[PATCH] arm: ioremap: Fix compilation of code which use pci_remap_iospace() without CONFIG_MMU

[Bjorn Helgaas]

[+cc linux-pci, update Lorenzo's email addr]

Hi Pali,

Thanks for cc'ing me.  I think your previous notes didn't include
linux-pci or me, so I missed them.

It looks like bc02973a06a6 was merged via the PCI tree for v5.17 [1],
so we should probably merge the fix the same way.

Russell, let me know if you object.  Otherwise, I put it on pci/misc
for v5.20.

[1] https://lore.kernel.org/r/20220114155608.GA557997@bhelgaas

On Thu, Jul 14, 2022 at 08:57:00PM +0200, Pali Rohár wrote:
> Custom ARM version of pci_remap_iospace() is implemented only for MMU
> kernel builds. So do not define pci_remap_iospace() without CONFIG_MMU.
>
> See compilation failures:
> https://lore.kernel.org/r/202112040150.wvyJZIZO-lkp@intel.com/
> https://lore.kernel.org/r/202112261802.u9iXqdWh-lkp@intel.com/
> https://lore.kernel.org/r/202201131529.A2s7rKQc-lkp@intel.com/
> https://lore.kernel.org/r/202203090147.24cUL0De-lkp@intel.com/
> 
> Fixes: bc02973a06a6 ("arm: ioremap: Implement standard PCI function pci_remap_iospace()")
> Reported-by: kernel test robot <lkp at intel.com>
> Signed-off-by: Pali Rohár <pali at kernel.org>
> 
> ---
> 
> PING!!!! Is somebody interested in fixing these compile errors? As nobody
> answered to my emails where I proposed this fix more than half year ago and
> asked for opinion...
> 
> https://lore.kernel.org/r/20211204022131.bmhla4gkph7s7hy2@pali/
> https://lore.kernel.org/r/20211205123209.lyx76daqdwzqwex4@pali/
> https://lore.kernel.org/r/20211226215135.blcnafbuwhrq5ram@pali/
> https://lore.kernel.org/r/20220113134938.3tx7iiukphvazvsq@pali/
> https://lore.kernel.org/r/20220308184851.jmw2xvrapy5wzwof@pali/
> 
> If nobody is interested then please STOP sending me these Intel "0-DAY CI
> Kernel Test Service" emails. Thanks!
> ---
>  arch/arm/include/asm/io.h | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/arch/arm/include/asm/io.h b/arch/arm/include/asm/io.h
> index eba7cbc93b86..47cf79229b7c 100644
> --- a/arch/arm/include/asm/io.h
> +++ b/arch/arm/include/asm/io.h
> @@ -180,10 +180,12 @@ void pci_ioremap_set_mem_type(int mem_type);
>  static inline void pci_ioremap_set_mem_type(int mem_type) {}
>  #endif
>  
> +#ifdef CONFIG_MMU
>  struct resource;
>  
>  #define pci_remap_iospace pci_remap_iospace
>  int pci_remap_iospace(const struct resource *res, phys_addr_t phys_addr);
> +#endif
>  
>  /*
>   * PCI configuration space mapping function.
> -- 
> 2.20.1
> 
> 
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