Re: [bp:tip-mm 11/13] drivers/video/fbdev/aty/atyfb_base.c:3461:2: error: implicit declaration of function 'ioremap_uc'

[Borislav Petkov]

On Fri, Jun 26, 2015 at 04:28:51PM +0800, kbuild test robot wrote:
> tree:   git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp tip-mm
> head:   7b0982330a1b4d4bdb99bb8382e2363165231a90
> commit: fd50bea9cedd8fdbd091dfccb4b526be0ef9839f [11/13] drivers/video/fbdev/atyfb: Replace MTRR UC hole with strong UC
> config: xtensa-allyesconfig (attached as .config)
> reproduce:
>   wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
>   chmod +x ~/bin/make.cross
>   git checkout fd50bea9cedd8fdbd091dfccb4b526be0ef9839f
>   # save the attached .config to linux build tree
>   make.cross ARCH=xtensa 

Cool script, btw. I'll use that locally too :-)

> All error/warnings (new ones prefixed by >>):
> 
>    drivers/video/fbdev/aty/atyfb_base.c: In function 'atyfb_setup_generic':
> >> drivers/video/fbdev/aty/atyfb_base.c:3461:2: error: implicit declaration of function 'ioremap_uc' [-Werror=implicit-function-declaration]
>      par->ati_regbase = ioremap_uc(info->fix.mmio_start, 0x1000);
>      ^
> >> drivers/video/fbdev/aty/atyfb_base.c:3461:19: warning: assignment makes pointer from integer without a cast
>      par->ati_regbase = ioremap_uc(info->fix.mmio_start, 0x1000);
>                       ^
>    cc1: some warnings being treated as errors
> 
> vim +/ioremap_uc +3461 drivers/video/fbdev/aty/atyfb_base.c
> 
>   3455	
>   3456		info->fix.mmio_start = raddr;
>   3457		/*
>   3458		 * By using strong UC we force the MTRR to never have an
>   3459		 * effect on the MMIO region on both non-PAT and PAT systems.
>   3460		 */
> > 3461		par->ati_regbase = ioremap_uc(info->fix.mmio_start, 0x1000);
>   3462		if (par->ati_regbase == NULL)
>   3463			return -ENOMEM;
>   3464	

Looks to me, xtensa needs something like that:

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