[PATCH v4 22/25] tools: bitmap: add missing bitmap_copy() implementation

[Lorenzo Stoakes (Oracle)]

I need this for changes I am making to keep the VMA tests running
correctly.

Signed-off-by: Lorenzo Stoakes (Oracle) <ljs at kernel.org>
---
 tools/include/linux/bitmap.h | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/tools/include/linux/bitmap.h b/tools/include/linux/bitmap.h
index 845eda759f67..5cb4f3942fd3 100644
--- a/tools/include/linux/bitmap.h
+++ b/tools/include/linux/bitmap.h
@@ -55,6 +55,17 @@ static inline void bitmap_fill(unsigned long *dst, unsigned int nbits)
 	dst[nlongs - 1] = BITMAP_LAST_WORD_MASK(nbits);
 }
 
+static __always_inline
+void bitmap_copy(unsigned long *dst, const unsigned long *src, unsigned int nbits)
+{
+	unsigned int len = bitmap_size(nbits);
+
+	if (small_const_nbits(nbits))
+		*dst = *src;
+	else
+		memcpy(dst, src, len);
+}
+
 static inline bool bitmap_empty(const unsigned long *src, unsigned int nbits)
 {
 	if (small_const_nbits(nbits))
-- 
2.53.0