linux-kernel - [peterz-queue:objtool/core 27/28] vmlinux.o: warning: objtool: enter_from_user_mode+0x4e: call to on_thread

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Message-ID: <202205070939.aHPp3lal-lkp@intel.com>
Date:   Sat, 7 May 2022 10:07:00 +0800
From:   kernel test robot <lkp@...el.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: [peterz-queue:objtool/core 27/28] vmlinux.o: warning: objtool:
 enter_from_user_mode+0x4e: call to on_thread_stack() leaves .noinstr.text
 section

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git objtool/core
head:   0c477702d82da35bdf3b944cb844829fdfac2a53
commit: 0c1ce224210235e8a51495014a2a6c9a020d24f0 [27/28] x86/cpu: Elide KCSAN for cpu_has() and friends
config: x86_64-randconfig-a013 (https://download.01.org/0day-ci/archive/20220507/202205070939.aHPp3lal-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.2.0-20) 11.2.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git/commit/?id=0c1ce224210235e8a51495014a2a6c9a020d24f0
        git remote add peterz-queue https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git
        git fetch --no-tags peterz-queue objtool/core
        git checkout 0c1ce224210235e8a51495014a2a6c9a020d24f0
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        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: enter_from_user_mode+0x4e: 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+0x4e: call to on_thread_stack() leaves .noinstr.text section
>> vmlinux.o: warning: objtool: irqentry_enter_from_user_mode+0x4e: call to on_thread_stack() leaves .noinstr.text section

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp