s390/bitops: add for_each_set_bit_inv helper

Same helper function like for_each_set_bit in generic code.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

arch/s390/include/asm/bitops.h

@@ -253,6 +253,11 @@ unsigned long find_first_bit_inv(const unsigned long *addr, unsigned long size);
 unsigned long find_next_bit_inv(const unsigned long *addr, unsigned long size,
 				unsigned long offset);
 
+#define for_each_set_bit_inv(bit, addr, size)				\
+	for ((bit) = find_first_bit_inv((addr), (size));		\
+	     (bit) < (size);						\
+	     (bit) = find_next_bit_inv((addr), (size), (bit) + 1))
+
 static inline void set_bit_inv(unsigned long nr, volatile unsigned long *ptr)
 {
 	return set_bit(nr ^ (BITS_PER_LONG - 1), ptr);