kern/bitmap: new bitmap_copy function

1 files changed, 9 insertions, 0 deletions

diff --git a/kern/bitmap.h b/kern/bitmap.h
index 9fc92986..526824d6 100644
--- a/kern/bitmap.h
+++ b/kern/bitmap.h
@@ -93,6 +93,15 @@ bitmap_fill(unsigned long *bm, int nr_bits)
 }
 
 static inline void
+bitmap_copy(unsigned long *dest, const unsigned long *src, int nr_bits)
+{
+    int n;
+
+    n = BITMAP_LONGS(nr_bits);
+    memcpy(dest, src, n * sizeof(unsigned long));
+}
+
+static inline void
 bitmap_set(unsigned long *bm, int bit)
 {
     if (bit >= LONG_BIT)