linux-kernel - [PATCH] serial: pch_uart: use offset_in

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Message-Id: <dd629376828f23645aff2d8ba663ed1340ec33e9.1492759587.git.geliangtang@gmail.com>
Date:   Sat, 22 Apr 2017 09:21:11 +0800
From:   Geliang Tang <geliangtang@...il.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jslaby@...e.com>
Cc:     Geliang Tang <geliangtang@...il.com>, linux-serial@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] serial: pch_uart: use offset_in_page() macro

Use offset_in_page() macro instead of open-coding.

Signed-off-by: Geliang Tang <geliangtang@...il.com>
---
 drivers/tty/serial/pch_uart.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c
index 42caccb..d3796dc 100644
--- a/drivers/tty/serial/pch_uart.c
+++ b/drivers/tty/serial/pch_uart.c
@@ -878,8 +878,7 @@ static int dma_handle_rx(struct eg20t_port *priv)
 	sg_dma_len(sg) = priv->trigger_level;
 
 	sg_set_page(&priv->sg_rx, virt_to_page(priv->rx_buf_virt),
-		     sg_dma_len(sg), (unsigned long)priv->rx_buf_virt &
-		     ~PAGE_MASK);
+		     sg_dma_len(sg), offset_in_page(priv->rx_buf_virt));
 
 	sg_dma_address(sg) = priv->rx_buf_dma;
 
-- 
2.9.3