Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

arch: fix ioport mapping on mips,sh

Kevin Cernekee reported that recent cleanup that replaced pci_iomap with
a generic function failed to take into account the differences in io
port handling on mips and sh architectures.

Rather than revert the changes reintroducing the code duplication, this
patchset fixes this by adding ability for architectures to override
ioport mapping for pci devices.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
  sh: use the the PCI channels's io_map_base
  mips: use the the PCI controller's io_map_base
  lib: add NO_GENERIC_PCI_IOPORT_MAP

include/asm-generic/pci_iomap.h

@@ -15,6 +15,16 @@ struct pci_dev;
 #ifdef CONFIG_PCI
 /* Create a virtual mapping cookie for a PCI BAR (memory or IO) */
 extern void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max);
+/* Create a virtual mapping cookie for a port on a given PCI device.
+ * Do not call this directly, it exists to make it easier for architectures
+ * to override */
+#ifdef CONFIG_NO_GENERIC_PCI_IOPORT_MAP
+extern void __iomem *__pci_ioport_map(struct pci_dev *dev, unsigned long port,
+				      unsigned int nr);
+#else
+#define __pci_ioport_map(dev, port, nr) ioport_map((port), (nr))
+#endif
+
 #else
 static inline void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max)
 {