10:02 a.m.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git x86/entry
head: a55e3844bc8afc350ee4efd87442c9c74f101b34
commit: 0e43d3bd147e265b320614052d684f1a4767fd1f [12/16] x86/entry: Use generic syscall
exit functionality
config: x86_64-randconfig-r025-20200719 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project
3504acc33e8b9ddd7de71d75cdc329a14dbf58d9)
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 x86_64 cross compiling tool for clang build
# apt-get install binutils-x86-64-linux-gnu
git checkout 0e43d3bd147e265b320614052d684f1a4767fd1f
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com>
All warnings (new ones prefixed by >>):
> arch/x86/kernel/signal.c:806:6: warning: no previous prototype
for function 'arch_do_signal' [-Wmissing-prototypes]
void
arch_do_signal(struct pt_regs *regs)
^
arch/x86/kernel/signal.c:806:1: note: declare 'static' if the function is not
intended to be used outside of this translation unit
void arch_do_signal(struct pt_regs *regs)
^
static
1 warning generated.
vim +/arch_do_signal +806 arch/x86/kernel/signal.c
800
801 /*
802 * Note that 'init' is a special process: it doesn't get signals it
doesn't
803 * want to handle. Thus you cannot kill init even with a SIGKILL even by
804 * mistake.
805 */
806 void arch_do_signal(struct pt_regs *regs)
807 {
808 struct ksignal ksig;
809
810 if (get_signal(&ksig)) {
811 /* Whee! Actually deliver the signal. */
812 handle_signal(&ksig, regs);
813 return;
814 }
815
816 /* Did we come from a system call? */
817 if (syscall_get_nr(current, regs) >= 0) {
818 /* Restart the system call - no handlers present */
819 switch (syscall_get_error(current, regs)) {
820 case -ERESTARTNOHAND:
821 case -ERESTARTSYS:
822 case -ERESTARTNOINTR:
823 regs->ax = regs->orig_ax;
824 regs->ip -= 2;
825 break;
826
827 case -ERESTART_RESTARTBLOCK:
828 regs->ax = get_nr_restart_syscall(regs);
829 regs->ip -= 2;
830 break;
831 }
832 }
833
834 /*
835 * If there's no signal to deliver, we just put the saved sigmask
836 * back.
837 */
838 restore_saved_sigmask();
839 }
840
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org