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

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Message-ID: <20220715080412.j3wgvzlv5evp5zbb@pali>
Date:   Fri, 15 Jul 2022 10:04:12 +0200
From:   Pali Rohár <pali@...nel.org>
To:     Bjorn Helgaas <helgaas@...nel.org>
Cc:     kernel test robot <lkp@...el.com>, kbuild-all@...ts.01.org,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Russell King <linux@...linux.org.uk>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-pci@...r.kernel.org
Subject: Re: [PATCH] arm: ioremap: Fix compilation of code which use
 pci_remap_iospace() without CONFIG_MMU

On Thursday 14 July 2022 15:04:43 Bjorn Helgaas wrote:
> [+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.

https://lore.kernel.org/r/20211205123209.lyx76daqdwzqwex4@pali/

> 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@...el.com>
> > Signed-off-by: Pali Rohár <pali@...nel.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
> > 
> > 
> > _______________________________________________
> > linux-arm-kernel mailing list
> > linux-arm-kernel@...ts.infradead.org
> > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

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