fs: factor out backing_file_splice_{read,write}() helpers

There is not much in those helpers, but it makes sense to have them
logically next to the backing_file_{read,write}_iter() helpers as they
may grow more common logic in the future.

Signed-off-by: Amir Goldstein <amir73il@gmail.com>
This commit is contained in:
Amir Goldstein 2023-10-13 12:13:12 +03:00
commit 9b7e9e2f5d
3 changed files with 72 additions and 20 deletions