block: move existing elevator ops to union
Prep patch for adding MQ ops as well, since doing anon unions with
named initializers doesn't work on older compilers.
Signed-off-by: Jens Axboe <axboe@fb.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Omar Sandoval <osandov@fb.com>
diff --git a/include/linux/elevator.h b/include/linux/elevator.h
index b276e9e..2a9e966 100644
--- a/include/linux/elevator.h
+++ b/include/linux/elevator.h
@@ -94,7 +94,9 @@
struct kmem_cache *icq_cache;
/* fields provided by elevator implementation */
- struct elevator_ops ops;
+ union {
+ struct elevator_ops sq;
+ } ops;
size_t icq_size; /* see iocontext.h */
size_t icq_align; /* ditto */
struct elv_fs_entry *elevator_attrs;