linux-kernel - [PATCH 5/7] s390/char: use for_each_clear

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Message-Id: <1326470004-10096-6-git-send-email-akinobu.mita@gmail.com>
Date:	Sat, 14 Jan 2012 00:53:22 +0900
From:	Akinobu Mita <akinobu.mita@...il.com>
To:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org
Cc:	Akinobu Mita <akinobu.mita@...il.com>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	linux390@...ibm.com, linux-s390@...r.kernel.org
Subject: [PATCH 5/7] 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@...il.com>
Cc: Martin Schwidefsky <schwidefsky@...ibm.com>
Cc: Heiko Carstens <heiko.carstens@...ibm.com>
Cc: linux390@...ibm.com
Cc: linux-s390@...r.kernel.org
---
 drivers/s390/char/sclp_cmd.c |    5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/s390/char/sclp_cmd.c b/drivers/s390/char/sclp_cmd.c
index 0b54a91..168525a 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:
-- 
1.7.4.4

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