Re: [RFC PATCH 1/2] asm-generic: Remove pci.h copying code out to architectures

[Max Filippov]

On Thu, Jul 14, 2022 at 2:47 PM Stafford Horne <shorne@xxxxxxxxx> wrote:
>
> The generic pci.h header provides a definition of pci_get_legacy_ide_irq
> which is used by architectures that use PC-style interrupt numbers.
>
> This patch removes the old pci.h in order to make room for a new
> pci.h to be used by arm64, riscv, openrisc, etc.
>
> The existing code in pci.h is moved out to architectures.
>
> Suggested-by: Arnd Bergmann <arnd@xxxxxxxx>
> Link: https://lore.kernel.org/lkml/CAK8P3a0JmPeczfmMBE__vn=Jbvf=nkbpVaZCycyv40pZNCJJXQ@xxxxxxxxxxxxxx/
> Signed-off-by: Stafford Horne <shorne@xxxxxxxxx>
> ---
>  arch/alpha/include/asm/pci.h   |  1 -
>  arch/ia64/include/asm/pci.h    |  1 -
>  arch/m68k/include/asm/pci.h    |  7 +++++--
>  arch/powerpc/include/asm/pci.h |  1 -
>  arch/s390/include/asm/pci.h    |  6 +++++-
>  arch/sparc/include/asm/pci.h   |  5 ++++-
>  arch/x86/include/asm/pci.h     |  6 ++++--
>  arch/xtensa/include/asm/pci.h  |  6 ++++--
>  include/asm-generic/pci.h      | 17 -----------------
>  9 files changed, 22 insertions(+), 28 deletions(-)
>  delete mode 100644 include/asm-generic/pci.h

[...]

> diff --git a/arch/xtensa/include/asm/pci.h b/arch/xtensa/include/asm/pci.h
> index 8e2b48a268db..f57ede61f5db 100644
> --- a/arch/xtensa/include/asm/pci.h
> +++ b/arch/xtensa/include/asm/pci.h
> @@ -43,7 +43,9 @@
>  #define ARCH_GENERIC_PCI_MMAP_RESOURCE 1
>  #define arch_can_pci_mmap_io()         1
>
> -/* Generic PCI */
> -#include <asm-generic/pci.h>

Ok.

> +static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
> +{
> +       return channel ? 15 : 14;
> +}

This addition does not make sense for the xtensa as it isn't even possible
to enable PNP support (the only user of this function) on xtensa.

-- 
Thanks.
-- Max