diff options
| author | NeilBrown <[email protected]> | 2014-12-15 12:56:59 +1100 |
|---|---|---|
| committer | NeilBrown <[email protected]> | 2015-02-06 09:32:55 +1100 |
| commit | f97fcad38f2ecf2e34b6f0ab93f74f2978dbe008 (patch) | |
| tree | bff93531bc4bf444adf29337202b4814359d8a61 /tools/perf/util/scripting-engines/trace-event-perl.c | |
| 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 <[email protected]>
Diffstat (limited to 'tools/perf/util/scripting-engines/trace-event-perl.c')
0 files changed, 0 insertions, 0 deletions