bcachefs: Use BTREE_INSERT_USE_RESERVE in btree_update_key()

bch2_btree_update_key() is used in the btree node write path - before
delivering the completion we have to update the parent pointer with the
number of sectors written.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
This commit is contained in:
Kent Overstreet 2022-01-08 03:39:54 -05:00 • committed by Kent Overstreet
commit b674bfadd8