Re: [Y2038] [PATCH v2] Staging: fbtbt: Replace timespec with ktime_t

[Arnd Bergmann <arnd@arndb.de>]

On Saturday 03 October 2015 21:15:46 Ksenija Stanojević wrote:
> On Thu, Oct 1, 2015 at 10:05 PM, Arnd Bergmann <arnd@arndb.de> wrote:
> > On Thursday 01 October 2015 19:44:46 Ksenija Stanojević wrote:
> >>
> >> In my local repository I modified my .config file so that CONFIG_64BIT
> >> is not set,
> >> and after that I recompiled all directory, but I don't get any errors/warning at
> >> compile-time.
> >> Also I separetly compiled this specific file but still no warnings
> >> My .config  looks something like this:
> >>
> >> . . .
> >>
> >> Should I change my working kernel or .config file is just enough?
> >
> > I think the problem is that you only compiled that directory but did
> > not attempt to do a full rebuild of the kernel and modules, which is
> > required to catch link-time errors.
> >
> > The compiler does not know at this point that the 64-bit division function
> > is undefined in the kernel, you only get a warning at the 'make vmlinux'
> > link stage (for built-in drivers) or the 'make modules' modpost stage
> > afterwards.
> 
> I rebuilded my repository with:
> make vmlinux
> make modules
> but I still don't get any warnings.
> Do you have any other suggestion on what I'm doing wrong?

I just tried it on my machine and I get (for an ARM build)

$ make -skj30   
ERROR: "__aeabi_ldivmod" [drivers/staging/fbtft/fbtft.ko] undefined!

Two possible explanations why you don't get it:

- your .config file got changed back to CONFIG_64BIT being enabled
- you don't have CONFIG_FB_TFT enabled in this build.

	Arnd