loop: fix bad bio_alloc() nr_iovec request

Don't allocate room for an iovec when it is not needed.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 56e23042728ae093776a86a499da310511d51a91..b8af22e610dfe4f90ac1b637f0670ec5f9e6bfee 100644 (file)
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -610,7 +610,7 @@ static int loop_thread(void *data)
 static int loop_switch(struct loop_device *lo, struct file *file)
 {
        struct switch_request w;
-       struct bio *bio = bio_alloc(GFP_KERNEL, 1);
+       struct bio *bio = bio_alloc(GFP_KERNEL, 0);
        if (!bio)
                return -ENOMEM;
        init_completion(&w.wait);