afs: Get rid of the afs_writeback record
Get rid of the afs_writeback record that kAFS is using to match keys with
writes made by that key.
Instead, keep a list of keys that have a file open for writing and/or
sync'ing and iterate through those.
Signed-off-by: David Howells <dhowells@redhat.com>
diff --git a/mm/filemap.c b/mm/filemap.c
index 594d73f..5bcc87a 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1041,6 +1041,7 @@ int wait_on_page_bit_killable(struct page *page, int bit_nr)
wait_queue_head_t *q = page_waitqueue(page);
return wait_on_page_bit_common(q, page, bit_nr, TASK_KILLABLE, false);
}
+EXPORT_SYMBOL(wait_on_page_bit_killable);
/**
* add_page_wait_queue - Add an arbitrary waiter to a page's wait queue
