tree: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git tmp.tmp2 head: adcceb5eb7aee38e4a9c15bdf599655f0e1b1324 commit: ae74b8bd2e5fd9dbe3177aaf3080799272becb8d [237/364] sched/headers, x86/compat: Simplify <asm/compat.h> config: x86_64-rhel-8.3 (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/tip/tip.git/commit/?id=ae... git remote add tip https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git git fetch --no-tags tip tmp.tmp2 git checkout ae74b8bd2e5fd9dbe3177aaf3080799272becb8d # 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 >>): In file included from include/linux/radix-tree.h:16, from include/linux/idr.h:15, from include/linux/kernfs.h:13, from include/linux/sysfs.h:16, from include/linux/kobject.h:20, from include/linux/cdev.h:5, from drivers/gpio/gpiolib-cdev.c:7: include/linux/rcuwait.h: In function 'rcuwait_active': include/linux/rcupdate.h:364:9: error: dereferencing pointer to incomplete type 'struct task_struct' 364 | typeof(*p) *_________p1 = (typeof(*p) *__force)READ_ONCE(p); \ | ^ include/linux/rcupdate.h:474:31: note: in expansion of macro '__rcu_access_pointer' 474 | #define rcu_access_pointer(p) __rcu_access_pointer((p), __rcu) | ^~~~~~~~~~~~~~~~~~~~ include/linux/rcuwait.h:33:11: note: in expansion of macro 'rcu_access_pointer' 33 | return !!rcu_access_pointer(w->task); | ^~~~~~~~~~~~~~~~~~ In file included from include/linux/thread_info.h:50, from include/linux/uio.h:9, from include/linux/socket.h:8, from include/linux/compat.h:15, from drivers/gpio/gpiolib-cdev.c:8: drivers/gpio/gpiolib-cdev.c: In function 'lineevent_read': 224 | current_thread_info()->status & TS_COMPAT) | ^~~~~~~~~~~~~~~~~~~ arch/x86/include/asm/compat.h:175:43: note: in expansion of macro 'in_ia32_syscall' 175 | #define compat_need_64bit_alignment_fixup in_ia32_syscall | ^~~~~~~~~~~~~~~ drivers/gpio/gpiolib-cdev.c:1533:6: note: in expansion of macro 'compat_need_64bit_alignment_fixup' 1533 | if (compat_need_64bit_alignment_fixup()) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 224 | current_thread_info()->status & TS_COMPAT) | ^~ arch/x86/include/asm/compat.h:175:43: note: in expansion of macro 'in_ia32_syscall' 175 | #define compat_need_64bit_alignment_fixup in_ia32_syscall | ^~~~~~~~~~~~~~~ drivers/gpio/gpiolib-cdev.c:1533:6: note: in expansion of macro 'compat_need_64bit_alignment_fixup' 1533 | if (compat_need_64bit_alignment_fixup()) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/uaccess.h:11, from include/linux/compat.h:19, from drivers/gpio/gpiolib-cdev.c:8: drivers/gpio/gpiolib-cdev.c: At top level: arch/x86/include/asm/uaccess.h:46:20: warning: 'pagefault_disabled' used but never defined 46 | static inline bool pagefault_disabled(void); | ^~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +224 arch/x86/include/asm/thread_info.h ef334a20d84f52 Srikar Dronamraju 2012-03-13 219 ef334a20d84f52 Srikar Dronamraju 2012-03-13 220 #ifdef CONFIG_X86_32 b9d989c7218ac9 Andy Lutomirski 2016-09-13 221 #define in_ia32_syscall() true b9d989c7218ac9 Andy Lutomirski 2016-09-13 222 #else b9d989c7218ac9 Andy Lutomirski 2016-09-13 223 #define in_ia32_syscall() (IS_ENABLED(CONFIG_IA32_EMULATION) && \ 37a8f7c38339b2 Andy Lutomirski 2018-01-28 @224 current_thread_info()->status & TS_COMPAT) ef334a20d84f52 Srikar Dronamraju 2012-03-13 225 #endif 1daeaa315164c6 Brian Gerst 2015-03-21 226 :::::: The code at line 224 was first introduced by commit :::::: 37a8f7c38339b22b69876d6f5a0ab851565284e3 x86/asm: Move 'status' from thread_struct to thread_info :::::: TO: Andy Lutomirski <luto(a)kernel.org&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