[PATCH] md: remove 'working_disks' from raid10 state

It isn't needed as mddev->degraded contains equivalent info.

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

2 files changed, 4 insertions, 9 deletions

diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 85e3df2d268a..233a4faede94 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -921,7 +921,7 @@ static void status(struct seq_file *seq, mddev_t *mddev)
                         seq_printf(seq, " %d far-copies", conf->far_copies);
         }
         seq_printf(seq, " [%d/%d] [", conf->raid_disks,
-                                                conf->working_disks);
+                                        conf->raid_disks - mddev->degraded);
         for (i = 0; i < conf->raid_disks; i++)
                 seq_printf(seq, "%s",
                               conf->mirrors[i].rdev &&
@@ -941,7 +941,7 @@ static void error(mddev_t *mddev, mdk_rdev_t *rdev)
          * else mark the drive as failed
          */
         if (test_bit(In_sync, &rdev->flags)
-            && conf->working_disks == 1)
+            && conf->raid_disks-mddev->degraded == 1)
                 /*
                  * Don't fail the drive, just return an IO error.
                  * The test should really be more sophisticated than
@@ -952,7 +952,6 @@ static void error(mddev_t *mddev, mdk_rdev_t *rdev)
                 return;
         if (test_bit(In_sync, &rdev->flags)) {
                 mddev->degraded++;
-                conf->working_disks--;
                 /*
                  * if recovery is running, make sure it aborts.
                  */
@@ -963,7 +962,7 @@ static void error(mddev_t *mddev, mdk_rdev_t *rdev)
         set_bit(MD_CHANGE_DEVS, &mddev->flags);
         printk(KERN_ALERT "raid10: Disk failure on %s, disabling device. \n"
                 "       Operation continuing on %d devices\n",
-                bdevname(rdev->bdev,b), conf->working_disks);
+                bdevname(rdev->bdev,b), conf->raid_disks - mddev->degraded);
 }
 
 static void print_conf(conf_t *conf)
@@ -976,7 +975,7 @@ static void print_conf(conf_t *conf)
                 printk("(!conf)\n");
                 return;
         }
-        printk(" --- wd:%d rd:%d\n", conf->working_disks,
+        printk(" --- wd:%d rd:%d\n", conf->raid_disks - conf->mddev->degraded,
                 conf->raid_disks);
 
         for (i = 0; i < conf->raid_disks; i++) {
@@ -1035,7 +1034,6 @@ static int raid10_spare_active(mddev_t *mddev)
                 if (tmp->rdev
                     && !test_bit(Faulty, &tmp->rdev->flags)
                     && !test_bit(In_sync, &tmp->rdev->flags)) {
-                        conf->working_disks++;
                         mddev->degraded--;
                         set_bit(In_sync, &tmp->rdev->flags);
                 }
@@ -2035,8 +2033,6 @@ static int run(mddev_t *mddev)
                         mddev->queue->max_sectors = (PAGE_SIZE>>9);
 
                 disk->head_position = 0;
-                if (!test_bit(Faulty, &rdev->flags) && test_bit(In_sync, &rdev->flags))
-                        conf->working_disks++;
         }
         conf->raid_disks = mddev->raid_disks;
         conf->mddev = mddev;
diff --git a/include/linux/raid/raid10.h b/include/linux/raid/raid10.h
index c41e56a7c090..e9091cfeb286 100644
--- a/include/linux/raid/raid10.h
+++ b/include/linux/raid/raid10.h
@@ -16,7 +16,6 @@ struct r10_private_data_s {
         mddev_t                 *mddev;
         mirror_info_t           *mirrors;
         int                     raid_disks;
-        int                     working_disks;
         spinlock_t              device_lock;
 
         /* geometry */