diff options
Diffstat (limited to 'drivers/md/raid5.c')
| -rw-r--r-- | drivers/md/raid5.c | 20 |
1 files changed, 8 insertions, 12 deletions
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index 70ffbd071b2..20e48401910 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -50,6 +50,7 @@ #include <linux/async.h> #include <linux/seq_file.h> #include <linux/cpu.h> +#include <linux/slab.h> #include "md.h" #include "raid5.h" #include "bitmap.h" @@ -1649,8 +1650,8 @@ static sector_t raid5_compute_sector(raid5_conf_t *conf, sector_t r_sector, int previous, int *dd_idx, struct stripe_head *sh) { - long stripe; - unsigned long chunk_number; + sector_t stripe; + sector_t chunk_number; unsigned int chunk_offset; int pd_idx, qd_idx; int ddf_layout = 0; @@ -1670,17 +1671,12 @@ static sector_t raid5_compute_sector(raid5_conf_t *conf, sector_t r_sector, */ chunk_offset = sector_div(r_sector, sectors_per_chunk); chunk_number = r_sector; - BUG_ON(r_sector != chunk_number); /* * Compute the stripe number */ - stripe = chunk_number / data_disks; - - /* - * Compute the data disk and parity disk indexes inside the stripe - */ - *dd_idx = chunk_number % data_disks; + stripe = chunk_number; + *dd_idx = sector_div(stripe, data_disks); /* * Select the parity disk based on the user selected algorithm. @@ -1869,14 +1865,14 @@ static sector_t compute_blocknr(struct stripe_head *sh, int i, int previous) : conf->algorithm; sector_t stripe; int chunk_offset; - int chunk_number, dummy1, dd_idx = i; + sector_t chunk_number; + int dummy1, dd_idx = i; sector_t r_sector; struct stripe_head sh2; chunk_offset = sector_div(new_sector, sectors_per_chunk); stripe = new_sector; - BUG_ON(new_sector != stripe); if (i == sh->pd_idx) return 0; @@ -1969,7 +1965,7 @@ static sector_t compute_blocknr(struct stripe_head *sh, int i, int previous) } chunk_number = stripe * data_disks + i; - r_sector = (sector_t)chunk_number * sectors_per_chunk + chunk_offset; + r_sector = chunk_number * sectors_per_chunk + chunk_offset; check = raid5_compute_sector(conf, r_sector, previous, &dummy1, &sh2); |