This new helper will merge two rangesets.
Signed-off-by: Roger Pau Monné <roger....@citrix.com>
---
Cc: Andrew Cooper <andrew.coop...@citrix.com>
Cc: George Dunlap <george.dun...@eu.citrix.com>
Cc: Ian Jackson <ian.jack...@eu.citrix.com>
Cc: Jan Beulich <jbeul...@suse.com>
Cc: Julien Grall <julien.gr...@arm.com>
Cc: Konrad Rzeszutek Wilk <konrad.w...@oracle.com>
Cc: Stefano Stabellini <sstabell...@kernel.org>
Cc: Tim Deegan <t...@xen.org>
Cc: Wei Liu <wei.l...@citrix.com>
---
xen/common/rangeset.c | 12 ++++++++++++
xen/include/xen/rangeset.h | 3 +++
2 files changed, 15 insertions(+)
diff --git a/xen/common/rangeset.c b/xen/common/rangeset.c
index bb68ce62e4..195347669e 100644
--- a/xen/common/rangeset.c
+++ b/xen/common/rangeset.c
@@ -378,6 +378,18 @@ int rangeset_consume_ranges(struct rangeset *r,
return rc;
}
+static int merge(unsigned long s, unsigned long e, void *data)
+{
+ struct rangeset *r = data;
+
+ return rangeset_add_range(r, s, e);
+}
+
+int rangeset_merge(struct rangeset *r1, struct rangeset *r2)
+{
+ return rangeset_report_ranges(r2, 0, ~0ul, merge, r1);
+}
+
int rangeset_add_singleton(
struct rangeset *r, unsigned long s)
{
diff --git a/xen/include/xen/rangeset.h b/xen/include/xen/rangeset.h
index 583b72bb0c..0c05c2fd4e 100644
--- a/xen/include/xen/rangeset.h
+++ b/xen/include/xen/rangeset.h
@@ -80,6 +80,9 @@ int rangeset_consume_ranges(struct rangeset *r,
void *, unsigned long *c),
void *ctxt);
+/* Merge rangeset r2 into rangeset r1. */
+int __must_check rangeset_merge(struct rangeset *r1, struct rangeset *r2);
+
/* Add/remove/query a single number. */
int __must_check rangeset_add_singleton(
struct rangeset *r, unsigned long s);
--
2.17.1
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