tree: https://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git x86/fpu head: 70e967061547de5e520d4d81dd7f727894b06f6e commit: 83745cf1a7e45c2930061f6a9b3d874152999b32 [48/53] x86/fpu: Hook up PKRU into ptrace() config: x86_64-randconfig-a001-20210614 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 64720f57bea6a6bf033feef4a5751ab9c0c3b401) 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 # install x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git/commit/?id... git remote add tglx-devel https://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git git fetch --no-tags tglx-devel x86/fpu git checkout 83745cf1a7e45c2930061f6a9b3d874152999b32 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): copy_uabi_xstate_to_membuf(to, &fpu->state.xsave, XSTATE_COPY_FX); ^~~~~~~~~~~~~~~~~ arch/x86/include/asm/fpu/xstate.h:142:71: note: passing argument to parameter 'tsk' here void copy_uabi_xstate_to_membuf(struct membuf to, struct task_struct *tsk, ^ 1 error generated. -- pkru.pkru = target->thread.pkru; ^ 1 error generated. vim +46 arch/x86/kernel/fpu/regset.c 0c306bcfba2882 Ingo Molnar 2015-04-30 30 0c306bcfba2882 Ingo Molnar 2015-04-30 31 int xfpregs_get(struct task_struct *target, const struct user_regset *regset, 0557d64d983e3d Al Viro 2020-02-18 32 struct membuf to) 0c306bcfba2882 Ingo Molnar 2015-04-30 33 { 0c306bcfba2882 Ingo Molnar 2015-04-30 34 struct fpu *fpu = &target->thread.fpu; 0c306bcfba2882 Ingo Molnar 2015-04-30 35 2467897d5adf53 Thomas Gleixner 2021-06-14 36 if (!static_cpu_has(X86_FEATURE_FXSR)) 0c306bcfba2882 Ingo Molnar 2015-04-30 37 return -ENODEV; 0c306bcfba2882 Ingo Molnar 2015-04-30 38 369a036de20671 Ingo Molnar 2017-09-23 39 fpu__prepare_read(fpu); 0c306bcfba2882 Ingo Molnar 2015-04-30 40 2467897d5adf53 Thomas Gleixner 2021-06-14 41 if (!use_xsave()) { 2467897d5adf53 Thomas Gleixner 2021-06-14 42 return membuf_write(&to, &fpu->state.fxsave, 2467897d5adf53 Thomas Gleixner 2021-06-14 43 sizeof(fpu->state.fxsave)); 2467897d5adf53 Thomas Gleixner 2021-06-14 44 } 2467897d5adf53 Thomas Gleixner 2021-06-14 45 2467897d5adf53 Thomas Gleixner 2021-06-14 @46 copy_uabi_xstate_to_membuf(to, &fpu->state.xsave, XSTATE_COPY_FX); 2467897d5adf53 Thomas Gleixner 2021-06-14 47 return 0; 0c306bcfba2882 Ingo Molnar 2015-04-30 48 } 0c306bcfba2882 Ingo Molnar 2015-04-30 49 :::::: The code at line 46 was first introduced by commit :::::: 2467897d5adf53cd056c96199f8222f0fa2e5a55 x86/fpu: Use copy_uabi_xstate_to_membuf() in xfpregs_get() :::::: TO: Thomas Gleixner <tglx(a)linutronix.de&gt; :::::: CC: Thomas Gleixner <tglx(a)linutronix.de&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org