+++ /dev/null
-From 35f2a591192d0a5d9f7fc696869c76f0b8e49c3d Mon Sep 17 00:00:00 2001
-From: NeilBrown <neilb@suse.de>
-Date: Tue, 20 Apr 2010 14:13:34 +1000
-Subject: md/raid5: allow for more than 2^31 chunks.
-
-From: NeilBrown <neilb@suse.de>
-
-commit 35f2a591192d0a5d9f7fc696869c76f0b8e49c3d upstream.
-
-With many large drives and small chunk sizes it is possible
-to create a RAID5 with more than 2^31 chunks. Make sure this
-works.
-
-Reported-by: Brett King <king.br@gmail.com>
-Signed-off-by: NeilBrown <neilb@suse.de>
-Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-
----
- drivers/md/raid5.c | 19 +++++++------------
- 1 file changed, 7 insertions(+), 12 deletions(-)
-
---- a/drivers/md/raid5.c
-+++ b/drivers/md/raid5.c
-@@ -1649,8 +1649,8 @@ static sector_t raid5_compute_sector(rai
- 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 +1670,12 @@ static sector_t raid5_compute_sector(rai
- */
- 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 +1864,14 @@ static sector_t compute_blocknr(struct s
- : 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 +1964,7 @@ static sector_t compute_blocknr(struct s
- }
-
- 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);