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SubjectRe: [kbuild-all] Re: [tip:locking/core 4/5] vmlinux.o: warning: objtool: do_machine_check()+0x419: call to mca_msr_reg() leaves .noinstr.text section
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On 3/14/2022 8:01 PM, Borislav Petkov wrote:
> On Mon, Mar 14, 2022 at 07:40:08PM +0800, kernel test robot wrote:
>> tree: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git locking/core
>> head: cd27ccfc727e99352321c0c75012ab9c5a90321e
>> commit: acb13ea0baf8db8d05a3910c06e997c90825faad [4/5] asm-generic/bitops: Always inline all bit manipulation helpers
>> config: x86_64-randconfig-a005-20220314 (https://download.01.org/0day-ci/archive/20220314/202203141947.9KhIyyR7-lkp@intel.com/config)
>> compiler: gcc-9 (Ubuntu 9.4.0-1ubuntu1~20.04) 9.4.0
>> reproduce (this is a W=1 build):
>> # https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=acb13ea0baf8db8d05a3910c06e997c90825faad
>> git remote add tip https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git
>> git fetch --no-tags tip locking/core
>> git checkout acb13ea0baf8db8d05a3910c06e997c90825faad
>> # save the config file to linux build tree
>> mkdir build_dir
>> make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash
>>
>> If you fix the issue, kindly add following tag as appropriate
>> Reported-by: kernel test robot <lkp@intel.com>
>>
>> All warnings (new ones prefixed by >>):
>>
>> vmlinux.o: warning: objtool: mce_read_aux()+0x42: call to mca_msr_reg() leaves .noinstr.text section
>>>> vmlinux.o: warning: objtool: do_machine_check()+0x419: call to mca_msr_reg() leaves .noinstr.text section
>> vmlinux.o: warning: objtool: enter_from_user_mode()+0x4a: call to on_thread_stack() leaves .noinstr.text section
>> vmlinux.o: warning: objtool: syscall_enter_from_user_mode()+0x53: call to on_thread_stack() leaves .noinstr.text section
>> vmlinux.o: warning: objtool: syscall_enter_from_user_mode_prepare()+0x4a: call to on_thread_stack() leaves .noinstr.text section
>> vmlinux.o: warning: objtool: irqentry_enter_from_user_mode()+0x4a: call to on_thread_stack() leaves .noinstr.text section
>
> You need to test tip/ras/core with that .config - not some random
> patches inside of locking/core. Fixing the noinstr issues is split into
> a couple of patches in locking/core and ras/core.
>
> Thx.
>

Hi Borislav,

Thanks for the explanation, should we skip testing the locking/core
branch next time?

Best Regards,
Rong Chen

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