linux-kernel - [tip:locking/core 4/5] vmlinux.o: warning: objtool: do_machine_check()+0x419: call to mca_msr

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Date:   Mon, 14 Mar 2022 19:40:08 +0800
From:   kernel test robot <lkp@...el.com>
To:     Borislav Petkov <bp@...e.de>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        x86@...nel.org, Peter Zijlstra <peterz@...radead.org>
Subject: [tip:locking/core 4/5] vmlinux.o: warning: objtool:
 do_machine_check()+0x419: call to mca_msr_reg() leaves .noinstr.text section

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@...el.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

---
0-DAY CI Kernel Test Service
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org