linux-kernel - Re: [PATCH 4/6] PCI: allow architecture specific implementation of pci_remap

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Date:   Fri, 24 Sep 2021 21:42:04 -0500
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Sergio Paracuellos <sergio.paracuellos@...il.com>
Cc:     tsbogend@...ha.franken.de, robh@...nel.org, arnd@...db.de,
        catalin.marinas@....com, Liviu.Dudau@....com, bhelgaas@...gle.com,
        matthias.bgg@...il.com, gregkh@...uxfoundation.org,
        linux-mips@...r.kernel.org, linux-pci@...r.kernel.org,
        linux-staging@...ts.linux.dev, neil@...wn.name,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/6] PCI: allow architecture specific implementation of
 pci_remap_iospace()

s/PCI: allow architecture specific implementation of/
  PCI: Allow architecture-specific pci_remap_iospace()/

(in subject)

On Fri, Sep 24, 2021 at 11:11:37PM +0200, Sergio Paracuellos wrote:
> pci_remap_iospace() was originally meant as an architecture specific helper,
> but it moved into generic code after all architectures had the same requirements.
> MIPS has different requirements so it should not be shared. The way for doing
> this will be using a macro 'pci_remap_iospace' defined for those architectures
> that need a special treatement. Hence, put core api function inside preprocesor
> conditional code for 'pci_remap_iospace' definition.

Rewrap above to fit in 75 columns so "git log" output doesn't wrap.
Add blank line between paragraphs.

s/treatement/treatment/
s/api/API/

> Signed-off-by: Sergio Paracuellos <sergio.paracuellos@...il.com>

With above fixed,

Acked-by: Bjorn Helgaas <bhelgaas@...gle.com>

> ---
>  drivers/pci/pci.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
> index ce2ab62b64cf..0ec57bb01a88 100644
> --- a/drivers/pci/pci.c
> +++ b/drivers/pci/pci.c
> @@ -4123,6 +4123,7 @@ unsigned long __weak pci_address_to_pio(phys_addr_t address)
>   * architectures that have memory mapped IO functions defined (and the
>   * PCI_IOBASE value defined) should call this function.
>   */
> +#ifndef pci_remap_iospace
>  int pci_remap_iospace(const struct resource *res, phys_addr_t phys_addr)
>  {
>  #if defined(PCI_IOBASE) && defined(CONFIG_MMU)
> @@ -4146,6 +4147,7 @@ int pci_remap_iospace(const struct resource *res, phys_addr_t phys_addr)
>  #endif
>  }
>  EXPORT_SYMBOL(pci_remap_iospace);
> +#endif
>  
>  /**
>   * pci_unmap_iospace - Unmap the memory mapped I/O space
> -- 
> 2.25.1
>