From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Date: Sat, 18 Feb 2023 08:10:31 +0000 (+0100)
Subject: virtio: Reorder fields in 'struct virtqueue'
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=48cd6bc5b22d68b8bbc8601f3c7ddeed99541a0b;p=linux.git

virtio: Reorder fields in 'struct virtqueue'

Group some variables based on their sizes to reduce hole and avoid padding.
On x86_64, this shrinks the size of 'struct virtqueue'
from 72 to 68 bytes.

It saves a few bytes of memory.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Message-Id: <8f3d2e49270a2158717e15008e7ed7228196ba02.1676707807.git.christophe.jaillet@wanadoo.fr>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Peter Lafreniere <peter@n8pjl.ca>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
---

diff --git a/include/linux/virtio.h b/include/linux/virtio.h
index 2b472514c49b0..d6e161aa532ed 100644
--- a/include/linux/virtio.h
+++ b/include/linux/virtio.h
@@ -34,8 +34,8 @@ struct virtqueue {
 	unsigned int index;
 	unsigned int num_free;
 	unsigned int num_max;
-	void *priv;
 	bool reset;
+	void *priv;
 };
 
 int virtqueue_add_outbuf(struct virtqueue *vq,