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-rhel-8.3-kselftests (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # 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 make W=1 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 >>): arch/x86/kernel/fpu/regset.c: In function 'xfpregs_get': 46 | copy_uabi_xstate_to_membuf(to, &fpu->state.xsave, XSTATE_COPY_FX); | ^~~~~~~~~~~~~~~~~ | | | struct xregs_state * In file included from arch/x86/include/asm/pkru.h:5, from arch/x86/include/asm/pgtable.h:26, from include/linux/pgtable.h:6, from include/linux/mm.h:33, from arch/x86/include/asm/fpu/internal.h:17, from arch/x86/kernel/fpu/regset.c:8: arch/x86/include/asm/fpu/xstate.h:142:71: note: expected 'struct task_struct *' but argument is of type 'struct xregs_state *' 142 | void copy_uabi_xstate_to_membuf(struct membuf to, struct task_struct *tsk, | ~~~~~~~~~~~~~~~~~~~~^~~ arch/x86/kernel/fpu/regset.c: In function 'fpregs_get': arch/x86/kernel/fpu/regset.c:303:34: error: passing argument 2 of 'copy_uabi_xstate_to_membuf' from incompatible pointer type [-Werror=incompatible-pointer-types] 303 | copy_uabi_xstate_to_membuf(mb, &fpu->state.xsave, XSTATE_COPY_FP); | ^~~~~~~~~~~~~~~~~ | | | struct xregs_state * In file included from arch/x86/include/asm/pkru.h:5, from arch/x86/include/asm/pgtable.h:26, from include/linux/pgtable.h:6, from include/linux/mm.h:33, from arch/x86/include/asm/fpu/internal.h:17, from arch/x86/kernel/fpu/regset.c:8: arch/x86/include/asm/fpu/xstate.h:142:71: note: expected 'struct task_struct *' but argument is of type 'struct xregs_state *' 142 | void copy_uabi_xstate_to_membuf(struct membuf to, struct task_struct *tsk, | ~~~~~~~~~~~~~~~~~~~~^~~ cc1: some warnings being treated as errors -- arch/x86/kernel/fpu/xstate.c: In function 'copy_uabi_xstate_to_membuf': 1070 | pkru.pkru = target->thread.pkru; | ^~~~~~ arch/x86/kernel/fpu/xstate.c:1070:16: note: each undeclared identifier is reported only once for each function it appears in vim +/copy_uabi_xstate_to_membuf +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