md: Represent raid device size in sectors.

This patch renames the "size" field of struct mdk_rdev_s to
"sectors" and changes this field to store sectors instead of
blocks.

All users of this field, linear.c, raid0.c and md.c, are fixed up
accordingly which gets rid of many multiplications and divisions.

Signed-off-by: Andre Noll <maan@systemlinux.org>
Signed-off-by: NeilBrown <neilb@suse.de>

1 files changed, 20 insertions, 21 deletions

diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c
index 3d06df86da87..9aebb4c93b60 100644
--- a/drivers/md/raid0.c
+++ b/drivers/md/raid0.c
@@ -76,16 +76,15 @@ static int create_strip_zones (mddev_t *mddev)
                 list_for_each_entry(rdev2, &mddev->disks, same_set) {
                         printk(KERN_INFO "raid0:   comparing %s(%llu)",
                                bdevname(rdev1->bdev,b),
-                               (unsigned long long)rdev1->size);
+                               (unsigned long long)rdev1->sectors);
                         printk(KERN_INFO " with %s(%llu)\n",
                                bdevname(rdev2->bdev,b),
-                               (unsigned long long)rdev2->size);
+                               (unsigned long long)rdev2->sectors);
                         if (rdev2 == rdev1) {
                                 printk(KERN_INFO "raid0:   END\n");
                                 break;
                         }
-                        if (rdev2->size == rdev1->size)
-                        {
+                        if (rdev2->sectors == rdev1->sectors) {
                                 /*
                                  * Not unique, don't count it as a new
                                  * group
@@ -148,7 +147,7 @@ static int create_strip_zones (mddev_t *mddev)
                     mddev->queue->max_sectors > (PAGE_SIZE>>9))
                         blk_queue_max_sectors(mddev->queue, PAGE_SIZE>>9);
 
-                if (!smallest || (rdev1->size <smallest->size))
+                if (!smallest || (rdev1->sectors < smallest->sectors))
                         smallest = rdev1;
                 cnt++;
         }
@@ -158,10 +157,10 @@ static int create_strip_zones (mddev_t *mddev)
                 goto abort;
         }
         zone->nb_dev = cnt;
-        zone->sectors = smallest->size * cnt * 2;
+        zone->sectors = smallest->sectors * cnt;
         zone->zone_start = 0;
 
-        current_start = smallest->size * 2;
+        current_start = smallest->sectors;
         curr_zone_start = zone->sectors;
 
         /* now do the other zones */
@@ -180,29 +179,29 @@ static int create_strip_zones (mddev_t *mddev)
                         rdev = conf->strip_zone[0].dev[j];
                         printk(KERN_INFO "raid0: checking %s ...",
                                 bdevname(rdev->bdev, b));
-                        if (rdev->size > current_start / 2) {
-                                printk(KERN_INFO " contained as device %d\n",
-                                        c);
-                                zone->dev[c] = rdev;
-                                c++;
-                                if (!smallest || (rdev->size <smallest->size)) {
-                                        smallest = rdev;
-                                        printk(KERN_INFO "  (%llu) is smallest!.\n",
-                                                (unsigned long long)rdev->size);
-                                }
-                        } else
+                        if (rdev->sectors <= current_start) {
                                 printk(KERN_INFO " nope.\n");
+                                continue;
+                        }
+                        printk(KERN_INFO " contained as device %d\n", c);
+                        zone->dev[c] = rdev;
+                        c++;
+                        if (!smallest || rdev->sectors < smallest->sectors) {
+                                smallest = rdev;
+                                printk(KERN_INFO "  (%llu) is smallest!.\n",
+                                        (unsigned long long)rdev->sectors);
+                        }
                 }
 
                 zone->nb_dev = c;
-                zone->sectors = (smallest->size * 2 - current_start) * c;
+                zone->sectors = (smallest->sectors - current_start) * c;
                 printk(KERN_INFO "raid0: zone->nb_dev: %d, sectors: %llu\n",
                         zone->nb_dev, (unsigned long long)zone->sectors);
 
                 zone->zone_start = curr_zone_start;
                 curr_zone_start += zone->sectors;
 
-                current_start = smallest->size * 2;
+                current_start = smallest->sectors;
                 printk(KERN_INFO "raid0: current zone start: %llu\n",
                         (unsigned long long)current_start);
         }
@@ -296,7 +295,7 @@ static int raid0_run (mddev_t *mddev)
         /* calculate array device size */
         mddev->array_sectors = 0;
         list_for_each_entry(rdev, &mddev->disks, same_set)
-                mddev->array_sectors += rdev->size * 2;
+                mddev->array_sectors += rdev->sectors;
 
         printk(KERN_INFO "raid0 : md_size is %llu sectors.\n",
                 (unsigned long long)mddev->array_sectors);