bcachefs: Use attach_page_private and detach_page_private

These recently added helpers simplify the code.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Matthew Wilcox (Oracle) 2020-11-05 15:58:38 +00:00 • committed by Kent Overstreet
commit 00276f9f34