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Message-ID: <20230816105822.3685-16-jirislaby@kernel.org>
Date: Wed, 16 Aug 2023 12:58:19 +0200
From: "Jiri Slaby (SUSE)" <jirislaby@...nel.org>
To: gregkh@...uxfoundation.org
Cc: linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org,
"Jiri Slaby (SUSE)" <jirislaby@...nel.org>
Subject: [PATCH 11/14] tty: n_tty: use u8 for chars and flags
Unify with the tty layer and use u8 for both chars and flags.
Signed-off-by: Jiri Slaby (SUSE) <jirislaby@...nel.org>
---
drivers/tty/n_tty.c | 72 ++++++++++++++++++++++-----------------------
1 file changed, 36 insertions(+), 36 deletions(-)
diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index 3815201c220b..4c2f77996ad3 100644
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -109,9 +109,9 @@ struct n_tty_data {
unsigned char push:1;
/* shared by producer and consumer */
- char read_buf[N_TTY_BUF_SIZE];
+ u8 read_buf[N_TTY_BUF_SIZE];
DECLARE_BITMAP(read_flags, N_TTY_BUF_SIZE);
- unsigned char echo_buf[N_TTY_BUF_SIZE];
+ u8 echo_buf[N_TTY_BUF_SIZE];
/* consumer-published */
size_t read_tail;
@@ -136,23 +136,23 @@ static inline size_t read_cnt(struct n_tty_data *ldata)
return ldata->read_head - ldata->read_tail;
}
-static inline unsigned char read_buf(struct n_tty_data *ldata, size_t i)
+static inline u8 read_buf(struct n_tty_data *ldata, size_t i)
{
return ldata->read_buf[MASK(i)];
}
-static inline unsigned char *read_buf_addr(struct n_tty_data *ldata, size_t i)
+static inline u8 *read_buf_addr(struct n_tty_data *ldata, size_t i)
{
return &ldata->read_buf[MASK(i)];
}
-static inline unsigned char echo_buf(struct n_tty_data *ldata, size_t i)
+static inline u8 echo_buf(struct n_tty_data *ldata, size_t i)
{
smp_rmb(); /* Matches smp_wmb() in add_echo_byte(). */
return ldata->echo_buf[MASK(i)];
}
-static inline unsigned char *echo_buf_addr(struct n_tty_data *ldata, size_t i)
+static inline u8 *echo_buf_addr(struct n_tty_data *ldata, size_t i)
{
return &ldata->echo_buf[MASK(i)];
}
@@ -303,7 +303,7 @@ static void n_tty_check_unthrottle(struct tty_struct *tty)
* * n_tty_receive_buf()/producer path:
* caller holds non-exclusive %termios_rwsem
*/
-static inline void put_tty_queue(unsigned char c, struct n_tty_data *ldata)
+static inline void put_tty_queue(u8 c, struct n_tty_data *ldata)
{
*read_buf_addr(ldata, ldata->read_head) = c;
ldata->read_head++;
@@ -377,7 +377,7 @@ static void n_tty_flush_buffer(struct tty_struct *tty)
* character. We use this to correctly compute the on-screen size of the
* character when printing.
*/
-static inline int is_utf8_continuation(unsigned char c)
+static inline int is_utf8_continuation(u8 c)
{
return (c & 0xc0) == 0x80;
}
@@ -390,7 +390,7 @@ static inline int is_utf8_continuation(unsigned char c)
* Returns: true if the utf8 character @c is a multibyte continuation character
* and the terminal is in unicode mode.
*/
-static inline int is_continuation(unsigned char c, const struct tty_struct *tty)
+static inline int is_continuation(u8 c, const struct tty_struct *tty)
{
return I_IUTF8(tty) && is_utf8_continuation(c);
}
@@ -414,7 +414,7 @@ static inline int is_continuation(unsigned char c, const struct tty_struct *tty)
* Locking: should be called under the %output_lock to protect the column state
* and space left in the buffer.
*/
-static int do_output_char(unsigned char c, struct tty_struct *tty, int space)
+static int do_output_char(u8 c, struct tty_struct *tty, int space)
{
struct n_tty_data *ldata = tty->disc_data;
int spaces;
@@ -488,7 +488,7 @@ static int do_output_char(unsigned char c, struct tty_struct *tty, int space)
* Locking: %output_lock to protect column state and space left (also, this is
*called from n_tty_write() under the tty layer write lock).
*/
-static int process_output(unsigned char c, struct tty_struct *tty)
+static int process_output(u8 c, struct tty_struct *tty)
{
struct n_tty_data *ldata = tty->disc_data;
int space, retval;
@@ -524,12 +524,12 @@ static int process_output(unsigned char c, struct tty_struct *tty)
* called from n_tty_write() under the tty layer write lock).
*/
static ssize_t process_output_block(struct tty_struct *tty,
- const unsigned char *buf, unsigned int nr)
+ const u8 *buf, unsigned int nr)
{
struct n_tty_data *ldata = tty->disc_data;
int space;
int i;
- const unsigned char *cp;
+ const u8 *cp;
mutex_lock(&ldata->output_lock);
@@ -542,7 +542,7 @@ static ssize_t process_output_block(struct tty_struct *tty,
nr = space;
for (i = 0, cp = buf; i < nr; i++, cp++) {
- unsigned char c = *cp;
+ u8 c = *cp;
switch (c) {
case '\n':
@@ -609,7 +609,7 @@ static size_t __process_echoes(struct tty_struct *tty)
struct n_tty_data *ldata = tty->disc_data;
int space, old_space;
size_t tail;
- unsigned char c;
+ u8 c;
old_space = space = tty_write_room(tty);
@@ -617,7 +617,7 @@ static size_t __process_echoes(struct tty_struct *tty)
while (MASK(ldata->echo_commit) != MASK(tail)) {
c = echo_buf(ldata, tail);
if (c == ECHO_OP_START) {
- unsigned char op;
+ u8 op;
bool space_left = true;
/*
@@ -818,7 +818,7 @@ static void flush_echoes(struct tty_struct *tty)
*
* Add a character or operation byte to the echo buffer.
*/
-static inline void add_echo_byte(unsigned char c, struct n_tty_data *ldata)
+static inline void add_echo_byte(u8 c, struct n_tty_data *ldata)
{
*echo_buf_addr(ldata, ldata->echo_head) = c;
smp_wmb(); /* Matches smp_rmb() in echo_buf(). */
@@ -889,7 +889,7 @@ static void echo_erase_tab(unsigned int num_chars, int after_tab,
*
* This variant does not treat control characters specially.
*/
-static void echo_char_raw(unsigned char c, struct n_tty_data *ldata)
+static void echo_char_raw(u8 c, struct n_tty_data *ldata)
{
if (c == ECHO_OP_START) {
add_echo_byte(ECHO_OP_START, ldata);
@@ -910,7 +910,7 @@ static void echo_char_raw(unsigned char c, struct n_tty_data *ldata)
* This variant tags control characters to be echoed as "^X" (where X is the
* letter representing the control char).
*/
-static void echo_char(unsigned char c, const struct tty_struct *tty)
+static void echo_char(u8 c, const struct tty_struct *tty)
{
struct n_tty_data *ldata = tty->disc_data;
@@ -948,7 +948,7 @@ static inline void finish_erasing(struct n_tty_data *ldata)
* Locking: n_tty_receive_buf()/producer path:
* caller holds non-exclusive %termios_rwsem
*/
-static void eraser(unsigned char c, const struct tty_struct *tty)
+static void eraser(u8 c, const struct tty_struct *tty)
{
struct n_tty_data *ldata = tty->disc_data;
enum { ERASE, WERASE, KILL } kill_type;
@@ -1188,7 +1188,7 @@ static void n_tty_receive_overrun(const struct tty_struct *tty)
* caller holds non-exclusive %termios_rwsem
*/
static void n_tty_receive_parity_error(const struct tty_struct *tty,
- unsigned char c)
+ u8 c)
{
struct n_tty_data *ldata = tty->disc_data;
@@ -1206,7 +1206,7 @@ static void n_tty_receive_parity_error(const struct tty_struct *tty,
}
static void
-n_tty_receive_signal_char(struct tty_struct *tty, int signal, unsigned char c)
+n_tty_receive_signal_char(struct tty_struct *tty, int signal, u8 c)
{
isig(signal, tty);
if (I_IXON(tty))
@@ -1218,7 +1218,7 @@ n_tty_receive_signal_char(struct tty_struct *tty, int signal, unsigned char c)
process_echoes(tty);
}
-static bool n_tty_is_char_flow_ctrl(struct tty_struct *tty, unsigned char c)
+static bool n_tty_is_char_flow_ctrl(struct tty_struct *tty, u8 c)
{
return c == START_CHAR(tty) || c == STOP_CHAR(tty);
}
@@ -1238,7 +1238,7 @@ static bool n_tty_is_char_flow_ctrl(struct tty_struct *tty, unsigned char c)
* Returns true if @c is consumed as flow-control character, the character
* must not be treated as normal character.
*/
-static bool n_tty_receive_char_flow_ctrl(struct tty_struct *tty, unsigned char c,
+static bool n_tty_receive_char_flow_ctrl(struct tty_struct *tty, u8 c,
bool lookahead_done)
{
if (!n_tty_is_char_flow_ctrl(tty, c))
@@ -1354,7 +1354,7 @@ static bool n_tty_receive_char_canon(struct tty_struct *tty, u8 c)
return false;
}
-static void n_tty_receive_char_special(struct tty_struct *tty, unsigned char c,
+static void n_tty_receive_char_special(struct tty_struct *tty, u8 c,
bool lookahead_done)
{
struct n_tty_data *ldata = tty->disc_data;
@@ -1423,7 +1423,7 @@ static void n_tty_receive_char_special(struct tty_struct *tty, unsigned char c,
* caller holds non-exclusive %termios_rwsem
* publishes canon_head if canonical mode is active
*/
-static void n_tty_receive_char(struct tty_struct *tty, unsigned char c)
+static void n_tty_receive_char(struct tty_struct *tty, u8 c)
{
struct n_tty_data *ldata = tty->disc_data;
@@ -1445,7 +1445,7 @@ static void n_tty_receive_char(struct tty_struct *tty, unsigned char c)
put_tty_queue(c, ldata);
}
-static void n_tty_receive_char_closing(struct tty_struct *tty, unsigned char c,
+static void n_tty_receive_char_closing(struct tty_struct *tty, u8 c,
bool lookahead_done)
{
if (I_ISTRIP(tty))
@@ -1465,7 +1465,7 @@ static void n_tty_receive_char_closing(struct tty_struct *tty, unsigned char c,
}
static void
-n_tty_receive_char_flagged(struct tty_struct *tty, unsigned char c, char flag)
+n_tty_receive_char_flagged(struct tty_struct *tty, u8 c, u8 flag)
{
switch (flag) {
case TTY_BREAK:
@@ -1479,13 +1479,13 @@ n_tty_receive_char_flagged(struct tty_struct *tty, unsigned char c, char flag)
n_tty_receive_overrun(tty);
break;
default:
- tty_err(tty, "unknown flag %d\n", flag);
+ tty_err(tty, "unknown flag %u\n", flag);
break;
}
}
static void
-n_tty_receive_char_lnext(struct tty_struct *tty, unsigned char c, char flag)
+n_tty_receive_char_lnext(struct tty_struct *tty, u8 c, u8 flag)
{
struct n_tty_data *ldata = tty->disc_data;
@@ -1505,7 +1505,7 @@ static void n_tty_lookahead_flow_ctrl(struct tty_struct *tty, const u8 *cp,
const u8 *fp, size_t count)
{
struct n_tty_data *ldata = tty->disc_data;
- unsigned char flag = TTY_NORMAL;
+ u8 flag = TTY_NORMAL;
ldata->lookahead_count += count;
@@ -1562,7 +1562,7 @@ static void
n_tty_receive_buf_closing(struct tty_struct *tty, const u8 *cp, const u8 *fp,
int count, bool lookahead_done)
{
- char flag = TTY_NORMAL;
+ u8 flag = TTY_NORMAL;
while (count--) {
if (fp)
@@ -1955,7 +1955,7 @@ static inline int input_available_p(const struct tty_struct *tty, int poll)
* read_tail published
*/
static bool copy_from_read_buf(const struct tty_struct *tty,
- unsigned char **kbp,
+ u8 **kbp,
size_t *nr)
{
@@ -1968,7 +1968,7 @@ static bool copy_from_read_buf(const struct tty_struct *tty,
n = min(head - ldata->read_tail, N_TTY_BUF_SIZE - tail);
n = min(*nr, n);
if (n) {
- unsigned char *from = read_buf_addr(ldata, tail);
+ u8 *from = read_buf_addr(ldata, tail);
memcpy(*kbp, from, n);
is_eof = n == 1 && *from == EOF_CHAR(tty);
tty_audit_add_data(tty, from, n);
@@ -2010,7 +2010,7 @@ static bool copy_from_read_buf(const struct tty_struct *tty,
* read_tail published
*/
static bool canon_copy_from_read_buf(const struct tty_struct *tty,
- unsigned char **kbp,
+ u8 **kbp,
size_t *nr)
{
struct n_tty_data *ldata = tty->disc_data;
@@ -2229,7 +2229,7 @@ static ssize_t n_tty_read(struct tty_struct *tty, struct file *file, u8 *kbuf,
while (nr) {
/* First test for status change. */
if (packet && tty->link->ctrl.pktstatus) {
- unsigned char cs;
+ u8 cs;
if (kb != kbuf)
break;
spin_lock_irq(&tty->link->ctrl.lock);
--
2.41.0
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