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| author | NeilBrown <neilb@suse.de> | 2014-12-15 04:56:59 +0300 |
|---|---|---|
| committer | NeilBrown <neilb@suse.de> | 2015-02-06 01:32:55 +0300 |
| commit | f97fcad38f2ecf2e34b6f0ab93f74f2978dbe008 (patch) | |
| tree | bff93531bc4bf444adf29337202b4814359d8a61 /drivers/md/raid5.c | |
| parent | 978a7a47cae79ae7a7b5a1e80bfcaef6ee700312 (diff) | |
| download | linux-f97fcad38f2ecf2e34b6f0ab93f74f2978dbe008.tar.xz | |
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>
Diffstat (limited to 'drivers/md/raid5.c')
0 files changed, 0 insertions, 0 deletions