Hi Masami, I love your patch! Yet something to improve: [auto build test ERROR on linus/master] [also build test ERROR on v5.12-rc1 next-20210304] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Masami-Hiramatsu/kprobes-stacktrace-Recover-the-address-changed-by-kretprobe/20210304-212528 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git f69d02e37a85645aa90d18cacfff36dba370f797 config: parisc-allyesconfig (attached as .config) compiler: hppa-linux-gcc (GCC) 9.3.0 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 # https://github.com/0day-ci/linux/commit/2204ff150821a6a3c13b4fa10784b5efb3e3adc8 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Masami-Hiramatsu/kprobes-stacktrace-Recover-the-address-changed-by-kretprobe/20210304-212528 git checkout 2204ff150821a6a3c13b4fa10784b5efb3e3adc8 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=parisc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): kernel/kprobes.c:1847:12: warning: no previous prototype for 'kprobe_exceptions_notify' [-Wmissing-prototypes] 1847 | int __weak kprobe_exceptions_notify(struct notifier_block *self, | ^~~~~~~~~~~~~~~~~~~~~~~~ kernel/kprobes.c: In function 'kretprobe_real_stack_tsk': >> kernel/kprobes.c:1874:30: error: 'kretprobe_trampoline' undeclared (first use in this function); did you mean 'kretprobe_blackpoint'? 1874 | if (addr != (unsigned long)&kretprobe_trampoline) | ^~~~~~~~~~~~~~~~~~~~ | kretprobe_blackpoint kernel/kprobes.c:1874:30: note: each undeclared identifier is reported only once for each function it appears in kernel/kprobes.c: In function '__kretprobe_trampoline_handler': kernel/kprobes.c:1904:21: error: 'kretprobe_trampoline' undeclared (first use in this function); did you mean 'kretprobe_blackpoint'? 1904 | (unsigned long)&kretprobe_trampoline, &node); | ^~~~~~~~~~~~~~~~~~~~ | kretprobe_blackpoint vim +1874 kernel/kprobes.c 1865 1866 /* This assumes the tsk is current or the task which is not running. */ 1867 unsigned long kretprobe_real_stack_tsk(struct task_struct *tsk, 1868 unsigned long addr, 1869 struct llist_node **cur) 1870 { 1871 struct kretprobe_instance *ri = NULL; 1872 struct llist_node *node = *cur; 1873 > 1874 if (addr != (unsigned long)&kretprobe_trampoline) 1875 return addr; 1876 1877 if (!node) 1878 node = tsk->kretprobe_instances.first; 1879 else 1880 node = node->next; 1881 1882 while (node) { 1883 ri = container_of(node, struct kretprobe_instance, llist); 1884 if (ri->ret_addr != (void *)&kretprobe_trampoline) { 1885 *cur = node; 1886 return (unsigned long)ri->ret_addr; 1887 } 1888 node = node->next; 1889 } 1890 return 0; 1891 } 1892 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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