block: Remove useless IPI struct initialization

rq_fifo_clear() reset the csd.list through INIT_LIST_HEAD for no clear
purpose. The csd.list doesn't need to be initialized as a list head
because it's only ever used as a list node.

Lets remove this useless initialization.

Reviewed-by: Jan Kara <jack@suse.cz>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jan Kara <jack@suse.cz>
Cc: Jens Axboe <axboe@fb.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

diff --git a/include/linux/elevator.h b/include/linux/elevator.h
index 0bdfd46..df63bd3 100644 (file)
--- a/include/linux/elevator.h
+++ b/include/linux/elevator.h
@@ -203,10 +203,7 @@ enum {
 #define rb_entry_rq(node)      rb_entry((node), struct request, rb_node)
 
 #define rq_entry_fifo(ptr)     list_entry((ptr), struct request, queuelist)
-#define rq_fifo_clear(rq)      do {            \
-       list_del_init(&(rq)->queuelist);        \
-       INIT_LIST_HEAD(&(rq)->csd.list);        \
-       } while (0)
+#define rq_fifo_clear(rq)      list_del_init(&(rq)->queuelist)
 
 #else /* CONFIG_BLOCK */