[PATCH 02/24] PCI: add busn inline helper
From: Yinghai Lu <yinghai@kernel.org>
Date: 2012-02-05 06:59:04
Also in:
linux-pci, lkml
Subsystem:
the rest · Maintainer:
Linus Torvalds
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