diff options
author | Jiri Slaby <jirislaby@gmail.com> | 2006-10-04 09:15:27 (GMT) |
---|---|---|
committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-10-04 14:55:13 (GMT) |
commit | b3218a79aa3d58b975b066c300153a8520f7051c (patch) | |
tree | ecdbadacd84a00682bf047c0cdae1194cad3c38c /drivers/char/serial167.c | |
parent | 1d2c8eea698514cfaa53fc991b960791d09508e1 (diff) | |
download | linux-b3218a79aa3d58b975b066c300153a8520f7051c.tar.xz |
[PATCH] char: kill unneeded memsets
char, another tmp_buf cleanup
No need to allocate one page as a side buffer. It's no more used. Clean this
(de)allocs of this useless memory pages in char subtree.
Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/char/serial167.c')
-rw-r--r-- | drivers/char/serial167.c | 20 |
1 files changed, 1 insertions, 19 deletions
diff --git a/drivers/char/serial167.c b/drivers/char/serial167.c index b4ea126..48dae5d 100644 --- a/drivers/char/serial167.c +++ b/drivers/char/serial167.c @@ -119,17 +119,6 @@ struct cyclades_port cy_port[] = { #define NR_PORTS ARRAY_SIZE(cy_port) /* - * tmp_buf is used as a temporary buffer by serial_write. We need to - * lock it in case the copy_from_user 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 = 0; - -/* * This is used to look up the divisor speeds and the timeouts * We're normally limited to 15 distinct baud rates. The extra * are accessed via settings in info->flags. @@ -1198,7 +1187,7 @@ cy_write(struct tty_struct * tty, return 0; } - if (!tty || !info->xmit_buf || !tmp_buf){ + if (!tty || !info->xmit_buf){ return 0; } @@ -1983,13 +1972,6 @@ cy_open(struct tty_struct *tty, struct file * filp) tty->driver_data = info; info->tty = tty; - if (!tmp_buf) { - tmp_buf = (unsigned char *) get_zeroed_page(GFP_KERNEL); - if (!tmp_buf){ - return -ENOMEM; - } - } - /* * Start up serial port */ |