null_blk: cleanup zoned mode initialization

To avoid potential compilation problems, replaced the badly written
MB_TO_SECTS() macro (missing parenthesis around the argument use) with
the inline function mb_to_sects(). And while at it, simplify the
calculation of the total number of zones of the device using the
round_up() macro.

Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/drivers/block/null_blk/zoned.c b/drivers/block/null_blk/zoned.c
index 148b871..fce0a54 100644 (file)
--- a/drivers/block/null_blk/zoned.c
+++ b/drivers/block/null_blk/zoned.c
@@ -6,7 +6,10 @@
 #define CREATE_TRACE_POINTS
 #include "trace.h"
 
-#define MB_TO_SECTS(mb) (((sector_t)mb * SZ_1M) >> SECTOR_SHIFT)
+static inline sector_t mb_to_sects(unsigned long mb)
+{
+       return ((sector_t)mb * SZ_1M) >> SECTOR_SHIFT;
+}
 
 static inline unsigned int null_zone_no(struct nullb_device *dev, sector_t sect)
 {
@@ -77,12 +80,11 @@ int null_init_zoned_dev(struct nullb_device *dev, struct request_queue *q)
                return -EINVAL;
        }
 
-       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 = dev_capacity_sects >> ilog2(dev->zone_size_sects);
-       if (dev_capacity_sects & (dev->zone_size_sects - 1))
-               dev->nr_zones++;
+       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 = 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);