| Message ID | 20210116152711.23411-1-alobakin@pm.me |
|---|---|
| State | New |
| Headers | show |
| Series | [pci-next] PCI: dwc: put struct dw_pcie::{ep,pp} into a union to reduce its size | expand |
diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h index 5d979953800d..924ebeaa3885 100644 --- a/drivers/pci/controller/dwc/pcie-designware.h +++ b/drivers/pci/controller/dwc/pcie-designware.h @@ -265,8 +265,10 @@ struct dw_pcie { size_t atu_size; u32 num_ib_windows; u32 num_ob_windows; - struct pcie_port pp; - struct dw_pcie_ep ep; + union { + struct pcie_port pp; + struct dw_pcie_ep ep; + }; const struct dw_pcie_ops *ops; unsigned int version; int num_lanes;
A single dw_pcie entity can't be a root complex and an endpoint at the same time. We can use this to reduce the size of dw_pcie by 80, from 280 to 200 bytes (on x32, guess more on x64), by putting the related embedded structures (struct pcie_port and struct dw_pcie_ep) into a union. Signed-off-by: Alexander Lobakin <alobakin@pm.me> --- drivers/pci/controller/dwc/pcie-designware.h | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)