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-rw-r--r--include/linux/bitops.h13
1 files changed, 12 insertions, 1 deletions
diff --git a/include/linux/bitops.h b/include/linux/bitops.h
index 024f2b02724..61829139795 100644
--- a/include/linux/bitops.h
+++ b/include/linux/bitops.h
@@ -134,9 +134,20 @@ extern unsigned long find_first_bit(const unsigned long *addr,
*/
extern unsigned long find_first_zero_bit(const unsigned long *addr,
unsigned long size);
-
#endif /* CONFIG_GENERIC_FIND_FIRST_BIT */
+#ifdef CONFIG_GENERIC_FIND_LAST_BIT
+/**
+ * find_last_bit - find the last set bit in a memory region
+ * @addr: The address to start the search at
+ * @size: The maximum size to search
+ *
+ * Returns the bit number of the first set bit, or size.
+ */
+extern unsigned long find_last_bit(const unsigned long *addr,
+ unsigned long size);
+#endif /* CONFIG_GENERIC_FIND_LAST_BIT */
+
#ifdef CONFIG_GENERIC_FIND_NEXT_BIT
/**