On Fri, May 26, 2017 at 2:23 AM, kbuild test robot <l...@intel.com> 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
