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: NeilBrown <neilb@suse.de>

diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 5044bab..fa55193 100644 (file)
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -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))
@@ -5571,34 +5570,36 @@ 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)
-           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) {
-                                       set_bit(In_sync, &rdev->flags);
-                                       added_devices++;
+       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) {
+                                               set_bit(In_sync, &rdev->flags);
+                                               added_devices++;
+                                       } else
+                                               rdev->recovery_offset = 0;
+                                       sprintf(nm, "rd%d", rdev->raid_disk);
+                                       if (sysfs_create_link(&mddev->kobj,
+                                                             &rdev->kobj, nm))
+                                               /* Failure here is OK */;
                                } else
-                                       rdev->recovery_offset = 0;
-                               sprintf(nm, "rd%d", rdev->raid_disk);
-                               if (sysfs_create_link(&mddev->kobj,
-                                                     &rdev->kobj, nm))
-                                       /* Failure here is OK */;
-                       } else
-                               break;
-               } else if (rdev->raid_disk >= conf->previous_raid_disks
-                          && !test_bit(Faulty, &rdev->flags)) {
-                       /* This is a spare that was manually added */
-                       set_bit(In_sync, &rdev->flags);
-                       added_devices++;
-               }
+                                       break;
+                       } else if (rdev->raid_disk >= conf->previous_raid_disks
+                                  && !test_bit(Faulty, &rdev->flags)) {
+                               /* This is a spare that was manually added */
+                               set_bit(In_sync, &rdev->flags);
+                               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;