FOO is not set' line (assuming FOO isn't selected/implied).
> >     That might make it clearer to people that a bare 'default n' is
> >     redundant.
> >     ...
> >
> > Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
> 
> Fine by me. Greg if you want to take this directly (since it touches
> things all over the place):
> 
> Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com>
> 
> If you prefer that I put this in my pull request to you, just let me know.

I think I already took this :)