linux-kernel - [PATCH] fs: direct-io: use DIV_ROUND

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Message-ID: <1636341011-6494-1-git-send-email-wubo40@huawei.com>
Date:   Mon, 8 Nov 2021 11:10:11 +0800
From:   Wu Bo <wubo40@...wei.com>
To:     <viro@...iv.linux.org.uk>
CC:     <linux-fsdevel@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linfeilong@...wei.com>, <wubo40@...wei.com>
Subject: [PATCH] fs: direct-io: use DIV_ROUND_UP helper macro for calculations

Replace open coded divisor calculations with the DIV_ROUND_UP kernel
macro for better readability.

Signed-off-by: Wu Bo <wubo40@...wei.com>
---
 fs/direct-io.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/direct-io.c b/fs/direct-io.c
index 6544435..e5869c2 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -194,7 +194,7 @@ static inline int dio_refill_pages(struct dio *dio, struct dio_submit *sdio)
 		iov_iter_advance(sdio->iter, ret);
 		ret += sdio->from;
 		sdio->head = 0;
-		sdio->tail = (ret + PAGE_SIZE - 1) / PAGE_SIZE;
+		sdio->tail = DIV_ROUND_UP(ret, PAGE_SIZE);
 		sdio->to = ((ret - 1) & (PAGE_SIZE - 1)) + 1;
 		return 0;
 	}
-- 
2.29.2