Messages in this thread Patch in this message | | | From | Yinghai Lu <> | Subject | [PATCH 02/24] PCI: add busn inline helper | Date | Sat, 4 Feb 2012 22:57:46 -0800 |
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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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