1 files changed, 11 insertions, 0 deletions
diff --git a/lib/find_bit.c b/lib/find_bit.c
index 0836bb3d76c5..06b6342aa3ae 100644
--- a/lib/find_bit.c
+++ b/lib/find_bit.c
@@ -117,6 +117,17 @@ EXPORT_SYMBOL(_find_first_and_bit);
 #endif
 
 /*
+ * Find the first bit set in 1st memory region and unset in 2nd.
+ */
+unsigned long _find_first_andnot_bit(const unsigned long *addr1,
+				  const unsigned long *addr2,
+				  unsigned long size)
+{
+	return FIND_FIRST_BIT(addr1[idx] & ~addr2[idx], /* nop */, size);
+}
+EXPORT_SYMBOL(_find_first_andnot_bit);
+
+/*
  * Find the first set bit in three memory regions.
  */
 unsigned long _find_first_and_and_bit(const unsigned long *addr1,