[$] The file_operations structure gets smaller

Kernel developers are encouraged to send their changes in small batches as
a way of making life easier for reviewers. So when a longtime developer
and maintainer hits the list with a 437-patch series touching 859 files,
eyebrows are certain to head skyward. Specifically, this series
from Jens Axboe is cleaning up one of the core abstractions that has
been part of the Linux kernel almost since the beginning; authors of device
drivers (among others) will have to take note.