[PATCH v2 13/15] vsock/virtio: reorder fields to reduce padding

Michael S. Tsirkin
2026-01-05T08:23:50Z

Reorder struct virtio_vsock fields to place the DMA buffer (event_list)
last. This eliminates the padding from aligning the struct size on
ARCH_DMA_MINALIGN.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
net/vmw_vsock/virtio_transport.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/net/vmw_vsock/virtio_transport.c b/net/vmw_vsock/virtio_transport.c
index ef983c36cb66..964d25e11858 100644
--- a/net/vmw_vsock/virtio_transport.c
+++ b/net/vmw_vsock/virtio_transport.c
@@ -60,9 +60,7 @@ struct virtio_vsock {
*/
struct mutex event_lock;
bool event_run;
- __dma_from_device_group_begin();
- struct virtio_vsock_event event_list[8];
- __dma_from_device_group_end();
+
u32 guest_cid;
bool seqpacket_allow;

@@ -76,6 +74,10 @@ struct virtio_vsock {
*/
struct scatterlist *out_sgs[MAX_SKB_FRAGS + 1];
struct scatterlist out_bufs[MAX_SKB_FRAGS + 1];
+
+ __dma_from_device_group_begin();
+ struct virtio_vsock_event event_list[8];
+ __dma_from_device_group_end();
};

static u32 virtio_transport_get_local_cid(void)
--
MST