[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>

1 files changed, 1 insertions, 18 deletions

diff --git a/drivers/char/generic_serial.c b/drivers/char/generic_serial.c
index 4711d9b3a595..87127e49c0db 100644
--- a/drivers/char/generic_serial.c
+++ b/drivers/char/generic_serial.c
@@ -33,8 +33,6 @@
 
 #define DEBUG 
 
-static char *                  tmp_buf; 
-
 static int gs_debug;
 
 #ifdef DEBUG
@@ -205,7 +203,7 @@ int gs_write(struct tty_struct * tty,
         if (!tty) return -EIO;
 
         port = tty->driver_data;
-        if (!port || !port->xmit_buf || !tmp_buf)
+        if (!port || !port->xmit_buf)
                 return -EIO;
 
         local_save_flags(flags);
@@ -837,24 +835,9 @@ void gs_set_termios (struct tty_struct * tty,
 int gs_init_port(struct gs_port *port)
 {
         unsigned long flags;
-        unsigned long page;
 
         func_enter ();
 
-        if (!tmp_buf) {
-                page = get_zeroed_page(GFP_KERNEL);
-                spin_lock_irqsave (&port->driver_lock, flags); /* Don't expect this to make a difference. */
-                if (tmp_buf)
-                        free_page(page);
-                else
-                        tmp_buf = (unsigned char *) page;
-                spin_unlock_irqrestore (&port->driver_lock, flags);
-                if (!tmp_buf) {
-                        func_exit ();
-                        return -ENOMEM;
-                }
-        }
-
         if (port->flags & ASYNC_INITIALIZED) {
                 func_exit ();
                 return 0;