| commit | f97fcad38f2ecf2e34b6f0ab93f74f2978dbe008 | [log] [tgz] |
|---|---|---|
| author | NeilBrown <neilb@suse.de> | Mon Dec 15 12:56:59 2014 +1100 |
| committer | NeilBrown <neilb@suse.de> | Fri Feb 06 09:32:55 2015 +1100 |
| tree | bff93531bc4bf444adf29337202b4814359d8a61 | |
| parent | 978a7a47cae79ae7a7b5a1e80bfcaef6ee700312 [diff] |
md: remove need for mddev_lock() in md_seq_show() The only access in md_seq_show that could suffer from races not protected by ->lock is walking the rdev list. This can receive sufficient protection from 'rcu'. So use rdev_for_each_rcu() and get rid of mddev_lock(). Now reading /proc/mdstat will never block in md_seq_show. Signed-off-by: NeilBrown <neilb@suse.de>