Add resource_overlaps() and resource_contains() helpers.
Code copied from kernel source.
Signed-off-by: Patrice Chotard <patrice.chot...@foss.st.com>
---
include/linux/ioport.h | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/include/linux/ioport.h b/include/linux/ioport.h
index 85288c3729a..c12a7f70ad7 100644
--- a/include/linux/ioport.h
+++ b/include/linux/ioport.h
@@ -135,6 +135,22 @@ static inline unsigned long resource_type(const struct
resource *res)
return res->flags & IORESOURCE_TYPE_BITS;
}
+/* True iff r1 completely contains r2 */
+static inline bool resource_contains(struct resource *r1, struct resource *r2)
+{
+ if (resource_type(r1) != resource_type(r2))
+ return false;
+ if (r1->flags & IORESOURCE_UNSET || r2->flags & IORESOURCE_UNSET)
+ return false;
+ return r1->start <= r2->start && r1->end >= r2->end;
+}
+
+/* True if any part of r1 overlaps r2 */
+static inline bool resource_overlaps(struct resource *r1, struct resource *r2)
+{
+ return r1->start <= r2->end && r1->end >= r2->start;
+}
+
/* Convenience shorthand with allocation */
#define request_region(start,n,name) __request_region(&ioport_resource,
(start), (n), (name), 0)
#define __request_mem_region(start,n,name, excl)
__request_region(&iomem_resource, (start), (n), (name), excl)
--
2.25.1
