[PATCH v2 15/15] gpio: virtio: reorder fields to reduce struct padding

Michael S. Tsirkin
2026-01-05T08:23:58Z

Reorder struct virtio_gpio_line fields to place the DMA buffers
(req/res) last.

This eliminates the padding from aligning struct size on
ARCH_DMA_MINALIGN.

Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
drivers/gpio/gpio-virtio.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpio/gpio-virtio.c b/drivers/gpio/gpio-virtio.c
index b70294626770..ed6e0e90fa8a 100644
--- a/drivers/gpio/gpio-virtio.c
+++ b/drivers/gpio/gpio-virtio.c
@@ -26,11 +26,12 @@ struct virtio_gpio_line {
struct mutex lock; /* Protects line operation */
struct completion completion;

+ unsigned int rxlen;
+
__dma_from_device_group_begin();
struct virtio_gpio_request req;
struct virtio_gpio_response res;
__dma_from_device_group_end();
- unsigned int rxlen;
};

struct vgpio_irq_line {
--
MST