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