s390/char: use for_each_clear_bit()

Use for_each_clear_bit() to iterate over all the cleared bit in a
memory region.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 3 deletions

diff --git a/drivers/s390/char/sclp_cmd.c b/drivers/s390/char/sclp_cmd.c
index 0b54a91f8dcd..168525a9c292 100644
--- a/drivers/s390/char/sclp_cmd.c
+++ b/drivers/s390/char/sclp_cmd.c
@@ -441,9 +441,8 @@ static int sclp_mem_notifier(struct notifier_block *nb,
         start = arg->start_pfn << PAGE_SHIFT;
         size = arg->nr_pages << PAGE_SHIFT;
         mutex_lock(&sclp_mem_mutex);
-        for (id = 0; id <= sclp_max_storage_id; id++)
-                if (!test_bit(id, sclp_storage_ids))
-                        sclp_attach_storage(id);
+        for_each_clear_bit(id, sclp_storage_ids, sclp_max_storage_id + 1)
+                sclp_attach_storage(id);
         switch (action) {
         case MEM_ONLINE:
         case MEM_GOING_OFFLINE: