gpio: virtio: reorder fields to reduce struct padding
Reorder struct virtio_gpio_line fields to place the DMA buffers (req/res)
last. This eliminates the need for __dma_from_device_aligned_end padding
after the DMA buffer, since struct tail padding naturally protects it,
making the struct a bit smaller.
Size reduction estimation when ARCH_DMA_MINALIGN=128:
- request is 8 bytes
- response is 2 bytes
- removing _end saves up to 128-6=122 bytes padding to align rxlen field
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
1 file changed
