Re: [PATCH 01/28] Remove CPU_MMP3

Geert Uytterhoeven
2014-02-12T07:52:34Z

Cc Yu Xu <yuxu@marvell.com>

On Tue, Feb 11, 2014 at 11:01 PM, Paul Bolle <pebolle@tiscali.nl> wrote:
> On Tue, 2014-02-11 at 13:30 -0800, Greg Kroah-Hartman wrote:
>> On Sun, Feb 09, 2014 at 07:47:39PM +0100, Richard Weinberger wrote:
>> > The symbol is an orphan, get rid of it.
>> >
>> > Signed-off-by: Richard Weinberger <richard@nod.at>
>> > Acked-by: Paul Bolle <pebolle@tiscali.nl>
>> >
>> > ---
>> > drivers/usb/phy/Kconfig | 1 -
>> > drivers/video/mmp/Kconfig | 2 +-
>> > drivers/video/mmp/hw/Kconfig | 2 +-
>> > 3 files changed, 2 insertions(+), 3 deletions(-)
>> >
>> > diff --git a/drivers/usb/phy/Kconfig b/drivers/usb/phy/Kconfig
>> > index 7d1451d..b9b1c52 100644
>> > --- a/drivers/usb/phy/Kconfig
>> > +++ b/drivers/usb/phy/Kconfig
>> > @@ -61,7 +61,6 @@ config KEYSTONE_USB_PHY
>> >
>> > config MV_U3D_PHY
>> > bool "Marvell USB 3.0 PHY controller Driver"
>> > - depends on CPU_MMP3
>> > select USB_PHY
>> > help
>> > Enable this to support Marvell USB 3.0 phy controller for Marvell
>>
>> Do this and the driver breaks the build so it needs to depend on
>> something:
>>
>> drivers/usb/phy/phy-mv-u3d-usb.c: In function ‘mv_u3d_phy_read’:
>> drivers/usb/phy/phy-mv-u3d-usb.c:42:2: error: implicit declaration of function ‘writel_relaxed’ [-Werror=implicit-function-declaration]
>
> This sort of proves that a driver that depends on an unknown Kconfig
> symbol gets no build coverage (and will bit rot).
>
>> Sorry, I can't take this as-is.
>
> My mistake, I should have spotted this when looking a Richard's patch.
>
> Some background (which I quickly dug up): config MV_U3D_PHY got added in
> v3.7 through commit a67e76ac904c ("usb: phy: mv_u3d: Add usb phy driver
> for mv_u3d"). It then depended on USB_MV_U3D. And that symbol depended
> on CPU_MMP3 at that time. Ie, MV_U3D_PHY was unbuildable when it was
> added.
>
> In commit 60630c2eabd4 ("usb: gadget: mv_u3d: drop ARCH dependency")
> MV_U3D_PHY was made depended directly on CPU_MMP3. That kept it
> unbuildable, of course.
>
> Richard, assuming you agree with the above short history of MV_U3D_PHY,
> would you mind sending a v2 that removes this unbuildable driver?

Gr{oetje,eeting}s,

Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds