Re: undefined reference to `efi_call'

[H. Peter Anvin]

On 02/10/16 11:52, Andrew Morton wrote:
> On Wed, 10 Feb 2016 16:48:28 +0800 kbuild test robot <fengguang.wu@xxxxxxxxx> wrote:
> 
>> Hi Johannes,
>>
>> It's probably a bug fix that unveils the link errors.
>>
>> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
>> head:   2178cbc68f3602dc0b5949b9be2c8383ad3d93ef
>> commit: 489c2a20a414351fe0813a727c34600c0f7292ae mm: memcontrol: introduce CONFIG_MEMCG_LEGACY_KMEM
>> date:   3 weeks ago
>> config: x86_64-randconfig-s3-02101458 (attached as .config)
>> reproduce:
>>         git checkout 489c2a20a414351fe0813a727c34600c0f7292ae
>>         # save the attached .config to linux build tree
>>         make ARCH=x86_64 
>>
>> All errors (new ones prefixed by >>):
>>
>>    arch/x86/built-in.o: In function `uv_bios_call':
>>>> (.text+0xeba00): undefined reference to `efi_call'
> 
> I'd be surprised if the above patch caused this.
> 
> CONFIG_EFI=n
> 
> CONFIG_X86_UV does not depend on EFI.
> 
X86_UV ought to depend on EFI.

	-hpa