On Fri, May 26, 2017 at 2:23 AM, kbuild test robot <lkp@xxxxxxxxx> wrote: > Hi Xiang, > > [auto build test ERROR on mkp-scsi/for-next] > [also build test ERROR on v4.12-rc2 next-20170525] > [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] > > url: https://github.com/0day-ci/linux/commits/John-Garry/hisi_sas-hip08-support/20170526-011153 > base: https://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git for-next > config: i386-allmodconfig (attached as .config) > compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901 > reproduce: > # save the attached .config to linux build tree > make ARCH=i386 > > All errors (new ones prefixed by >>): > >>> ERROR: "__umoddi3" [drivers/scsi/hisi_sas/hisi_sas_main.ko] undefined! I think it must come from this line: + int queue_id = sas_dev->device_id % hisi_hba->queue_count; Doing a 64-bit division seems like a rather inefficient way to pick a queue, especially if you do it on each request. Can you store the queue_id in sas_dev itself, or use a mask to generate it instead? Arnd
