zfsonlinux/zfs — pull request #2277 by tuxoko (2014-04-24 03:17:11+00:00)
Title: Add assertion to catch 0-count page

Some network related block device uses tcp_sendpage, which doesn't behave well
when using 0-count page. Add assertion to catch them.

This has a runtime dependency on spl:
Fix crash when using ZFS on Ceph rbd

Signed-off-by: Chunwei Chen