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PCI: Add arch_can_pci_mmap_io() on architectures which can mmap() I/O space

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This is relatively esoteric, and knowing that we don't have it makes life
easier in some cases rather than just an eventual -EINVAL from
pci_mmap_page_range().

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
David Woodhouse
2017-04-12 13:25:56 +01:00
committed by Bjorn Helgaas
parent 11df19546f
commit e854d8b2a8
8 changed files with 26 additions and 12 deletions
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arch/sparc/include/asm/pci_64.h
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@@ -42,6 +42,7 @@ static inline int pci_proc_domain(struct pci_bus *bus)
/* Platform support for /proc/bus/pci/X/Y mmap()s. */
#define HAVE_PCI_MMAP
#define arch_can_pci_mmap_io() 1
#define HAVE_ARCH_PCI_GET_UNMAPPED_AREA
#define get_pci_unmapped_area get_fb_unmapped_area