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SubjectRe: [PATCH] tty/serial: atmel: use offset_in_page() macro
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On 22/04/2017 03:21, Geliang Tang wrote:
> Use offset_in_page() macro instead of open-coding.
>
> Signed-off-by: Geliang Tang <geliangtang@gmail.com>
> ---
> drivers/tty/serial/atmel_serial.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c
> index c355ac9..f398db8 100644
> --- a/drivers/tty/serial/atmel_serial.c
> +++ b/drivers/tty/serial/atmel_serial.c
> @@ -959,7 +959,7 @@ static int atmel_prepare_tx_dma(struct uart_port *port)
> sg_set_page(&atmel_port->sg_tx,
> virt_to_page(port->state->xmit.buf),
> UART_XMIT_SIZE,
> - (unsigned long)port->state->xmit.buf & ~PAGE_MASK);
> + offset_in_page(port->state->xmit.buf));
> nent = dma_map_sg(port->dev,
> &atmel_port->sg_tx,
> 1,
> @@ -1141,7 +1141,7 @@ static int atmel_prepare_rx_dma(struct uart_port *port)
> sg_set_page(&atmel_port->sg_rx,
> virt_to_page(ring->buf),
> sizeof(struct atmel_uart_char) * ATMEL_SERIAL_RINGSIZE,
> - (unsigned long)ring->buf & ~PAGE_MASK);
> + offset_in_page(ring->buf));
> nent = dma_map_sg(port->dev,
> &atmel_port->sg_rx,
> 1,
>
I guess you want to #include <linux/mm.h>
(even if it compiles ok without it)

Regards,
Richard.

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