tty: tty_buffer: initialize variables in initializers already

It makes the code both more compact, and more understandable.

Signed-off-by: "Jiri Slaby (SUSE)" <jirislaby@kernel.org>
Link: https://lore.kernel.org/r/20230816105530.3335-10-jirislaby@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/tty_buffer.c b/drivers/tty/tty_buffer.c
index 414bb7f..44c0ada 100644 (file)
--- a/drivers/tty/tty_buffer.c
+++ b/drivers/tty/tty_buffer.c
@@ -262,17 +262,10 @@ static int __tty_buffer_request_room(struct tty_port *port, size_t size,
                                     bool flags)
 {
        struct tty_bufhead *buf = &port->buf;
-       struct tty_buffer *b, *n;
-       size_t left;
-       bool change;
+       struct tty_buffer *n, *b = buf->tail;
+       size_t left = (b->flags ? 1 : 2) * b->size - b->used;
+       bool change = !b->flags && flags;
 
-       b = buf->tail;
-       if (!b->flags)
-               left = 2 * b->size - b->used;
-       else
-               left = b->size - b->used;
-
-       change = !b->flags && flags;
        if (change || left < size) {
                /* This is the slow path - looking for new buffers to use */
                n = tty_buffer_alloc(port, size);