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md: use sysfs_notify_dirent to notify changes to md/array_state

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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>
This commit is contained in:
NeilBrown
2008-10-21 13:25:21 +11:00
parent 0cfd81031a
commit b62b75905d
2 changed files with 20 additions and 15 deletions
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5
include/linux/raid/md_k.h
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@ -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 */