On Wed, Jul 21, 2021 at 5:15 PM Arnd Bergmann <arnd@xxxxxxxxxx> wrote:
> From: Arnd Bergmann <arnd@xxxxxxxx>
>
> When both the old and the new PCI drivers are enabled
> in the same kernel, there are a couple of namespace
> conflicts that cause a build failure:
>
> drivers/pci/controller/pci-ixp4xx.c:38: error: "IXP4XX_PCI_CSR" redefined [-Werror]
> 38 | #define IXP4XX_PCI_CSR 0x1c
> |
> In file included from arch/arm/mach-ixp4xx/include/mach/hardware.h:23,
> from arch/arm/mach-ixp4xx/include/mach/io.h:15,
> from arch/arm/include/asm/io.h:198,
> from include/linux/io.h:13,
> from drivers/pci/controller/pci-ixp4xx.c:20:
> arch/arm/mach-ixp4xx/include/mach/ixp4xx-regs.h:221: note: this is the location of the previous definition
> 221 | #define IXP4XX_PCI_CSR(x) ((volatile u32 *)(IXP4XX_PCI_CFG_BASE_VIRT+(x)))
> |
> drivers/pci/controller/pci-ixp4xx.c:148:12: error: 'ixp4xx_pci_read' redeclared as different kind of symbol
> 148 | static int ixp4xx_pci_read(struct ixp4xx_pci *p, u32 addr, u32 cmd, u32 *data)
> | ^~~~~~~~~~~~~~~
>
> Rename both the ixp4xx_pci_read/ixp4xx_pci_write functions and the
> IXP4XX_PCI_CSR macro. In each case, I went with the version that
> has fewer callers to keep the change small.
>
> Fixes: f7821b493458 ("PCI: ixp4xx: Add a new driver for IXP4xx")
> Cc: soc@xxxxxxxxxx
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
I tried very hard to make it impossible to build both drivers at the
same time :(
Oh well I guess I failed. Kconfig ... say no more.
Reviewed-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Yours,
Linus Walleij
