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TTY: crisv10, remove unused tmp_buf

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This used to be a helper buffer for generic_serial. generic_serial is
gone, tmp_buf shall be removed.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Mikael Starvik <starvik@axis.com>
Acked-by: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: linux-cris-kernel@axis.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiri Slaby 2012-04-02 13:53:45 +02:00 committed by Greg Kroah-Hartman
parent 0034102808
commit 37f00f62af
1 changed files with 1 additions and 26 deletions
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27
drivers/tty/serial/crisv10.c
View file

@ -952,19 +952,6 @@ static const struct control_pins e100_modem_pins[NR_PORTS] =
/* Input */
#define E100_DSR_GET(info) ((*e100_modem_pins[(info)->line].dsr_port) & e100_modem_pins[(info)->line].dsr_mask)
/*
* tmp_buf is used as a temporary buffer by serial_write. We need to
* lock it in case the memcpy_fromfs blocks while swapping in a page,
* and some other program tries to do a serial write at the same time.
* Since the lock will only come under contention when the system is
* swapping and available memory is low, it makes sense to share one
* buffer across all the serial ports, since it significantly saves
* memory if large numbers of serial ports are open.
*/
static unsigned char *tmp_buf;
static DEFINE_MUTEX(tmp_buf_mutex);
/* Calculate the chartime depending on baudrate, numbor of bits etc. */
static void update_char_time(struct e100_serial * info)
{
@ -3150,7 +3137,7 @@ static int rs_raw_write(struct tty_struct *tty,
/* first some sanity checks */
if (!tty || !info->xmit.buf || !tmp_buf)
if (!tty || !info->xmit.buf)
return 0;
#ifdef SERIAL_DEBUG_DATA
@ -4106,7 +4093,6 @@ rs_open(struct tty_struct *tty, struct file * filp)
{
struct e100_serial *info;
int retval;
unsigned long page;
int allocated_resources = 0;
info = rs_table + tty->index;
@ -4124,17 +4110,6 @@ rs_open(struct tty_struct *tty, struct file * filp)
tty->low_latency = !!(info->flags & ASYNC_LOW_LATENCY);
if (!tmp_buf) {
page = get_zeroed_page(GFP_KERNEL);
if (!page) {
return -ENOMEM;
}
if (tmp_buf)
free_page(page);
else
tmp_buf = (unsigned char *) page;
}
/*
* If the port is in the middle of closing, bail out now
*/