[PATCH] md: remove arbitrary limit on chunk size

The largest chunk size the code can support without substantial surgery is
2^30 bytes, so make that the limit instead of an arbitrary 4Meg.  Some day,
the 'chunksize' should change to a sector-shift instead of a byte-count.  Then
no limit would be needed.

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/md/raid6main.c b/drivers/md/raid6main.c
index bc69355e0100..e53d2d96ea3a 100644
--- a/drivers/md/raid6main.c
+++ b/drivers/md/raid6main.c
@@ -2135,8 +2135,8 @@ static int run(mddev_t *mddev)
          * 2 * (n-2) * chunksize where 'n' is the number of raid devices
          */
         {
-                int stripe = (mddev->raid_disks-2) * mddev->chunk_size
-                        / PAGE_SIZE;
+                int stripe = (mddev->raid_disks-2) *
+                        (mddev->chunk_size / PAGE_SIZE);
                 if (mddev->queue->backing_dev_info.ra_pages < 2 * stripe)
                         mddev->queue->backing_dev_info.ra_pages = 2 * stripe;
         }