rbd: use kmem_cache_zalloc() in rbd_img_request_create()

Web:        https://git.kernel.org/torvalds/c/a0c5895b27f6bbf8aa20a2c640845fc261740051
Commit:     a0c5895b27f6bbf8aa20a2c640845fc261740051
Parent:     2e584bce706a42a5dd86e9ac9f39900a20ba5175
Refname:    refs/heads/master
Author:     Ilya Dryomov <[email protected]>
AuthorDate: Mon Jan 22 16:03:06 2018 +0100
Committer:  Ilya Dryomov <[email protected]>
CommitDate: Mon Jan 29 15:23:01 2018 +0100

    rbd: use kmem_cache_zalloc() in rbd_img_request_create()
    
    Signed-off-by: Ilya Dryomov <[email protected]>
---
 drivers/block/rbd.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 89d00038b7ce..7646a2d3119c 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -2124,15 +2124,13 @@ static struct rbd_img_request *rbd_img_request_create(
 {
 	struct rbd_img_request *img_request;
 
-	img_request = kmem_cache_alloc(rbd_img_request_cache, GFP_NOIO);
+	img_request = kmem_cache_zalloc(rbd_img_request_cache, GFP_NOIO);
 	if (!img_request)
 		return NULL;
 
-	img_request->rq = NULL;
 	img_request->rbd_dev = rbd_dev;
 	img_request->offset = offset;
 	img_request->length = length;
-	img_request->flags = 0;
 	if (op_type == OBJ_OP_DISCARD) {
 		img_request_discard_set(img_request);
 		img_request->snapc = snapc;
@@ -2144,11 +2142,8 @@ static struct rbd_img_request *rbd_img_request_create(
 	}
 	if (rbd_dev_parent_get(rbd_dev))
 		img_request_layered_set(img_request);
+
 	spin_lock_init(&img_request->completion_lock);
-	img_request->next_completion = 0;
-	img_request->callback = NULL;
-	img_request->result = 0;
-	img_request->obj_request_count = 0;
 	INIT_LIST_HEAD(&img_request->obj_requests);
 	kref_init(&img_request->kref);
 
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