[PATCH 09/35] n_tty: invert TTY_NORMAL condition in n_tty_receive_buf_standard
From: Jiri Slaby <hidden>
Date: 2021-05-05 09:20:04
Also in:
lkml
Subsystem:
the rest, tty layer and serial drivers · Maintainers:
Linus Torvalds, Greg Kroah-Hartman, Jiri Slaby
Handle !TTY_NORMAL as a short path and 'continue' the loop. Do the rest as
a normal code flow. This decreases the indentation level by one and
makes the code flow more understandable.
IOW, we avoid
if (cond) {
LONG CODE;
} else
single_line();
by
if (!cond) {
single_line();
continue;
}
LONG CODE;
While at it, invert also the 'if (!test_bit) A else B' into 'if
(test_bit) B else A'.
Signed-off-by: Jiri Slaby <redacted>
---
drivers/tty/n_tty.c | 31 +++++++++++++++++--------------
1 file changed, 17 insertions(+), 14 deletions(-)
diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index e7c9dce14f88..01883e5c8bbd 100644
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c@@ -1541,21 +1541,24 @@ static void n_tty_receive_buf_standard(struct tty_struct *tty, continue; } - if (likely(flag == TTY_NORMAL)) { - if (I_ISTRIP(tty)) - c &= 0x7f; - if (I_IUCLC(tty) && L_IEXTEN(tty)) - c = tolower(c); - if (L_EXTPROC(tty)) { - put_tty_queue(c, ldata); - continue; - } - if (!test_bit(c, ldata->char_map)) - n_tty_receive_char(tty, c); - else - n_tty_receive_char_special(tty, c); - } else + if (unlikely(flag != TTY_NORMAL)) { n_tty_receive_char_flagged(tty, c, flag); + continue; + } + + if (I_ISTRIP(tty)) + c &= 0x7f; + if (I_IUCLC(tty) && L_IEXTEN(tty)) + c = tolower(c); + if (L_EXTPROC(tty)) { + put_tty_queue(c, ldata); + continue; + } + + if (test_bit(c, ldata->char_map)) + n_tty_receive_char_special(tty, c); + else + n_tty_receive_char(tty, c); } }
--
2.31.1