On Wed, 6 Mar 2019, Kees Cook wrote:
> On Wed, Mar 6, 2019 at 3:43 AM kbuild test robot <[email protected]> wrote:
> >
> > tree: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/asm
> > head: a0bf7fc24303a538396aa8d32450d05c1929b9f0
> > commit: d309ba034fac1a149d00cac79318973e9ba81848 [2/4] x86/asm: Pin
> > sensitive CR0 bits
> > config: um-x86_64_defconfig (attached as .config)
> > compiler: gcc-8 (Debian 8.3.0-2) 8.3.0
> > reproduce:
> > git checkout d309ba034fac1a149d00cac79318973e9ba81848
> > # save the attached .config to linux build tree
> > make ARCH=um SUBARCH=x86_64
>
> Gah, I did not build-test um. :(
>
> >
> > All errors (new ones prefixed by >>):
> >
> > In file included from arch/x86/include/asm/cacheflush.h:7,
> > from include/linux/highmem.h:12,
> > from net//core/sock.c:117:
> > arch/x86/include/asm/special_insns.h: In function 'native_write_cr0':
> > >> arch/x86/include/asm/special_insns.h:31:9: error: 'X86_CR0_WP'
> > >> undeclared (first use in this function)
> > val |= X86_CR0_WP;
> > ^~~~~~~~~~
>
> Should I just add something like:
>
> #ifdef __arch_um__
> # define X86_CR0_WP 0
> #endif
Fixed it up by including the proper header file.
Thanks,
tglx
