1 files changed, 11 insertions, 0 deletions
diff --git a/util/bitmap.c b/util/bitmap.c
index c1a84ca5e3..efced9a7d8 100644
--- a/util/bitmap.c
+++ b/util/bitmap.c
@@ -287,6 +287,17 @@ bool bitmap_test_and_clear_atomic(unsigned long *map, long start, long nr)
     return dirty != 0;
 }
 
+void bitmap_copy_and_clear_atomic(unsigned long *dst, unsigned long *src,
+                                  long nr)
+{
+    while (nr > 0) {
+        *dst = atomic_xchg(src, 0);
+        dst++;
+        src++;
+        nr -= BITS_PER_LONG;
+    }
+}
+
 #define ALIGN_MASK(x,mask)      (((x)+(mask))&~(mask))
 
 /**