We will need this new helper in the next patch.
Cc: Hillf Danton <hdanton@xxxxxxxx>
Cc: 一只狗 <chennbnbnb@xxxxxxxxx>
Cc: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
---
drivers/tty/tty_buffer.c | 15 ++++++++++-----
1 file changed, 10 insertions(+), 5 deletions(-)
diff --git a/drivers/tty/tty_buffer.c b/drivers/tty/tty_buffer.c
index 754fa43670cc..ea630ceda009 100644
--- a/drivers/tty/tty_buffer.c
+++ b/drivers/tty/tty_buffer.c
@@ -573,6 +573,15 @@ static void flush_to_ldisc(struct work_struct *work)
}
+static inline void tty_flip_buffer_commit(struct tty_buffer *tail)
+{
+ /*
+ * Paired w/ acquire in flush_to_ldisc(); ensures flush_to_ldisc() sees
+ * buffer data.
+ */
+ smp_store_release(&tail->commit, tail->used);
+}
+
/**
* tty_flip_buffer_push - push terminal buffers
* @port: tty port to push
@@ -587,11 +596,7 @@ void tty_flip_buffer_push(struct tty_port *port)
{
struct tty_bufhead *buf = &port->buf;
- /*
- * Paired w/ acquire in flush_to_ldisc(); ensures flush_to_ldisc() sees
- * buffer data.
- */
- smp_store_release(&buf->tail->commit, buf->tail->used);
+ tty_flip_buffer_commit(buf->tail);
queue_work(system_unbound_wq, &buf->work);
}
EXPORT_SYMBOL(tty_flip_buffer_push);
--
2.36.1
