Hi Anton, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on powerpc/next] [also build test WARNING on linux/master linus/master v5.6-rc6 next-20200317] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Anton-Blanchard/powerpc-vdso-Fix-multiple-issues-with-sys_call_table/20200306-134043 base: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next config: powerpc-randconfig-a001-20200318 (attached as .config) compiler: powerpc-linux-gcc (GCC) 9.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree GCC_VERSION=9.2.0 make.cross ARCH=powerpc If you fix the issue, kindly add following tag Reported-by: kbuild test robot All warnings (new ones prefixed by >>): arch/powerpc/kernel/vdso.c: In function 'vdso_setup_syscall_map': >> arch/powerpc/kernel/vdso.c:662:25: warning: comparison between pointer and integer 662 | if (sys_call_table[i] != sys_ni_syscall) | ^~ vim +662 arch/powerpc/kernel/vdso.c a7f290dad32ee3 Benjamin Herrenschmidt 2005-11-11 641 a7f290dad32ee3 Benjamin Herrenschmidt 2005-11-11 642 /* a7f290dad32ee3 Benjamin Herrenschmidt 2005-11-11 643 * Called from setup_arch to initialize the bitmap of available a7f290dad32ee3 Benjamin Herrenschmidt 2005-11-11 644 * syscalls in the systemcfg page a7f290dad32ee3 Benjamin Herrenschmidt 2005-11-11 645 */ a7f290dad32ee3 Benjamin Herrenschmidt 2005-11-11 646 static void __init vdso_setup_syscall_map(void) a7f290dad32ee3 Benjamin Herrenschmidt 2005-11-11 647 { a7f290dad32ee3 Benjamin Herrenschmidt 2005-11-11 648 unsigned int i; 457c1792bcc570 Anton Blanchard 2020-03-06 649 unsigned long ni_syscall; a7f290dad32ee3 Benjamin Herrenschmidt 2005-11-11 650 457c1792bcc570 Anton Blanchard 2020-03-06 651 ni_syscall = (unsigned long)dereference_kernel_function_descriptor(sys_ni_syscall); a7f290dad32ee3 Benjamin Herrenschmidt 2005-11-11 652 f43194e45852b0 Rashmica Gupta 2015-11-19 653 for (i = 0; i < NR_syscalls; i++) { a7f290dad32ee3 Benjamin Herrenschmidt 2005-11-11 654 #ifdef CONFIG_PPC64 457c1792bcc570 Anton Blanchard 2020-03-06 655 if (sys_call_table[i] != ni_syscall) a7f290dad32ee3 Benjamin Herrenschmidt 2005-11-11 656 vdso_data->syscall_map_64[i >> 5] |= a7f290dad32ee3 Benjamin Herrenschmidt 2005-11-11 657 0x80000000UL >> (i & 0x1f); 457c1792bcc570 Anton Blanchard 2020-03-06 658 if (compat_sys_call_table[i] != ni_syscall) a7f290dad32ee3 Benjamin Herrenschmidt 2005-11-11 659 vdso_data->syscall_map_32[i >> 5] |= a7f290dad32ee3 Benjamin Herrenschmidt 2005-11-11 660 0x80000000UL >> (i & 0x1f); a7f290dad32ee3 Benjamin Herrenschmidt 2005-11-11 661 #else /* CONFIG_PPC64 */ a7f290dad32ee3 Benjamin Herrenschmidt 2005-11-11 @662 if (sys_call_table[i] != sys_ni_syscall) a7f290dad32ee3 Benjamin Herrenschmidt 2005-11-11 663 vdso_data->syscall_map_32[i >> 5] |= a7f290dad32ee3 Benjamin Herrenschmidt 2005-11-11 664 0x80000000UL >> (i & 0x1f); a7f290dad32ee3 Benjamin Herrenschmidt 2005-11-11 665 #endif /* CONFIG_PPC64 */ a7f290dad32ee3 Benjamin Herrenschmidt 2005-11-11 666 } a7f290dad32ee3 Benjamin Herrenschmidt 2005-11-11 667 } a7f290dad32ee3 Benjamin Herrenschmidt 2005-11-11 668 :::::: The code at line 662 was first introduced by commit :::::: a7f290dad32ee34d931561b7943c858fe2aae503 [PATCH] powerpc: Merge vdso's and add vdso support to 32 bits kernel :::::: TO: Benjamin Herrenschmidt :::::: CC: Paul Mackerras --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org