diff options
| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2020-11-03 22:45:07 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2020-11-17 18:06:28 +0100 |
| commit | f65674df1b23cdcb6f656a14f659ffea83e7acaa (patch) | |
| tree | 9770430d7c42d179b937b690dc96d8677bdcb2b4 /include/linux/ioport.h | |
| parent | 5562f35d7feabfd68cd58a1ee28b451f90e82417 (diff) | |
resource: Introduce resource_intersection() for overlapping resources
There will be at least one user that can utilize new helper.
Provide the helper for future user and for wider use.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Hanjun Guo <guohanjun@huawei.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'include/linux/ioport.h')
| -rw-r--r-- | include/linux/ioport.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/ioport.h b/include/linux/ioport.h index 40320eb5bc0e..ece1a8db309c 100644 --- a/include/linux/ioport.h +++ b/include/linux/ioport.h @@ -237,6 +237,16 @@ static inline bool resource_overlaps(struct resource *r1, struct resource *r2) } static inline bool +resource_intersection(struct resource *r1, struct resource *r2, struct resource *r) +{ + if (!resource_overlaps(r1, r2)) + return false; + r->start = max(r1->start, r2->start); + r->end = min(r1->end, r2->end); + return true; +} + +static inline bool resource_union(struct resource *r1, struct resource *r2, struct resource *r) { if (!resource_overlaps(r1, r2)) |