Hi Dmitry, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on 62918e6fd7b5751c1285c7f8c6cbd27eb6600c02] url: https://github.com/0day-ci/linux/commits/Dmitry-Safonov/Add-generic-vdso_base-tracking/20201124-083732 base: 62918e6fd7b5751c1285c7f8c6cbd27eb6600c02 config: i386-randconfig-s001-20201123 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.3-134-gb59dbdaf-dirty # https://github.com/0day-ci/linux/commit/bef228ec5535f5941e842ca57e7bd54d23427cde git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Dmitry-Safonov/Add-generic-vdso_base-tracking/20201124-083732 git checkout bef228ec5535f5941e842ca57e7bd54d23427cde # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> "sparse warnings: (new ones prefixed by >>)" >> arch/x86/entry/vdso/extable.c:28:36: sparse: sparse: incompatible types in comparison expression (different address spaces): >> arch/x86/entry/vdso/extable.c:28:36: sparse: void [noderef] __user * >> arch/x86/entry/vdso/extable.c:28:36: sparse: void * vim +28 arch/x86/entry/vdso/extable.c 11 12 bool fixup_vdso_exception(struct pt_regs *regs, int trapnr, 13 unsigned long error_code, unsigned long fault_addr) 14 { 15 const struct vdso_image *image = current->mm->context.vdso_image; 16 const struct vdso_exception_table_entry *extable; 17 unsigned int nr_entries, i; 18 unsigned long base; 19 20 /* 21 * Do not attempt to fixup #DB or #BP. It's impossible to identify 22 * whether or not a #DB/#BP originated from within an SGX enclave and 23 * SGX enclaves are currently the only use case for vDSO fixup. 24 */ 25 if (trapnr == X86_TRAP_DB || trapnr == X86_TRAP_BP) 26 return false; 27 > 28 if (current->mm->vdso_base == (void *)UNMAPPED_VDSO_BASE) --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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