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md: tidy up rdev_for_each usage.

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md.h has an 'rdev_for_each()' macro for iterating the rdevs in an
mddev.  However it uses the 'safe' version of list_for_each_entry,
and so requires the extra variable, but doesn't include 'safe' in the
name, which is useful documentation.

Consequently some places use this safe version without needing it, and
many use an explicity list_for_each entry.

So:
 - rename rdev_for_each to rdev_for_each_safe
 - create a new rdev_for_each which uses the plain
   list_for_each_entry,
 - use the 'safe' version only where needed, and convert all other
   list_for_each_entry calls to use rdev_for_each.

Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
NeilBrown
2012-03-19 12:46:39 +11:00
parent d6b42dcb99
commit dafb20fa34
11 changed files with 66 additions and 63 deletions
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8
drivers/md/raid5.c
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@@ -4842,7 +4842,7 @@ static struct r5conf *setup_conf(struct mddev *mddev)
pr_debug("raid456: run(%s) called.\n", mdname(mddev));
list_for_each_entry(rdev, &mddev->disks, same_set) {
rdev_for_each(rdev, mddev) {
raid_disk = rdev->raid_disk;
if (raid_disk >= max_disks
|| raid_disk < 0)
@@ -5177,7 +5177,7 @@ static int run(struct mddev *mddev)
blk_queue_io_opt(mddev->queue, chunk_size *
(conf->raid_disks - conf->max_degraded));
list_for_each_entry(rdev, &mddev->disks, same_set)
rdev_for_each(rdev, mddev)
disk_stack_limits(mddev->gendisk, rdev->bdev,
rdev->data_offset << 9);
}
@@ -5500,7 +5500,7 @@ static int raid5_start_reshape(struct mddev *mddev)
if (!check_stripe_cache(mddev))
return -ENOSPC;
list_for_each_entry(rdev, &mddev->disks, same_set)
rdev_for_each(rdev, mddev)
if (!test_bit(In_sync, &rdev->flags)
&& !test_bit(Faulty, &rdev->flags))
spares++;
@@ -5546,7 +5546,7 @@ static int raid5_start_reshape(struct mddev *mddev)
* such devices during the reshape and confusion could result.
*/
if (mddev->delta_disks >= 0) {
list_for_each_entry(rdev, &mddev->disks, same_set)
rdev_for_each(rdev, mddev)
if (rdev->raid_disk < 0 &&
!test_bit(Faulty, &rdev->flags)) {
if (raid5_add_disk(mddev, rdev) == 0) {