exofs: Optimize read_4_write

Don't attempt a read passed i_size, just zero the page and be
done with it.

Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
This commit is contained in:
Boaz Harrosh 2010-11-22 18:02:45 +02:00
commit a8f1418f9e