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

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Message-Id: <20210924211139.3477-5-sergio.paracuellos@gmail.com>
Date:   Fri, 24 Sep 2021 23:11:37 +0200
From:   Sergio Paracuellos <sergio.paracuellos@...il.com>
To:     tsbogend@...ha.franken.de
Cc:     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: [PATCH 4/6] PCI: allow architecture specific implementation of pci_remap_iospace()

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.

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