[Arm-dev] [PATCH v1 87/87] Compiler bug workaround!!!

From: Tomasz Nowicki <tomasz.nowicki at linaro.org>

Signed-off-by: Tomasz Nowicki <tomasz.nowicki at linaro.org>
Signed-off-by: Robert Richter <rrichter at cavium.com>
Signed-off-by: Vadim Lomovtsev <Vadim.Lomovtsev at caviumnetworks.com>
---
 drivers/tty/n_tty.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index ee8bfac..8ad43b5 100644
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -1711,6 +1711,7 @@ n_tty_receive_buf_common(struct tty_struct *tty, const unsigned char *cp,
 {
 	struct n_tty_data *ldata = tty->disc_data;
 	int room, n, rcvd = 0, overflow;
+	size_t *read_tail_tmp = &ldata->read_tail;
 
 	down_read(&tty->termios_rwsem);
 
@@ -1728,7 +1729,7 @@ n_tty_receive_buf_common(struct tty_struct *tty, const unsigned char *cp,
 		 * the consumer has loaded the data in read_buf up to the new
 		 * read_tail (so this producer will not overwrite unread data)
 		 */
-		size_t tail = smp_load_acquire(&ldata->read_tail);
+		size_t tail = smp_load_acquire(read_tail_tmp);
 
 		room = N_TTY_BUF_SIZE - (ldata->read_head - tail);
 		if (I_PARMRK(tty))
-- 
2.4.3