tree: git://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git arm-vmap-stacks head: 9f4b28a772c8a5fb46362418b45a779c7b8c0bc5 commit: 12e3ad2cad7748f0816216192d7554be2eca2655 [5/20] ARM: smp: Enable THREAD_INFO_IN_TASK config: arm-randconfig-r012-20211004 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project dec2257f354d39dbd8232e6bd1a417d91c4f14a2) 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 arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi # https://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git/commit/?id=12e3ad2cad7748f0816216192d7554be2eca2655 git remote add ardb git://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git git fetch --no-tags ardb arm-vmap-stacks git checkout 12e3ad2cad7748f0816216192d7554be2eca2655 # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash arch/arm/kernel/ arch/arm/mm/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All errors (new ones prefixed by >>): >> arch/arm/mm/context.c:112:28: error: no member named 'task' in 'struct thread_info' pid = task_pid_nr(thread->task) << ASID_BITS; ~~~~~~ ^ 1 error generated. vim +112 arch/arm/mm/context.c 14d8c9512aef5b Catalin Marinas 2011-11-22 100 575320d625d5b5 Will Deacon 2012-07-06 101 #ifdef CONFIG_PID_IN_CONTEXTIDR 575320d625d5b5 Will Deacon 2012-07-06 102 static int contextidr_notifier(struct notifier_block *unused, unsigned long cmd, 575320d625d5b5 Will Deacon 2012-07-06 103 void *t) 575320d625d5b5 Will Deacon 2012-07-06 104 { 575320d625d5b5 Will Deacon 2012-07-06 105 u32 contextidr; 575320d625d5b5 Will Deacon 2012-07-06 106 pid_t pid; 575320d625d5b5 Will Deacon 2012-07-06 107 struct thread_info *thread = t; 575320d625d5b5 Will Deacon 2012-07-06 108 575320d625d5b5 Will Deacon 2012-07-06 109 if (cmd != THREAD_NOTIFY_SWITCH) 575320d625d5b5 Will Deacon 2012-07-06 110 return NOTIFY_DONE; 575320d625d5b5 Will Deacon 2012-07-06 111 575320d625d5b5 Will Deacon 2012-07-06 @112 pid = task_pid_nr(thread->task) << ASID_BITS; 575320d625d5b5 Will Deacon 2012-07-06 113 asm volatile( 575320d625d5b5 Will Deacon 2012-07-06 114 " mrc p15, 0, %0, c13, c0, 1\n" ae3790b8a91642 Will Deacon 2012-08-24 115 " and %0, %0, %2\n" ae3790b8a91642 Will Deacon 2012-08-24 116 " orr %0, %0, %1\n" ae3790b8a91642 Will Deacon 2012-08-24 117 " mcr p15, 0, %0, c13, c0, 1\n" 575320d625d5b5 Will Deacon 2012-07-06 118 : "=r" (contextidr), "+r" (pid) ae3790b8a91642 Will Deacon 2012-08-24 119 : "I" (~ASID_MASK)); 575320d625d5b5 Will Deacon 2012-07-06 120 isb(); 575320d625d5b5 Will Deacon 2012-07-06 121 575320d625d5b5 Will Deacon 2012-07-06 122 return NOTIFY_OK; 575320d625d5b5 Will Deacon 2012-07-06 123 } 575320d625d5b5 Will Deacon 2012-07-06 124 :::::: The code at line 112 was first introduced by commit :::::: 575320d625d5b5eb115575a1f5e17af456e69577 ARM: 7445/1: mm: update CONTEXTIDR register to contain PID of current process :::::: TO: Will Deacon :::::: CC: Russell King --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org