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md: use sysfs_notify_dirent to notify changes to md/dev-xxx/state

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The 'state' file for a device reports, for example, when the device
has failed.  Changes should be reported to userspace ASAP without
the possibility of blocking on low-memory.  sysfs_notify does
have that possibility (as it takes a mutex which can be held
across a kmalloc) so use sysfs_notify_dirent instead.

Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
NeilBrown 2008-10-21 13:25:28 +11:00
parent b62b75905d
commit 3c0ee63a64
2 changed files with 15 additions and 9 deletions
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3
include/linux/raid/md_k.h
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@ -115,6 +115,9 @@ struct mdk_rdev_s
* in superblock.
*/
struct work_struct del_work; /* used for delayed sysfs removal */
struct sysfs_dirent *sysfs_state; /* handle for 'state'
* sysfs entry */
};
struct mddev_s