Instead of setting AOP_FLAG_NOFS, use memalloc_nofs_save() and
memalloc_nofs_restore() to prevent GFP_FS allocations recursing
into the filesystem with a journal already started.
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: NTheodore Ts'o <tytso@mit.edu>