bcachefs: Use memalloc_nofs_save()

vmalloc allocations don't always obey GFP_NOFS - memalloc_nofs_save() is
the prefered approach for the future.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2020-03-27 17:38:51 -04:00 • committed by Kent Overstreet
commit 4e4758c6cb