[PATCH] synclink: remove dead code

Remove dead code from synclink driver.  This was used previously when the
write method had a from_user flag, which has been removed.

Signed-off-by: Paul Fulghum <paulkf@microgate.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/drivers/char/synclink.c b/drivers/char/synclink.c
index d68be61f0a49a6372f7aa438752d4f7c4eccbf28..abb03e52fe123379d5d56b0920640b07e25d30c0 100644 (file)
--- a/drivers/char/synclink.c
+++ b/drivers/char/synclink.c
@@ -941,17 +941,6 @@ static void* mgsl_get_text_ptr(void)
        return mgsl_get_text_ptr;
 }
 
-/*
- * tmp_buf is used as a temporary buffer by mgsl_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 ioports, since it significantly saves
- * memory if large numbers of serial ports are open.
- */
-static unsigned char *tmp_buf;
-
 static inline int mgsl_paranoia_check(struct mgsl_struct *info,
                                        char *name, const char *routine)
 {
@@ -2150,7 +2139,7 @@ static int mgsl_write(struct tty_struct * tty,
        if (mgsl_paranoia_check(info, tty->name, "mgsl_write"))
                goto cleanup;
 
-       if (!tty || !info->xmit_buf || !tmp_buf)
+       if (!tty || !info->xmit_buf)
                goto cleanup;
 
        if ( info->params.mode == MGSL_MODE_HDLC ||
@@ -3438,7 +3427,6 @@ static int mgsl_open(struct tty_struct *tty, struct file * filp)
 {
        struct mgsl_struct      *info;
        int                     retval, line;
-       unsigned long           page;
        unsigned long flags;
 
        /* verify range of specified line number */     
@@ -3472,18 +3460,6 @@ static int mgsl_open(struct tty_struct *tty, struct file * filp)
                goto cleanup;
        }
        
-       if (!tmp_buf) {
-               page = get_zeroed_page(GFP_KERNEL);
-               if (!page) {
-                       retval = -ENOMEM;
-                       goto cleanup;
-               }
-               if (tmp_buf)
-                       free_page(page);
-               else
-                       tmp_buf = (unsigned char *) page;
-       }
-       
        info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
 
        spin_lock_irqsave(&info->netlock, flags);
@@ -4502,11 +4478,6 @@ static void synclink_cleanup(void)
                kfree(tmp);
        }
        
-       if (tmp_buf) {
-               free_page((unsigned long) tmp_buf);
-               tmp_buf = NULL;
-       }
-       
        if (pci_registered)
                pci_unregister_driver(&synclink_pci_driver);
 }