Hi Christophe, kernel test robot noticed the following build warnings: [auto build test WARNING on powerpc/next] [also build test WARNING on powerpc/fixes shuah-kselftest/next shuah-kselftest/fixes linus/master v6.11-rc3] [cannot apply to crng-random/master next-20240816] [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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Christophe-Leroy/powerpc-vdso-Don-t-discard-rela-sections/20240816-223917 base: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next patch link: https://lore.kernel.org/r/376843e024ffa73793e8ed99b72d299c6b239799.1723817900.git.christophe.leroy%40csgroup.eu patch subject: [PATCH 9/9] selftests: [NOT TO BE MERGED] Modifications for testing VDSO getrandom implementation on PPC32 config: x86_64-randconfig-161-20240817 (https://download.01.org/0day-ci/archive/20240818/202408180121.HB9iN2PQ-lkp@xxxxxxxxx/config) compiler: clang version 18.1.5 (https://github.com/llvm/llvm-project 617a15a9eac96088ae5e9134248d8236e34b91b1) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202408180121.HB9iN2PQ-lkp@xxxxxxxxx/ smatch warnings: kernel/time/time.c:622 timespec64_to_jiffies() warn: always true condition '(sec >= ((((((((2147483647 >> 1) - 1) >> (32 - 10)) * ((1000000000 + 1000 / 2) / 1000)) / (1000000000)) << (1)) + (((((((2147483647 >> 1) - 1) >> (32 - 10)) * ((1000000000 + 1000 / 2) / 1000)) % (1000000000)) << (1)) + (1000000000) / 2) / (1000000000)) - 1)) => (0-u64max >= 0)' vim +622 kernel/time/time.c 8b9365d753d9870 kernel/time.c Ingo Molnar 2007-02-16 595 67b3f564cb1e769 kernel/time/time.c Randy Dunlap 2023-07-03 596 /** 67b3f564cb1e769 kernel/time/time.c Randy Dunlap 2023-07-03 597 * timespec64_to_jiffies - convert a timespec64 value to jiffies 67b3f564cb1e769 kernel/time/time.c Randy Dunlap 2023-07-03 598 * @value: pointer to &struct timespec64 67b3f564cb1e769 kernel/time/time.c Randy Dunlap 2023-07-03 599 * 8b9365d753d9870 kernel/time.c Ingo Molnar 2007-02-16 600 * The TICK_NSEC - 1 rounds up the value to the next resolution. Note 8b9365d753d9870 kernel/time.c Ingo Molnar 2007-02-16 601 * that a remainder subtract here would not do the right thing as the 4bf07f6562a01a4 kernel/time/time.c Ingo Molnar 2021-03-22 602 * resolution values don't fall on second boundaries. I.e. the line: 8b9365d753d9870 kernel/time.c Ingo Molnar 2007-02-16 603 * nsec -= nsec % TICK_NSEC; is NOT a correct resolution rounding. d78c9300c51d6ce kernel/time/time.c Andrew Hunter 2014-09-04 604 * Note that due to the small error in the multiplier here, this d78c9300c51d6ce kernel/time/time.c Andrew Hunter 2014-09-04 605 * rounding is incorrect for sufficiently large values of tv_nsec, but d78c9300c51d6ce kernel/time/time.c Andrew Hunter 2014-09-04 606 * well formed timespecs should have tv_nsec < NSEC_PER_SEC, so we're d78c9300c51d6ce kernel/time/time.c Andrew Hunter 2014-09-04 607 * OK. 8b9365d753d9870 kernel/time.c Ingo Molnar 2007-02-16 608 * 8b9365d753d9870 kernel/time.c Ingo Molnar 2007-02-16 609 * Rather, we just shift the bits off the right. 8b9365d753d9870 kernel/time.c Ingo Molnar 2007-02-16 610 * 8b9365d753d9870 kernel/time.c Ingo Molnar 2007-02-16 611 * The >> (NSEC_JIFFIE_SC - SEC_JIFFIE_SC) converts the scaled nsec 8b9365d753d9870 kernel/time.c Ingo Molnar 2007-02-16 612 * value to a scaled second value. 67b3f564cb1e769 kernel/time/time.c Randy Dunlap 2023-07-03 613 * 67b3f564cb1e769 kernel/time/time.c Randy Dunlap 2023-07-03 614 * Return: jiffies value 8b9365d753d9870 kernel/time.c Ingo Molnar 2007-02-16 615 */ 751addac78b6f20 kernel/time/time.c Arnd Bergmann 2019-10-24 616 unsigned long 751addac78b6f20 kernel/time/time.c Arnd Bergmann 2019-10-24 617 timespec64_to_jiffies(const struct timespec64 *value) 8b9365d753d9870 kernel/time.c Ingo Molnar 2007-02-16 618 { 751addac78b6f20 kernel/time/time.c Arnd Bergmann 2019-10-24 619 u64 sec = value->tv_sec; 751addac78b6f20 kernel/time/time.c Arnd Bergmann 2019-10-24 620 long nsec = value->tv_nsec + TICK_NSEC - 1; 8b9365d753d9870 kernel/time.c Ingo Molnar 2007-02-16 621 8b9365d753d9870 kernel/time.c Ingo Molnar 2007-02-16 @622 if (sec >= MAX_SEC_IN_JIFFIES){ 8b9365d753d9870 kernel/time.c Ingo Molnar 2007-02-16 623 sec = MAX_SEC_IN_JIFFIES; 8b9365d753d9870 kernel/time.c Ingo Molnar 2007-02-16 624 nsec = 0; 8b9365d753d9870 kernel/time.c Ingo Molnar 2007-02-16 625 } 9ca308506062fc4 kernel/time/time.c Baolin Wang 2015-07-29 626 return ((sec * SEC_CONVERSION) + 8b9365d753d9870 kernel/time.c Ingo Molnar 2007-02-16 627 (((u64)nsec * NSEC_CONVERSION) >> 8b9365d753d9870 kernel/time.c Ingo Molnar 2007-02-16 628 (NSEC_JIFFIE_SC - SEC_JIFFIE_SC))) >> SEC_JIFFIE_SC; 8b9365d753d9870 kernel/time.c Ingo Molnar 2007-02-16 629 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
