linux-kernel - [PATCH 2/2] fs: direct-io: use DIV_ROUND

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Date:   Tue, 25 May 2021 16:15:20 +0800
From:   Wu Bo <wubo40@...wei.com>
To:     <viro@...iv.linux.org.uk>, <herbert@...dor.apana.org.au>,
        <davem@...emloft.net>, <linux-fsdevel@...r.kernel.org>,
        <linux-crypto@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     <linfeilong@...wei.com>, <wubo40@...wei.com>
Subject: [PATCH 2/2] fs: direct-io: use DIV_ROUND_UP helper macro for calculations

From: Wu Bo <wubo40@...wei.com>

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 b2e86e7..6e7d402 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -195,7 +195,7 @@ 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;
 	}
-- 
1.8.3.1