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    Subject[PATCH 02/24] PCI: add busn inline helper
    Date
    convert back and forth with busn and domain_nr/bus_nr

    Signed-off-by: Yinghai Lu <yinghai@kernel.org>
    Cc: Andrew Morton <akpm@linux-foundation.org>
    ---
    include/linux/ioport.h | 17 +++++++++++++++++
    1 files changed, 17 insertions(+), 0 deletions(-)

    diff --git a/include/linux/ioport.h b/include/linux/ioport.h
    index 6fe9e19..f80c0cc 100644
    --- a/include/linux/ioport.h
    +++ b/include/linux/ioport.h
    @@ -138,6 +138,23 @@ extern struct resource ioport_resource;
    extern struct resource iomem_resource;
    extern struct resource iobusn_resource;

    +static inline int busn_domain_nr(resource_size_t busn)
    +{
    + return busn >> 8;
    +}
    +static inline int busn_bus_nr(resource_size_t busn)
    +{
    + return busn & 0xff;
    +}
    +static inline resource_size_t busn_update_bus_nr(resource_size_t busn, int b_nr)
    +{
    + return (busn & ~0xff) | (b_nr & 0xff);
    +}
    +static inline resource_size_t busn(int d_nr, int b_nr)
    +{
    + return ((d_nr & 0xffff) << 8) | (b_nr & 0xff);
    +}
    +
    extern struct resource *request_resource_conflict(struct resource *root, struct resource *new);
    extern int request_resource(struct resource *root, struct resource *new);
    extern int release_resource(struct resource *new);
    --
    1.7.7


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