[paulmck-rcu:rcu/next 42/52] vmlinux.o: warning: objtool: __context_tracking_enter()+0x75: call to rcu_user_enter() leaves .noinstr.text section

kernel test robot
2021-12-07T17:48:08Z

CC: linux-kernel@vger.kernel.org
TO: Marco Elver <elver@google.com>
CC: "Paul E. McKenney" <paulmck@kernel.org>

tree: https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git rcu/next
head: 6a3aa1f6d19ed22b517cbb0acc0f88cda4ad42ad
commit: fe90808c12f91a180afde9eb71ce44dfcd99bbc3 [42/52] kcsan: Support WEAK_MEMORY with Clang where no objtool support exists
config: x86_64-randconfig-a003-20210928 (https://download.01.org/0day-ci/archive/20211208/202112080042.l1yRbman-lkp@intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 097a1cb1d5ebb3a0ec4bcaed8ba3ff6a8e33c00a)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git/commit/?id=fe90808c12f91a180afde9eb71ce44dfcd99bbc3
git remote add paulmck-rcu https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git
git fetch --no-tags paulmck-rcu rcu/next
git checkout fe90808c12f91a180afde9eb71ce44dfcd99bbc3
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross 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: do_syscall_64()+0x4c: call to memset() leaves .noinstr.text section
vmlinux.o: warning: objtool: do_int80_syscall_32()+0x6b: call to memset() leaves .noinstr.text section
vmlinux.o: warning: objtool: __do_fast_syscall_32()+0x6f: call to memset() leaves .noinstr.text section
vmlinux.o: warning: objtool: fixup_bad_iret()+0x1e: call to memset() leaves .noinstr.text section
vmlinux.o: warning: objtool: in_task_stack()+0x13: call to task_stack_page() leaves .noinstr.text section
vmlinux.o: warning: objtool: in_entry_stack()+0x10: call to cpu_entry_stack() leaves .noinstr.text section
vmlinux.o: warning: objtool: exc_nmi()+0x8: call to sev_es_nmi_complete() leaves .noinstr.text section
vmlinux.o: warning: objtool: enter_from_user_mode()+0x55: call to __kcsan_check_access() leaves .noinstr.text section
vmlinux.o: warning: objtool: syscall_enter_from_user_mode()+0x5c: call to __kcsan_check_access() leaves .noinstr.text section
vmlinux.o: warning: objtool: syscall_enter_from_user_mode_prepare()+0x55: call to __kcsan_check_access() leaves .noinstr.text section
vmlinux.o: warning: objtool: irqentry_enter_from_user_mode()+0x55: call to __kcsan_check_access() leaves .noinstr.text section
>> vmlinux.o: warning: objtool: __context_tracking_enter()+0x75: call to rcu_user_enter() leaves .noinstr.text section
>> vmlinux.o: warning: objtool: __context_tracking_exit()+0x3c: call to rcu_user_exit() leaves .noinstr.text section

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0-DAY CI Kernel Test Service, Intel Corporation