[PATCH v2 12/14] tty: n_tty: unify counts to size_t

From: Jiri Slaby (SUSE)
Date: Sun Aug 27 2023 - 03:44:35 EST


Some count types are already 'size_t' for a long time. Some were
switched to 'size_t' recently. Unify the rest with those now.

This allows for some min_t()s to become min()s. And make one min()
an explicit min_t() as we are comparing signed 'room' to unsigned
'count'.

Signed-off-by: Jiri Slaby (SUSE) <jirislaby@xxxxxxxxxx>
---
drivers/tty/n_tty.c | 32 +++++++++++++++-----------------
1 file changed, 15 insertions(+), 17 deletions(-)

diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index cf42b8b4ad2e..bd6cd28f734f 100644
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -1523,27 +1523,27 @@ static void n_tty_lookahead_flow_ctrl(struct tty_struct *tty, const u8 *cp,

static void
n_tty_receive_buf_real_raw(const struct tty_struct *tty, const u8 *cp,
- int count)
+ size_t count)
{
struct n_tty_data *ldata = tty->disc_data;
size_t n, head;

head = MASK(ldata->read_head);
- n = min_t(size_t, count, N_TTY_BUF_SIZE - head);
+ n = min(count, N_TTY_BUF_SIZE - head);
memcpy(read_buf_addr(ldata, head), cp, n);
ldata->read_head += n;
cp += n;
count -= n;

head = MASK(ldata->read_head);
- n = min_t(size_t, count, N_TTY_BUF_SIZE - head);
+ n = min(count, N_TTY_BUF_SIZE - head);
memcpy(read_buf_addr(ldata, head), cp, n);
ldata->read_head += n;
}

static void
n_tty_receive_buf_raw(struct tty_struct *tty, const u8 *cp, const u8 *fp,
- int count)
+ size_t count)
{
struct n_tty_data *ldata = tty->disc_data;
u8 flag = TTY_NORMAL;
@@ -1560,7 +1560,7 @@ n_tty_receive_buf_raw(struct tty_struct *tty, const u8 *cp, const u8 *fp,

static void
n_tty_receive_buf_closing(struct tty_struct *tty, const u8 *cp, const u8 *fp,
- int count, bool lookahead_done)
+ size_t count, bool lookahead_done)
{
u8 flag = TTY_NORMAL;

@@ -1573,7 +1573,7 @@ n_tty_receive_buf_closing(struct tty_struct *tty, const u8 *cp, const u8 *fp,
}

static void n_tty_receive_buf_standard(struct tty_struct *tty, const u8 *cp,
- const u8 *fp, int count,
+ const u8 *fp, size_t count,
bool lookahead_done)
{
struct n_tty_data *ldata = tty->disc_data;
@@ -1612,11 +1612,11 @@ static void n_tty_receive_buf_standard(struct tty_struct *tty, const u8 *cp,
}

static void __receive_buf(struct tty_struct *tty, const u8 *cp, const u8 *fp,
- int count)
+ size_t count)
{
struct n_tty_data *ldata = tty->disc_data;
bool preops = I_ISTRIP(tty) || (I_IUCLC(tty) && L_IEXTEN(tty));
- size_t la_count = min_t(size_t, ldata->lookahead_count, count);
+ size_t la_count = min(ldata->lookahead_count, count);

if (ldata->real_raw)
n_tty_receive_buf_real_raw(tty, cp, count);
@@ -1687,11 +1687,11 @@ static void __receive_buf(struct tty_struct *tty, const u8 *cp, const u8 *fp,
*/
static size_t
n_tty_receive_buf_common(struct tty_struct *tty, const u8 *cp, const u8 *fp,
- int count, bool flow)
+ size_t count, bool flow)
{
struct n_tty_data *ldata = tty->disc_data;
- size_t rcvd = 0;
- int room, n, overflow;
+ size_t n, rcvd = 0;
+ int room, overflow;

down_read(&tty->termios_rwsem);

@@ -1724,7 +1724,7 @@ n_tty_receive_buf_common(struct tty_struct *tty, const u8 *cp, const u8 *fp,
} else
overflow = 0;

- n = min(count, room);
+ n = min_t(size_t, count, room);
if (!n)
break;

@@ -1954,9 +1954,8 @@ static inline int input_available_p(const struct tty_struct *tty, int poll)
* caller holds non-exclusive %termios_rwsem;
* read_tail published
*/
-static bool copy_from_read_buf(const struct tty_struct *tty,
- u8 **kbp,
- size_t *nr)
+static bool copy_from_read_buf(const struct tty_struct *tty, u8 **kbp,
+ size_t *nr)

{
struct n_tty_data *ldata = tty->disc_data;
@@ -2009,8 +2008,7 @@ static bool copy_from_read_buf(const struct tty_struct *tty,
* caller holds non-exclusive %termios_rwsem;
* read_tail published
*/
-static bool canon_copy_from_read_buf(const struct tty_struct *tty,
- u8 **kbp,
+static bool canon_copy_from_read_buf(const struct tty_struct *tty, u8 **kbp,
size_t *nr)
{
struct n_tty_data *ldata = tty->disc_data;
--
2.42.0