Btrfs: Checksum tree blocks in the background

Tree blocks were using async bio submission, but the sum was still
being done directly during writepage.  This moves the checksumming
into the worker thread.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2008-09-23 13:14:12 -04:00
commit ce3ed71a58