tty: replace BKL with a new tty_lock
As a preparation for replacing the big kernel lock
in the TTY layer, wrap all the callers in new
macros tty_lock, tty_lock_nested and tty_unlock.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/char/amiserial.c b/drivers/char/amiserial.c
index 4f8d60c..1b21a7a 100644
--- a/drivers/char/amiserial.c
+++ b/drivers/char/amiserial.c
@@ -1072,7 +1072,7 @@
if (!retinfo)
return -EFAULT;
memset(&tmp, 0, sizeof(tmp));
- lock_kernel();
+ tty_lock();
tmp.type = state->type;
tmp.line = state->line;
tmp.port = state->port;
@@ -1083,7 +1083,7 @@
tmp.close_delay = state->close_delay;
tmp.closing_wait = state->closing_wait;
tmp.custom_divisor = state->custom_divisor;
- unlock_kernel();
+ tty_unlock();
if (copy_to_user(retinfo,&tmp,sizeof(*retinfo)))
return -EFAULT;
return 0;
@@ -1100,14 +1100,14 @@
if (copy_from_user(&new_serial,new_info,sizeof(new_serial)))
return -EFAULT;
- lock_kernel();
+ tty_lock();
state = info->state;
old_state = *state;
change_irq = new_serial.irq != state->irq;
change_port = (new_serial.port != state->port);
if(change_irq || change_port || (new_serial.xmit_fifo_size != state->xmit_fifo_size)) {
- unlock_kernel();
+ tty_unlock();
return -EINVAL;
}
@@ -1127,7 +1127,7 @@
}
if (new_serial.baud_base < 9600) {
- unlock_kernel();
+ tty_unlock();
return -EINVAL;
}
@@ -1163,7 +1163,7 @@
}
} else
retval = startup(info);
- unlock_kernel();
+ tty_unlock();
return retval;
}
@@ -1538,7 +1538,7 @@
orig_jiffies = jiffies;
- lock_kernel();
+ tty_lock_nested(); /* tty_wait_until_sent is called from lots of places */
/*
* Set the check interval to be 1/5 of the estimated time to
* send a single character, and make it at least 1. The check
@@ -1579,7 +1579,7 @@
break;
}
__set_current_state(TASK_RUNNING);
- unlock_kernel();
+ tty_unlock();
#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
#endif