Calculating the total number of zones of the device using DIV_ROUND_UP() with two 64-bit arguments causes a compilation error on 32-bit arch (undefined reference to `__udivdi3'). Replace this macro with a call to round_up() to round up the device capacity to the zone size and a bit shift operation for dividing the rounded capacity by the zone size. Reported-by: kernel test robot <lkp@xxxxxxxxx> Signed-off-by: Damien Le Moal <damien.lemoal@xxxxxxx> --- drivers/block/null_blk/zoned.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/block/null_blk/zoned.c b/drivers/block/null_blk/zoned.c index 535351570bb2..fce0a54df0e5 100644 --- a/drivers/block/null_blk/zoned.c +++ b/drivers/block/null_blk/zoned.c @@ -83,7 +83,8 @@ int null_init_zoned_dev(struct nullb_device *dev, struct request_queue *q) zone_capacity_sects = mb_to_sects(dev->zone_capacity); dev_capacity_sects = mb_to_sects(dev->size); dev->zone_size_sects = mb_to_sects(dev->zone_size); - dev->nr_zones = DIV_ROUND_UP(dev_capacity_sects, dev->zone_size_sects); + dev->nr_zones = round_up(dev_capacity_sects, dev->zone_size_sects) + >> ilog2(dev->zone_size_sects); dev->zones = kvmalloc_array(dev->nr_zones, sizeof(struct nullb_zone), GFP_KERNEL | __GFP_ZERO); -- 2.29.2
