diff options
Diffstat (limited to 'include/linux/ioport.h')
| -rw-r--r-- | include/linux/ioport.h | 16 |
1 files changed, 16 insertions, 0 deletions
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) |