Make sure all changes to md/dev-XX/state are notified
The important state change happens during an interrupt
in md_error. So just set a flag there and call sysfs_notify
later in process context.
Signed-off-by: Neil Brown <neilb@suse.de>
diff --git a/include/linux/raid/md_k.h b/include/linux/raid/md_k.h
index 62aa9c9..df30c43 100644
--- a/include/linux/raid/md_k.h
+++ b/include/linux/raid/md_k.h
@@ -87,6 +87,9 @@
#define Blocked 8 /* An error occured on an externally
* managed array, don't allow writes
* until it is cleared */
+#define StateChanged 9 /* Faulty or Blocked has changed during
+ * interrupt, so it needs to be
+ * notified by the thread */
wait_queue_head_t blocked_wait;
int desc_nr; /* descriptor index in the superblock */