Signed-off-by: Sandeep K Sinha <sandeepksinha@xxxxxxxxx>
Date: Fri May 22 13:46:56 2009 +0530
Protecting mddev with barriers to avoid races.
diff --git a/drivers/md/linear.c b/drivers/md/linear.c
index 9ad6ec4..e2dbda8 100644
--- a/drivers/md/linear.c
+++ b/drivers/md/linear.c
@@ -28,10 +28,12 @@
static inline dev_info_t *which_dev(mddev_t *mddev, sector_t sector)
{
int lo, mid, hi;
- linear_conf_t *conf = mddev_to_conf(mddev);
+ linear_conf_t *conf;
lo = 0;
hi = mddev->raid_disks - 1;
+ barrier();
+ conf = mddev_to_conf(mddev);
/*
* Binary Search
@@ -223,6 +225,7 @@ static int linear_add(mddev_t *mddev, mdk_rdev_t *rdev)
newconf->prev = mddev_to_conf(mddev);
mddev->private = newconf;
+ barrier();
mddev->raid_disks++;
md_set_array_sectors(mddev, linear_size(mddev, 0, 0));
set_capacity(mddev->gendisk, mddev->array_sectors);
--
Regards,
Sandeep.
“To learn is to change. Education is a process that changes the learner.”
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