convert back and forth with busn and domain_nr/bus_nr
Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
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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