tree 3faa24718c098f19b7e331eae0ba29f145e902da
parent 5e96ee65c8bd629ce093da67a066d3946468298a
author Neil Brown <neilb@notabene.brown> 1214605886 +1000
committer Neil Brown <neilb@notabene.brown> 1214605886 +1000

Close race in md_probe

There is a possible race in md_probe.  If two threads call md_probe
for the same device, then one could exit (having checked that
->gendisk exists) before the other has called kobject_init_and_add,
thus returning an incomplete kobj which will cause problems when
we try to add children to it.

So extend the range of protection of disks_mutex slightly to
avoid this possibility.

Signed-off-by: Neil Brown <neilb@suse.de>