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    x86/dma: unify definition of pci_unmap_addr* and pci_unmap_len macros · 67796bf7
    Joerg Roedel 提交于
    Impact: unification of pci-dma macros and pci_32.h removal
    
    This patch unifies the definition of the pci_unmap_addr*, pci_unmap_len*
    and DECLARE_PCI_UNMAP* macros. This makes sense because the pci_unmap
    functions are no longer no-ops anymore when the kernel runs with
    CONFIG_DMA_API_DEBUG. Without an iommu or DMA_API_DEBUG it is a no-op on 32 bit
    because the dma mapping path returns a physical address and therefore the
    dma-api implementation has no internal state which needs to be destroyed with
    an unmap call.
    This unification also simplifies the port of x86_64 iommu drivers to 32 bit x86
    and let us get rid of pci_32.h.
    Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>
    Acked-by: NStephen Hemminger <shemminger@vyatta.com>
    67796bf7
pci.h 4.1 KB