From: Heesub Shin <heesub.shin@samsung.com>
To: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
        Heesub Shin <heesub.shin@samsung.com>,
        Dongjun Shin <d.j.shin@samsung.com>
Subject: [PATCH] fs/buffer.c: use lowmem_page_address instead of page_address
Date: Tue, 13 Aug 2013 11:37:55 +0900
Message-id: <1376361475-17778-1-git-send-email-heesub.shin@samsung.com>
DLP-Filter: Pass
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 913
Lines: 30

Here, the page has been identified as lowmem already. So, calling
lowmem_page_address() directly is a little cheaper than page_address().

Signed-off-by: Heesub Shin <heesub.shin@samsung.com>
Cc: Dongjun Shin <d.j.shin@samsung.com>
---
 fs/buffer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/buffer.c b/fs/buffer.c
index 695eb14..ccc2c7b 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -1464,7 +1464,7 @@ void set_bh_page(struct buffer_head *bh,
 		 */
 		bh->b_data = (char *)(0 + offset);
 	else
-		bh->b_data = page_address(page) + offset;
+		bh->b_data = lowmem_page_address(page) + offset;
 }
 EXPORT_SYMBOL(set_bh_page);
 
-- 
1.8.3.2

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/