md: Make mddev->chunk_size sector-based.
This patch renames the chunk_size field to chunk_sectors with the
implied change of semantics. Since
is_power_of_2(chunk_size) = is_power_of_2(chunk_sectors << 9)
= is_power_of_2(chunk_sectors)
these bits don't need an adjustment for the shift.
Signed-off-by: Andre Noll <maan@systemlinux.org>
Signed-off-by: NeilBrown <neilb@suse.de>
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 06bef68..30029a3 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -461,7 +461,7 @@
mddev_t *mddev = q->queuedata;
sector_t sector = bvm->bi_sector + get_start_sect(bvm->bi_bdev);
int max;
- unsigned int chunk_sectors = mddev->chunk_size >> 9;
+ unsigned int chunk_sectors = mddev->chunk_sectors;
unsigned int bio_sectors = bvm->bi_size >> 9;
max = (chunk_sectors - ((sector & (chunk_sectors - 1)) + bio_sectors)) << 9;
@@ -985,7 +985,7 @@
int i;
if (conf->near_copies < conf->raid_disks)
- seq_printf(seq, " %dK chunks", mddev->chunk_size/1024);
+ seq_printf(seq, " %dK chunks", mddev->chunk_sectors / 2);
if (conf->near_copies > 1)
seq_printf(seq, " %d near-copies", conf->near_copies);
if (conf->far_copies > 1) {
@@ -2050,8 +2050,8 @@
int nc, fc, fo;
sector_t stride, size;
- if (mddev->chunk_size < PAGE_SIZE ||
- !is_power_of_2(mddev->chunk_size)) {
+ if (mddev->chunk_sectors < (PAGE_SIZE >> 9) ||
+ !is_power_of_2(mddev->chunk_sectors)) {
printk(KERN_ERR "md/raid10: chunk size must be "
"at least PAGE_SIZE(%ld) and be a power of 2.\n", PAGE_SIZE);
return -EINVAL;
@@ -2096,8 +2096,8 @@
conf->far_copies = fc;
conf->copies = nc*fc;
conf->far_offset = fo;
- conf->chunk_mask = (sector_t)(mddev->chunk_size>>9)-1;
- conf->chunk_shift = ffz(~mddev->chunk_size) - 9;
+ conf->chunk_mask = mddev->chunk_sectors - 1;
+ conf->chunk_shift = ffz(~mddev->chunk_sectors);
size = mddev->dev_sectors >> conf->chunk_shift;
sector_div(size, fc);
size = size * conf->raid_disks;
@@ -2205,7 +2205,8 @@
* maybe...
*/
{
- int stripe = conf->raid_disks * (mddev->chunk_size / PAGE_SIZE);
+ int stripe = conf->raid_disks *
+ ((mddev->chunk_sectors << 9) / PAGE_SIZE);
stripe /= conf->near_copies;
if (mddev->queue->backing_dev_info.ra_pages < 2* stripe)
mddev->queue->backing_dev_info.ra_pages = 2* stripe;