4:17 a.m.
On 06/08/2020 00:48, kernel test robot wrote:
tree:
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head: d15fe4ec043588beee823781602ddb51d0bc84c8
commit: adcfc3482ffff813fa2c34e5902005853f79c2aa [13398/13940] sfc_ef100: read Design
Parameters at probe time
config: microblaze-randconfig-r032-20200805 (attached as .config)
compiler: microblaze-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O
~/bin/make.cross
chmod +x ~/bin/make.cross
git checkout adcfc3482ffff813fa2c34e5902005853f79c2aa
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=microblaze
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com>
All errors (new ones prefixed by >>):
microblaze-linux-ld: drivers/net/ethernet/sfc/ef100_nic.o: in function
`ef100_process_design_param':
>> drivers/net/ethernet/sfc/ef100_nic.c:610: undefined reference to `__umoddi3'
605 /* Our TXQ and RXQ sizes are always power-of-two and thus divisible by
606 * EFX_MIN_DMAQ_SIZE, so we just need to check that
607 * EFX_MIN_DMAQ_SIZE is divisible by GRANULARITY.
608 * This is very unlikely to fail.
609 */
> 610 if (EFX_MIN_DMAQ_SIZE % reader->value) {
So, this is (unsigned long)
% (u64), whichI guess doesn't go quite
as smoothly 32-bit microcontrollers (though the thought of plugging
a 100-gig smartNIC into a microblaze boggles the mind a little ;).
And none of the math64.h functions seem to have the shape we want —
div_u64_rem() wants to write the remainder through a pointer, and
do_div() wants to modify the dividend (which is a constant in this
case). So whatever I do, it's gonna be ugly :(
Maybe I should add a
static inline u32 mod_u64(u64 dividend, u32 divisor)
{
return do_div(dividend, divisor);
}
to include/linux/math64.h? At least that way the ugly is centralised
in the header file.