Re: error: implicit declarations of BUG/BUG_ON/WARN_ON/WARN_ON_ONCE

[Randy Dunlap]

On 06/15/2012 09:27 AM, Randy Dunlap wrote:

> On 06/14/2012 11:52 PM, Fengguang Wu wrote:
> 
>> On Fri, Jun 15, 2012 at 02:33:03PM +1000, Stephen Rothwell wrote:
>>> Hi all,
>>>
>>> Changes since 20120614:
>>>
>>> My fixes tree contains:
>>> 	fix bug.h's inclusion of kernel.h
>>
>> I got these errors with the attached randconfig. Not sure which change
>> triggers them.
> 
> Ditto.  When CONFIG_BUG is not enabled.


This problem is still in linux-next of 20120618...


> 
>>   CC      arch/x86/kernel/asm-offsets.s
>> In file included from /c/kernel-tests/mm/arch/x86/include/asm/atomic.h:6:0,
>>                  from /c/kernel-tests/mm/include/linux/atomic.h:4,
>>                  from /c/kernel-tests/mm/include/linux/crypto.h:20,
>>                  from /c/kernel-tests/mm/arch/x86/kernel/asm-offsets.c:8:
>> /c/kernel-tests/mm/arch/x86/include/asm/processor.h: In function ‘get_aperfmperf’:
>> /c/kernel-tests/mm/arch/x86/include/asm/processor.h:937:2: error: implicit declaration of function ‘WARN_ON_ONCE’ [-Werror=implicit-function-declaration]
>> In file included from /c/kernel-tests/mm/include/linux/thread_info.h:54:0,
>>                  from /c/kernel-tests/mm/include/linux/preempt.h:9,
>>                  from /c/kernel-tests/mm/include/linux/spinlock.h:50,
>>                  from /c/kernel-tests/mm/include/linux/mmzone.h:7,
>>                  from /c/kernel-tests/mm/include/linux/gfp.h:4,
>>                  from /c/kernel-tests/mm/include/linux/slab.h:12,
>>                  from /c/kernel-tests/mm/include/linux/crypto.h:24,
>>                  from /c/kernel-tests/mm/arch/x86/kernel/asm-offsets.c:8:
>> /c/kernel-tests/mm/arch/x86/include/asm/thread_info.h: In function ‘set_restore_sigmask’:
>> /c/kernel-tests/mm/arch/x86/include/asm/thread_info.h:250:2: error: implicit declaration of function ‘WARN_ON’ [-Werror=implicit-function-declaration]
>> In file included from /c/kernel-tests/mm/include/linux/mmzone.h:717:0,
>>                  from /c/kernel-tests/mm/include/linux/gfp.h:4,
>>                  from /c/kernel-tests/mm/include/linux/slab.h:12,
>>                  from /c/kernel-tests/mm/include/linux/crypto.h:24,
>>                  from /c/kernel-tests/mm/arch/x86/kernel/asm-offsets.c:8:
>> /c/kernel-tests/mm/include/linux/memory_hotplug.h: In function ‘generic_alloc_nodedata’:
>> /c/kernel-tests/mm/include/linux/memory_hotplug.h:152:2: error: implicit declaration of function ‘BUG’ [-Werror=implicit-function-declaration]                                               
>> In file included from /c/kernel-tests/mm/arch/x86/include/asm/apic.h:12:0,                                                                
>>                  from /c/kernel-tests/mm/arch/x86/include/asm/smp.h:13,
>>                  from /c/kernel-tests/mm/include/linux/smp.h:38,
>>                  from /c/kernel-tests/mm/include/linux/topology.h:33,
>>                  from /c/kernel-tests/mm/include/linux/gfp.h:7,
>>                  from /c/kernel-tests/mm/include/linux/slab.h:12,
>>                  from /c/kernel-tests/mm/include/linux/crypto.h:24,
>>                  from /c/kernel-tests/mm/arch/x86/kernel/asm-offsets.c:8:
>> /c/kernel-tests/mm/arch/x86/include/asm/fixmap.h: In function ‘virt_to_fix’:
>> /c/kernel-tests/mm/arch/x86/include/asm/fixmap.h:220:2: error: implicit declaration of function ‘BUG_ON’ [-Werror=implicit-function-declaration]
>>   HOSTLD  scripts/genksyms/genksyms
>> cc1: some warnings being treated as errors
>> make[2]: *** [arch/x86/kernel/asm-offsets.s] Error 1
>> make[1]: *** [prepare0] Error 2
>> make[1]: *** Waiting for unfinished jobs....
>>
>> Thanks,
>> Fengguang
> 
> 
> 



-- 
~Randy
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