1 files changed, 49 insertions, 0 deletions
diff --git a/include/linux/range.h b/include/linux/range.h
new file mode 100644
index 000000000..d7f98e128
--- /dev/null
+++ b/include/linux/range.h
@@ -0,0 +1,49 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _LINUX_RANGE_H
+#define _LINUX_RANGE_H
+#include <linux/types.h>
+
+struct range {
+	u64   start;
+	u64   end;
+};
+
+static inline u64 range_len(const struct range *range)
+{
+	return range->end - range->start + 1;
+}
+
+/* True if r1 completely contains r2 */
+static inline bool range_contains(const struct range *r1,
+				  const struct range *r2)
+{
+	return r1->start <= r2->start && r1->end >= r2->end;
+}
+
+/* True if any part of r1 overlaps r2 */
+static inline bool range_overlaps(const struct range *r1,
+				  const struct range *r2)
+{
+	return r1->start <= r2->end && r1->end >= r2->start;
+}
+
+int add_range(struct range *range, int az, int nr_range,
+		u64 start, u64 end);
+
+
+int add_range_with_merge(struct range *range, int az, int nr_range,
+				u64 start, u64 end);
+
+void subtract_range(struct range *range, int az, u64 start, u64 end);
+
+int clean_sort_range(struct range *range, int az);
+
+void sort_range(struct range *range, int nr_range);
+
+#define DEFINE_RANGE(_start, _end)		\
+(struct range) {				\
+		.start = (_start),		\
+		.end = (_end),			\
+	}
+
+#endif