vserver 1.9.5.x5

[linux-2.6.git] / drivers / macintosh / macserial.c

diff --git a/drivers/macintosh/macserial.c b/drivers/macintosh/macserial.c
index a3a5372..ad0f620 100644 (file)
--- a/drivers/macintosh/macserial.c
+++ b/drivers/macintosh/macserial.c
@@ -32,6 +32,7 @@
 #include <linux/console.h>
 #endif
 #include <linux/slab.h>
+#include <linux/bitops.h>
 
 #include <asm/sections.h>
 #include <asm/io.h>
@@ -40,7 +41,6 @@
 #include <asm/prom.h>
 #include <asm/system.h>
 #include <asm/segment.h>
-#include <asm/bitops.h>
 #include <asm/machdep.h>
 #include <asm/pmac_feature.h>
 #include <linux/adb.h>
@@ -1461,7 +1461,7 @@ static void rs_flush_chars(struct tty_struct *tty)
        spin_unlock_irqrestore(&info->lock, flags);
 }
 
-static int rs_write(struct tty_struct * tty, int from_user,
+static int rs_write(struct tty_struct * tty,
                    const unsigned char *buf, int count)
 {
        int     c, ret = 0;
@@ -1474,51 +1474,22 @@ static int rs_write(struct tty_struct * tty, int from_user,
        if (!tty || !info->xmit_buf || !tmp_buf)
                return 0;
 
-       if (from_user) {
-               down(&tmp_buf_sem);
-               while (1) {
-                       c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
-                                                 SERIAL_XMIT_SIZE - info->xmit_head));
-                       if (c <= 0)
-                               break;
-
-                       c -= copy_from_user(tmp_buf, buf, c);
-                       if (!c) {
-                               if (!ret)
-                                       ret = -EFAULT;
-                               break;
-                       }
-                       spin_lock_irqsave(&info->lock, flags);
-                       c = min_t(int, c, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
-                                             SERIAL_XMIT_SIZE - info->xmit_head));
-                       memcpy(info->xmit_buf + info->xmit_head, tmp_buf, c);
-                       info->xmit_head = ((info->xmit_head + c) &
-                                          (SERIAL_XMIT_SIZE-1));
-                       info->xmit_cnt += c;
-                       spin_unlock_irqrestore(&info->lock, flags);
-                       buf += c;
-                       count -= c;
-                       ret += c;
-               }
-               up(&tmp_buf_sem);
-       } else {
-               while (1) {
-                       spin_lock_irqsave(&info->lock, flags);
-                       c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
-                                                 SERIAL_XMIT_SIZE - info->xmit_head));
-                       if (c <= 0) {
-                               spin_unlock_irqrestore(&info->lock, flags);
-                               break;
-                       }
-                       memcpy(info->xmit_buf + info->xmit_head, buf, c);
-                       info->xmit_head = ((info->xmit_head + c) &
-                                          (SERIAL_XMIT_SIZE-1));
-                       info->xmit_cnt += c;
+       while (1) {
+               spin_lock_irqsave(&info->lock, flags);
+               c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
+                                         SERIAL_XMIT_SIZE - info->xmit_head));
+               if (c <= 0) {
                        spin_unlock_irqrestore(&info->lock, flags);
-                       buf += c;
-                       count -= c;
-                       ret += c;
+                       break;
                }
+               memcpy(info->xmit_buf + info->xmit_head, buf, c);
+               info->xmit_head = ((info->xmit_head + c) &
+                                  (SERIAL_XMIT_SIZE-1));
+               info->xmit_cnt += c;
+               spin_unlock_irqrestore(&info->lock, flags);
+               buf += c;
+               count -= c;
+               ret += c;
        }
        spin_lock_irqsave(&info->lock, flags);
        if (info->xmit_cnt && !tty->stopped && !info->tx_stopped