bcachefs: Fix page state after fallocate

This tweaks the fallocate code to also update the page cache to reflect
the new on disk reservations, giving us better i_sectors consistency.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
This commit is contained in:
Kent Overstreet 2021-11-23 18:21:09 -05:00 • committed by Kent Overstreet
commit dcfc593f7b