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Commit 87a8dec9 authored by NeilBrown's avatar NeilBrown
Browse files

md: simplify some 'if' conditionals in raid5_start_reshape. 



There are two consecutive 'if' statements.

 if (mddev->delta_disks >= 0)
      ....
 if (mddev->delta_disks > 0)

The code in the second is equally valid if delta_disks == 0, and these
two statements are the only place that 'added_devices' is used.

So make them a single if statement, make added_devices a local
variable, and re-indent it all.

No functional change.

Signed-off-by: default avatarNeilBrown <neilb@suse.de>
parent de171cb9

drivers/md/raid5.c

+28 −27
Original line number Diff line number Diff line
@@ -5517,7 +5517,6 @@ static int raid5_start_reshape(mddev_t *mddev) 
	raid5_conf_t *conf = mddev->private;

	mdk_rdev_t *rdev;

	int spares = 0;

	int added_devices = 0;

	unsigned long flags;



	if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery))
@@ -5571,13 +5570,15 @@ static int raid5_start_reshape(mddev_t *mddev) 
	 * to correctly record the "partially reconstructed" state of

	 * such devices during the reshape and confusion could result.

	 */

	if (mddev->delta_disks >= 0)

	if (mddev->delta_disks >= 0) {

		int added_devices = 0;

		list_for_each_entry(rdev, &mddev->disks, same_set)

			if (rdev->raid_disk < 0 &&

			    !test_bit(Faulty, &rdev->flags)) {

				if (raid5_add_disk(mddev, rdev) == 0) {

					char nm[20];

				if (rdev->raid_disk >= conf->previous_raid_disks) {

					if (rdev->raid_disk

					    >= conf->previous_raid_disks) {

						set_bit(In_sync, &rdev->flags);

						added_devices++;

					} else
@@ -5595,10 +5596,10 @@ static int raid5_start_reshape(mddev_t *mddev) 
				added_devices++;

			}



	/* When a reshape changes the number of devices, ->degraded

	 * is measured against the larger of the pre and post number of

	 * devices.*/

	if (mddev->delta_disks > 0) {

		/* When a reshape changes the number of devices,

		 * ->degraded is measured against the larger of the

		 * pre and post number of devices.

		 */

		spin_lock_irqsave(&conf->device_lock, flags);

		mddev->degraded += (conf->raid_disks - conf->previous_raid_disks)

			- added_devices;