tree: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git tmp.tmp2 head: adcceb5eb7aee38e4a9c15bdf599655f0e1b1324 commit: a8bbfcd6b3ffac4ebcc0deb770d628fe6b8f2d05 [108/364] sched/headers: Remove <linux/mutex.h> from <linux/sched.h> config: i386-defconfig (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=a8... 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 a8bbfcd6b3ffac4ebcc0deb770d628fe6b8f2d05 # save the attached .config to linux build tree make W=1 ARCH=i386 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/export.h:43, from include/linux/linkage.h:7, from include/linux/kernel.h:10, from kernel/locking/rwsem.c:19: arch/x86/include/asm/uaccess.h: In function 'user_access_begin': 47 | WARN_ON_ONCE(!in_task() && !pagefault_disabled()) | ^~~~~~~ include/linux/compiler.h:78:42: note: in definition of macro 'unlikely' 78 | # define unlikely(x) __builtin_expect(!!(x), 0) | ^ arch/x86/include/asm/uaccess.h:47:2: note: in expansion of macro 'WARN_ON_ONCE' 47 | WARN_ON_ONCE(!in_task() && !pagefault_disabled()) | ^~~~~~~~~~~~ arch/x86/include/asm/uaccess.h:71:2: note: in expansion of macro 'WARN_ON_IN_IRQ' 71 | WARN_ON_IN_IRQ(); \ | ^~~~~~~~~~~~~~ arch/x86/include/asm/uaccess.h:476:16: note: in expansion of macro 'access_ok' 476 | if (unlikely(!access_ok(ptr,len))) | ^~~~~~~~~ cc1: some warnings being treated as errors vim +47 arch/x86/include/asm/uaccess.h ca23386216b9d4 include/asm-x86/uaccess.h Glauber Costa 2008-06-13 43 7c4788950ba592 arch/x86/include/asm/uaccess.h Peter Zijlstra 2016-11-22 44 #ifdef CONFIG_DEBUG_ATOMIC_SLEEP 2d8d8fac3b4eab arch/x86/include/asm/uaccess.h Masami Hiramatsu 2019-05-15 45 static inline bool pagefault_disabled(void); 2d8d8fac3b4eab arch/x86/include/asm/uaccess.h Masami Hiramatsu 2019-05-15 46 # define WARN_ON_IN_IRQ() \ 2d8d8fac3b4eab arch/x86/include/asm/uaccess.h Masami Hiramatsu 2019-05-15 @47 WARN_ON_ONCE(!in_task() && !pagefault_disabled()) 7c4788950ba592 arch/x86/include/asm/uaccess.h Peter Zijlstra 2016-11-22 48 #else 7c4788950ba592 arch/x86/include/asm/uaccess.h Peter Zijlstra 2016-11-22 49 # define WARN_ON_IN_IRQ() 7c4788950ba592 arch/x86/include/asm/uaccess.h Peter Zijlstra 2016-11-22 50 #endif 7c4788950ba592 arch/x86/include/asm/uaccess.h Peter Zijlstra 2016-11-22 51 :::::: The code at line 47 was first introduced by commit :::::: 2d8d8fac3b4eab035dcd0068e1f5a746a697fbb3 x86/uaccess: Allow access_ok() in irq context if pagefault_disabled :::::: TO: Masami Hiramatsu <mhiramat(a)kernel.org&gt; :::::: CC: Steven Rostedt (VMware) <rostedt(a)goodmis.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org