drivers/tty/serial/serial_core.c: clean up HIGH_BITS_OFFSET usage

serial_core.c usually does

	if (HIGH_BITS_OFFSET)
		expr-involving-HIGH_BITS_OFFSET()

at least to avoid generating useless code on 32-bit machines, where
HIGH_BITS_OFFSET is zero.  Do that in uart_get_attr_port().

Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 5 insertions, 1 deletions

diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 61ba24089ef7..fb5aa42fde7e 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -2370,9 +2370,13 @@ static ssize_t uart_get_attr_port(struct device *dev,
 {
         struct serial_struct tmp;
         struct tty_port *port = dev_get_drvdata(dev);
+        unsigned long ioaddr;
 
         uart_get_info(port, &tmp);
-        return snprintf(buf, PAGE_SIZE, "0x%lX\n", (unsigned long)(tmp.port | (((unsigned long)tmp.port_high) << HIGH_BITS_OFFSET)));
+        ioaddr = tmp.port;
+        if (HIGH_BITS_OFFSET)
+                ioaddr |= (unsigned long)tmp.port_high << HIGH_BITS_OFFSET;
+        return snprintf(buf, PAGE_SIZE, "0x%lX\n", ioaddr);
 }
 
 static ssize_t uart_get_attr_irq(struct device *dev,