Merge branch 'for-linus' of git://neil.brown.name/md

* 'for-linus' of git://neil.brown.name/md:
  md: resolve confusion of MD_CHANGE_CLEAN
  md: don't clear MD_CHANGE_CLEAN in md_update_sb() for external arrays
  Move .gitignore from drivers/md to lib/raid6

drivers/md/.gitignore

@@ -1,4 +0,0 @@
-mktables
-raid6altivec*.c
-raid6int*.c
-raid6tables.c

drivers/md/bitmap.c

@@ -1542,8 +1542,7 @@ void bitmap_cond_end_sync(struct bitmap *bitmap, sector_t sector)
 		   atomic_read(&bitmap->mddev->recovery_active) == 0);
 
 	bitmap->mddev->curr_resync_completed = bitmap->mddev->curr_resync;
-	if (bitmap->mddev->persistent)
-		set_bit(MD_CHANGE_CLEAN, &bitmap->mddev->flags);
+	set_bit(MD_CHANGE_CLEAN, &bitmap->mddev->flags);
 	sector &= ~((1ULL << CHUNK_BLOCK_SHIFT(bitmap)) - 1);
 	s = 0;
 	while (s < sector && s < bitmap->mddev->resync_max_sectors) {

drivers/md/md.c

@@ -2167,9 +2167,9 @@ repeat:
 				rdev->recovery_offset = mddev->curr_resync_completed;
 
 	}	
-	if (mddev->external || !mddev->persistent) {
-		clear_bit(MD_CHANGE_DEVS, &mddev->flags);
+	if (!mddev->persistent) {
 		clear_bit(MD_CHANGE_CLEAN, &mddev->flags);
+		clear_bit(MD_CHANGE_DEVS, &mddev->flags);
 		wake_up(&mddev->sb_wait);
 		return;
 	}
@@ -2178,7 +2178,6 @@ repeat:
 
 	mddev->utime = get_seconds();
 
-	set_bit(MD_CHANGE_PENDING, &mddev->flags);
 	if (test_and_clear_bit(MD_CHANGE_DEVS, &mddev->flags))
 		force_change = 1;
 	if (test_and_clear_bit(MD_CHANGE_CLEAN, &mddev->flags))
@@ -3371,7 +3370,7 @@ array_state_show(mddev_t *mddev, char *page)
 		case 0:
 			if (mddev->in_sync)
 				st = clean;
-			else if (test_bit(MD_CHANGE_CLEAN, &mddev->flags))
+			else if (test_bit(MD_CHANGE_PENDING, &mddev->flags))
 				st = write_pending;
 			else if (mddev->safemode)
 				st = active_idle;
@@ -3452,9 +3451,7 @@ array_state_store(mddev_t *mddev, const char *buf, size_t len)
 					mddev->in_sync = 1;
 					if (mddev->safemode == 1)
 						mddev->safemode = 0;
-					if (mddev->persistent)
-						set_bit(MD_CHANGE_CLEAN,
-							&mddev->flags);
+					set_bit(MD_CHANGE_CLEAN, &mddev->flags);
 				}
 				err = 0;
 			} else
@@ -3466,8 +3463,7 @@ array_state_store(mddev_t *mddev, const char *buf, size_t len)
 	case active:
 		if (mddev->pers) {
 			restart_array(mddev);
-			if (mddev->external)
-				clear_bit(MD_CHANGE_CLEAN, &mddev->flags);
+			clear_bit(MD_CHANGE_PENDING, &mddev->flags);
 			wake_up(&mddev->sb_wait);
 			err = 0;
 		} else {
@@ -6572,6 +6568,7 @@ void md_write_start(mddev_t *mddev, struct bio *bi)
 		if (mddev->in_sync) {
 			mddev->in_sync = 0;
 			set_bit(MD_CHANGE_CLEAN, &mddev->flags);
+			set_bit(MD_CHANGE_PENDING, &mddev->flags);
 			md_wakeup_thread(mddev->thread);
 			did_change = 1;
 		}
@@ -6580,7 +6577,6 @@ void md_write_start(mddev_t *mddev, struct bio *bi)
 	if (did_change)
 		sysfs_notify_dirent_safe(mddev->sysfs_state);
 	wait_event(mddev->sb_wait,
-		   !test_bit(MD_CHANGE_CLEAN, &mddev->flags) &&
 		   !test_bit(MD_CHANGE_PENDING, &mddev->flags));
 }
 
@@ -6616,6 +6612,7 @@ int md_allow_write(mddev_t *mddev)
 	if (mddev->in_sync) {
 		mddev->in_sync = 0;
 		set_bit(MD_CHANGE_CLEAN, &mddev->flags);
+		set_bit(MD_CHANGE_PENDING, &mddev->flags);
 		if (mddev->safemode_delay &&
 		    mddev->safemode == 0)
 			mddev->safemode = 1;
@@ -6625,7 +6622,7 @@ int md_allow_write(mddev_t *mddev)
 	} else
 		spin_unlock_irq(&mddev->write_lock);
 
-	if (test_bit(MD_CHANGE_CLEAN, &mddev->flags))
+	if (test_bit(MD_CHANGE_PENDING, &mddev->flags))
 		return -EAGAIN;
 	else
 		return 0;
@@ -6823,8 +6820,7 @@ void md_do_sync(mddev_t *mddev)
 				   atomic_read(&mddev->recovery_active) == 0);
 			mddev->curr_resync_completed =
 				mddev->curr_resync;
-			if (mddev->persistent)
-				set_bit(MD_CHANGE_CLEAN, &mddev->flags);
+			set_bit(MD_CHANGE_CLEAN, &mddev->flags);
 			sysfs_notify(&mddev->kobj, NULL, "sync_completed");
 		}
 
@@ -7103,8 +7099,7 @@ void md_check_recovery(mddev_t *mddev)
 			    mddev->recovery_cp == MaxSector) {
 				mddev->in_sync = 1;
 				did_change = 1;
-				if (mddev->persistent)
-					set_bit(MD_CHANGE_CLEAN, &mddev->flags);
+				set_bit(MD_CHANGE_CLEAN, &mddev->flags);
 			}
 			if (mddev->safemode == 1)
 				mddev->safemode = 0;

drivers/md/md.h

@@ -140,7 +140,7 @@ struct mddev_s
 	unsigned long			flags;
 #define MD_CHANGE_DEVS	0	/* Some device status has changed */
 #define MD_CHANGE_CLEAN 1	/* transition to or from 'clean' */
-#define MD_CHANGE_PENDING 2	/* superblock update in progress */
+#define MD_CHANGE_PENDING 2	/* switch from 'clean' to 'active' in progress */
 
 	int				suspended;
 	atomic_t			active_io;

lib/raid6/.gitignore

@@ -0,0 +1,4 @@
+mktables
+altivec*.c
+int*.c
+tables.c