tree af7420005570b68cbe7810e58f1bd84078b9925f
parent 5f375835694426d00a7a4bc7fef72479578f279f
author Miao Xie <miaox@cn.fujitsu.com> 1409751347 +0800
committer Chris Mason <clm@fb.com> 1410986329 -0700

Btrfs: modify rw_devices counter under chunk_mutex context

rw_devices counter is often used to tune the profile when doing chunk allocation,
so we should modify it under the chunk_mutex context to avoid getting wrong
chunk profile.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>