TTY: crisv10, remove unused tmp_buf
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>
diff --git a/drivers/tty/serial/crisv10.c b/drivers/tty/serial/crisv10.c
index 5b07c0c..004ee2e 100644
--- a/drivers/tty/serial/crisv10.c
+++ b/drivers/tty/serial/crisv10.c
@@ -952,19 +952,6 @@
/* 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 @@
/* 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 @@
{
struct e100_serial *info;
int retval;
- unsigned long page;
int allocated_resources = 0;
info = rs_table + tty->index;
@@ -4124,17 +4110,6 @@
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
*/