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

[Randy Dunlap]

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.


>   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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