md: use sysfs_notify_dirent to notify changes to md/array_state

Now that we have sysfs_notify_dirent, use it to notify changes
to md/array_state.
As sysfs_notify_dirent can be called in atomic context, we can
remove the delayed notify and the MD_NOTIFY_ARRAY_STATE flag.

Signed-off-by: NeilBrown <neilb@suse.de>

1 files changed, 4 insertions, 1 deletions

diff --git a/include/linux/raid/md_k.h b/include/linux/raid/md_k.h
index c200b9a34aff..b16ad867e944 100644
--- a/include/linux/raid/md_k.h
+++ b/include/linux/raid/md_k.h
@@ -128,7 +128,6 @@ struct mddev_s
 #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_NOTIFY_ARRAY_STATE 3 /* atomic context wants to notify userspace */
 
         int                             ro;
 
@@ -239,6 +238,10 @@ struct mddev_s
         sector_t                        resync_max;     /* resync should pause
                                                          * when it gets here */
 
+        struct sysfs_dirent             *sysfs_state;   /* handle for 'array_state'
+                                                         * file in sysfs.
+                                                         */
+
         spinlock_t                      write_lock;
         wait_queue_head_t               sb_wait;        /* for waiting on superblock updates */
         atomic_t                        pending_writes; /* number of active superblock writes */