linux-kernel - Re: Warning message from 'make nsdeps' when namespace is lower cases

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Message-ID: <alpine.DEB.2.21.1910291544180.2144@hadrien>
Date:   Tue, 29 Oct 2019 15:45:07 +0100 (CET)
From:   Julia Lawall <julia.lawall@...6.fr>
To:     Matthias Maennich <maennich@...gle.com>
cc:     Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Jessica Yu <jeyu@...nel.org>,
        Coccinelle <cocci@...teme.lip6.fr>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Warning message from 'make nsdeps' when namespace is lower
 cases



On Tue, 29 Oct 2019, Matthias Maennich wrote:

> Hi!
>
> On Tue, Oct 29, 2019 at 02:38:36PM +0100, Julia Lawall wrote:
> >
> >
> > On Tue, 29 Oct 2019, Masahiro Yamada wrote:
> >
> > > Hi.
> > >
> > > When I was playing with 'make nsdeps',
> > > I saw a new warning.
> > >
> > > If I rename USB_STORAGE to usb_storage,
> > > I see 'warning: line 15: should usb_storage be a metavariable?'
> > > Why? I think it comes from spatch.
> >
> > Yes, it would come from spatch.
> >
> > > It should be technically OK to use either upper or lower cases
> > > for the namespace name.
> >
> > What is normally wanted?  Uppercase or lowercase?
>
> There is no (documented) preference or convention yet. The existing
> namespaces (USB_STORAGE and MCB) use upper case. While technically both
> should work, I have a personal preference for consistently using upper
> case. Is there a way to suppress this warning as I agree that it might
> be confusing?

The warning is not intentional in this case.  I will have to fix
Coccinelle, but I can't do it until next week.

julia

>
> Cheers,
> Matthias
>
> >
> > julia
> >
> > >
> > > Just apply the following, and try 'make nsdeps'.
> > >
> > >
> > > diff --git a/drivers/usb/storage/Makefile b/drivers/usb/storage/Makefile
> > > index 46635fa4a340..6f817d65c26b 100644
> > > --- a/drivers/usb/storage/Makefile
> > > +++ b/drivers/usb/storage/Makefile
> > > @@ -8,7 +8,7 @@
> > >
> > >  ccflags-y := -I $(srctree)/drivers/scsi
> > >
> > > -ccflags-y += -DDEFAULT_SYMBOL_NAMESPACE=USB_STORAGE
> > > +ccflags-y += -DDEFAULT_SYMBOL_NAMESPACE=usb_storage
> > >
> > >  obj-$(CONFIG_USB_UAS)          += uas.o
> > >  obj-$(CONFIG_USB_STORAGE)      += usb-storage.o
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > --
> > > Best Regards
> > > Masahiro Yamada
> > >
>