[Xen-changelog] [xen staging] rangeset: introduce rangeset_merge

[patchbot@xxxxxxx]

commit 761de0b8920c35993a0b6559ceb416155ac5407a
Author:     Roger Pau Monne <roger.pau@xxxxxxxxxx>
AuthorDate: Tue Jul 17 11:48:26 2018 +0200
Commit:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CommitDate: Wed Oct 17 14:28:30 2018 +0100

    rangeset: introduce rangeset_merge
    
    This new helper will merge two rangesets.
    
    Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
    Acked-by: Wei Liu <wei.liu2@xxxxxxxxxx>
---
 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 e3857ab816..f34cafdc7e 100644
--- a/xen/common/rangeset.c
+++ b/xen/common/rangeset.c
@@ -384,6 +384,18 @@ 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);
--
generated by git-patchbot for /home/xen/git/xen.git#staging

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